Researchers Database

YOSHIE, Naoki

    Center for Marine Environmental Studies Assistant Professor
Last Updated :2020/11/10

Researcher Information

J-Global ID

Research Interests

  • 海洋生態系モデル   東シナ海   黒潮   モニタリング   沿岸   Phytoplankton   Biogeochemical Cycles   Zooplankton   Seto Inland Sea   Oceanic Water Intrusion   Climate Change   Global Warming   Nutrient   Harmful Algae Bloom   

Research Areas

  • Life sciences / Aquaculture
  • Nanotechnology/Materials / Green/sustainable/environmental chemistry
  • Nanotechnology/Materials / Analytical chemistry
  • Environmental science/Agricultural science / Environmental materials/recycling technology
  • Environmental science/Agricultural science / Recycling systems and society
  • Environmental science/Agricultural science / Social-ecological systems
  • Natural sciences / Atmospheric and hydrospheric science
  • Environmental science/Agricultural science / Environmental impact assessment
  • Environmental science/Agricultural science / Environmental dynamics

Academic & Professional Experience

  • 2011/04  愛媛大学 沿岸環境科学研究センター講師
  • 2009/04 - 2011/03  愛媛大学 沿岸環境科学研究センター特任助教
  • 2006/04 - 2009/03  水産総合研究センター 東北区水産研究所JSPS特別研究員
  • 2005/04 - 2006/03  北海道大学 大学院地球環境科学研究院学術研究員
  • 2003/01 - 2005/03  北海道大学 大学院地球環境科学研究科COE研究員
  • 2002/10 - 2002/12  日本海洋科学振興財団協力研究員
  • 1999/04 - 2002/03  北海道大学 大学院地球環境科学研究科JSPS 特別研究員

Association Memberships

  • 日本海洋学会海洋生物学研究会   瀬戸内海研究会議   Coastal Oceanography Research Committee of THE OCEANOGRAPHIC SOCIETY OF JAPAN   JAPAN GEOSCIENCE UNION   association for the sciences of Limnology and Oceanography   JAPANESE SOCIETY OF FISHERIES OCEANOGRAPHY   THE OCEANOGRAPHIC SOCIETY OF JAPAN   

Published Papers

  • Takashi Mano, Xinyu Guo, Naoki Fujii, Naoki Yoshie, Eisuke Tsutsumi, Rui Saito
    Journal of Oceanography 75 359 - 374 0916-8370 2019/08 
    © 2019, The Oceanographic Society of Japan and Springer Nature Singapore Pte Ltd. We found a good linear relation between the mean volume backscattering strength measured using a scientific echo sounder and the distribution density of moon jellyfish recorded simultaneously by an underwater video camera in small bays (Hokezu Bay and Mikame Bay) in Japan. This relation held in all of the surveys carried out in recent years (2013–2016), although the regression coefficient varied slightly from year to year due to the existence of ambient organisms. Using this relation and high-resolution echo sounder scan surveys across the bay, we obtained the spatial structures of moon jellyfish aggregations and categorized them into either patchy, layered, or wavy aggregations. We also examined possible physical mechanisms responsible for the moon jellyfish aggregations. In particular, passive particle tracking simulations of several idealized internal wave fields suggest that the formation of wavy aggregations is closely related to the presence of internal waves. However, internal waves alone cannot induce patchy and layered aggregations, indicating that particular biological processes (e.g., swimming behavior) are also necessary for such aggregations to form.
  • Nagai Takeyoshi, Duran Gloria Silvana, Otero Diego Andre, Mori Yasutaka, Yoshie Naoki, Ohgi Kazuki, Hasegawa Daisuke, Nishina Ayako, Kobari Toru
    GEOPHYSICAL RESEARCH LETTERS 46 (12) 6726 - 6735 0094-8276 2019/06 [Peer-reviewed]
  • Maure E. R, Ishizaka J, Aiki H, Mino Y, Yoshie N, Goes J. I, Gomes H. R, Tomita H
    JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 123 (9) 6841 - 6860 2169-9275 2018/09 [Peer-reviewed]
  • Tomohiro Komorita, Xinyu Guo, Naoki Yoshie, Naoki Fujii, Hidetaka Takeoka
    CONTINENTAL SHELF RESEARCH 112 68 - 77 0278-4343 2016/01 [Peer-reviewed]
     Scientific journal 
    Monthly field surveys conducted from April to November 2009 in a tidal front in the Seto Inland Sea, Japan provided a spatial and temporal dataset for investigating seasonal variations in nutrient supply and the formation of a chlorophyll a (Chl-a) maximum. The upward diffusive flux of nutrients is estimated from observational data but it accounted for less than 5% of the nutrients needed to support the primary production of phytoplankton in the front area of the stratification region when the density difference between the surface layer and bottom layer is greater than 0.5 kg m(-3). Instead of vertical diffusion, the lateral intrusion of water with high nutrient concentration from the mixed area represented the major nutrient supply in the front area. The depth of the lateral intrusion changed with the month: the surface layer in July became the middle layer in August. According to the calculation of numerical model, an anticlockwise circulation is intensified by removing river runoff (i.e., low precipitation) in this study area, and the change of lateral intrusion is likely caused by the change of anti-clockwise circulation along with the temporal variation in river runoff. Consequently, the Chl-a peak appeared in the vicinity of the surface front (up to 3 mu g L-1) in July, but was in the subsurface (up to 9 mu g L-1) in August. Diatom species were a relatively minor taxa of the phytoplankton community up to July, although a relatively high Si(OH)(4)-Si concentration (up to 20 mu mol L-1) was confirmed. In contrast, the subsurface Chl-a maximum (SCM) in August was mainly comprised of diatoms as evidenced by the reduction of both Si(OH)(4)-Si and SUN from the surface to subsurface layer (0-20 m depth). Therefore, the supply of both nutrients and the seed population necessary for the formation of the SCM results from the tidal frontal system and phytoplankton assemblages within the tidal front system should be varied on a monthly basis. (C) 2015 Elsevier Ltd. All rights reserved.
  • Yuki Sato-Takabe, Shotaro Suzuki, Ryuki Shishikura, Koji Hamasaki, Yuya Tada, Takafumi Kataoka, Taichi Yokokawa, Naoki Yoshie, Satoru Suzuki
    JOURNAL OF OCEANOGRAPHY 71 (1) 151 - 159 0916-8370 2015/02 [Peer-reviewed]
     Scientific journal 
    Aerobic anoxygenic phototrophic bacteria (AAnPB) are bacteriochlorophyll a-containing photoheterotrophic organisms that rely on phototrophy and heterotrophy processes for energy acquisition. Here, we demonstrate the ubiquitous distribution of AAnPB in the Uwa Sea and their relatively larger cell size among members of the bacteria community. The contribution of AAnPB in terms of cell number to the total bacterial abundance ranged from 3.5 % to 7.9 %. The mean cell volume for AAnPB was 2.78 +/- A 0.72 times larger than the mean cell volume of the total bacteria. The ratio of the contribution of their biovolume to the total bacteria was estimated to be 9.7-22 %.
  • Jennifer L. Boldt, Rebecca Martone, Jameal Samhouri, R. Ian Perry, Sachihiko Itoh, Ik Kyo Chung, Motomitsu Takahashi, Naoki Yoshle
    OCEANOGRAPHY 27 (4) 116 - 133 1042-8275 2014/12 Scientific journal 
    Human activities in coastal and marine ecosystems provide a suite of benefits for people, but can also produce a number of stressors that can act additively, synergistically, or antagonistically to change ecosystem structure, function, and dynamics in ways that differ from single stressor responses. Scientific tools that can be used to evaluate the effects of multiple stressors are needed to assist decision making. In this paper, we review indicator selection methods and general approaches to assess indicator responses to multiple stressors and compare example ecosystem assessments. Recommendations are presented for choosing and assessing suites of indicators to characterize responses. Indicators should be chosen based upon defined criteria, conceptual models linking indicators to pressures and drivers, and defined strategic goals and ecological or management objectives. Indicators should be complementary and nonredundant, and they should integrate responses to multiple stressors and reflect the status of the ecosystem. An initial core set of indicators could include those that have been tested for the effects of climate and fishing and then expanded to include other pressures and ecosystem-specific, feature-pressure interactions. Identifying indicators and evaluating multiple stressors on marine ecosystems require a variety of approaches, such as empirical analyses, expert opinion, and model-based simulation. The goal is to identify a meaningful set of indicators that can be used to assist with the management of multiple types of human interactions with marine ecosystems.
  • Takeshi Okunishi, Shin-ichi Ito, Taketo Hashioka, Takashi T. Sakamoto, Naoki Yoshie, Hiroshi Sumata, Yumiko Yara, Naosuke Okada, Yasuhiro Yamanaka
    CLIMATIC CHANGE 115 (3-4) 485 - 503 0165-0009 2012/12 [Peer-reviewed]
     Scientific journal 
    We developed a multi-trophic level ecosystem model by coupling physical, biogeochemical-plankton and fish models. An oceanic general circulation model was coupled with a lower trophic level ecosystem model and a Japanese sardine migration model, and applied to the western North Pacific. To investigate the impact of global warming on the pelagic fish ecosystem, such as Japanese sardine, we conducted numerical experiments of growth and migration of Japanese sardine using physical fields for the present day and future with a global warming scenario simulated by a high-resolution climate model. The model results demonstrated possible impacts of global warming on the growth and migration pattern of Japanese sardine. The growths of fish in the current main spawning region under the global warming scenario were significantly slower than those under the present climate scenario. Fish in this region will be at disadvantage for their recruitment under the global warming condition. Prey conditions in the spawning region were projected not to markedly change under global warming condition while water temperature increased. As a result sardine spawning ground was projected to shift towards more north areas. During the feeding migration period in summer, geographical distribution of juveniles fish was projected to shift northwards by one to two degrees latitude under the global warming condition following the change in the distribution of optimal temperature region for feeding. However, this northwards shift of the optimal temperature for feeding was minimized adjacent to the western North Pacific by the cooler water supply by the intensification of the Oyashio.
  • M. Shigemitsu, T. Okunishi, J. Nishioka, H. Sumata, T. Hashioka, M. N. Aita, S. L. Smith, N. Yoshie, N. Okada, Y. Yamanaka
    JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 117 0148-0227 2012/06 Scientific journal 
    To investigate the iron cycle at Station A4 in the Oyashio region of the western subarctic Pacific, we developed a 1-D ecosystem model consisting of 14 components including the iron cycle. The parameters associated with the iron cycle were optimized by assimilating monthly averaged data from time series observations for depth-integrated net primary production, nitrate, silicate, dissolved and particulate iron within the surface mixed layer (ML) and at two depths (200 and 300 m depth). The model successfully reproduced the observations and demonstrated that (1) on an annual basis, winter mixing of subsurface water supplies more dissolved iron (Fe-d) to the ML than does dust dissolution, (2) Fe-d concentration in the ML rapidly declines to near-depletion during the peak period of the diatom bloom in spring, which results in an increasing consumption ratio of silicate to nitrogenous nutrients by diatoms as they become more iron-limited, causing a more rapid decrease of silicate compared to that of nitrogenous nutrients in the ML, followed by the silicate limitation of diatoms, and (3) Fe-d supplied to the ML by dust dissolution and desorption from particulate iron, by alleviating iron limitation of phytoplankton, supports their continuous utilization of nitrate from spring to fall even though Fe-d concentration in the ML remains low after the peak spring bloom. The model explained quantitatively the above behavior of Fe-d and other nutrients associated with Fe-d over the annual cycle in the Oyashio region.
  • Takeshi Okunishi, Shin-Ichi Ito, Daisuke Ambe, Akinori Takasuka, Takahiko Kameda, Kazuaki Tadokoro, Takashi Setou, Kosei Komatsu, Atsushi Kawabata, Hiroshi Kubota, Tadafumi Ichikawa, Hiroya Sugisaki, Taketo Hashioka, Yasuhiro Yamanaka, Naoki Yoshie, Tomowo Watanabe
    FISHERIES OCEANOGRAPHY 21 (1) 44 - 57 1054-6006 2012 [Peer-reviewed]
     Scientific journal 
    A two-dimensional individual-based fish movement model coupled with fish bioenergetics was developed to simulate the observed migration and growth of Japanese sardine (Sardinops melanostictus) in the western North Pacific. In the model, derived from the observed oceanenvironmental data as the driving force, fish movement was adapted as a kinesis behavior. The model successfully simulated the observed transport patterns during the egg and larval stages and the northward migrations during the juvenile stage in 2005, 2006 and 2007. The model results showed that both temperature during the larval stage in the Kuroshio Extension and the prey availability during the early juvenile stage in the KuroshioOyashio transitional area are important factors for growth of Japanese sardine. In autumn, the observed juvenile sardine were mainly distributed in the subarctic water region off the Kuril Islands, which is an area (158165 degrees E, 4347 degrees N) with a high chlorophyll-a (Chl-a) concentration. The model reproduced the fish distribution, which has a high density in this region. The high Chl-a concentration area in autumn may contribute to increasing the survival rate of Japanese sardine by cascading up the food chain, from the high primary production, and is an important habitat for recruitment success of Japanese sardine.
  • Koji Suzuki, Akira Kuwata, Naoki Yoshie, Akira Shibata, Kyoko Kawanobe, Hiroaki Saito
    DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 58 (5) 575 - 589 0967-0637 2011/05 [Peer-reviewed]
     Scientific journal 
    We characterized the community composition of phytoplankton in the western subarctic Pacific from the pre-bloom to the decline phase of the spring bloom with special reference to decreases in the silicic acid concentration in surface waters as an index for diatom bloom development. Furthermore, responses of heterotrophic bacteria and viruses to the spring bloom were also concomitantly investigated. Under pre-bloom conditions when nutrients were abundant but the surface mixed layer depth was relatively deep, chlorophyll (Chl) a concentrations were consistently low and green algae (chlorophytes and prasinophytes), cryptophytes, and diatoms were predominant in the phytoplankton assemblages as estimated by algal pigment signatures. Together with the shallowing of the mixed layer depth and the decrease in silicic acid concentration, diatoms bloomed remarkably in the Oyashio region, though the magnitude of the bloom in the Kuroshio-Oyashio transition (hereafter Transition) region was relatively small. A total of 77 diatom species were identified, with the bloom-forming diatoms mainly consisting of Thalassiosira, Chaetoceros, and Fragilariopsis species. It has become evident that the carotenoid fucoxanthin can serve as a strong indicator of the diatom carbon biomass during the spring diatom bloom. Differences in the species richness of diatoms among stations generally enabled us to separate the Oyashio bloom stations from the Transition and the Oyashio pre-bloom stations. Relatively high values of the Shannon-Wiener index for the diatom species were also maintained during the Oyashio bloom, indicating that a wide variety of species then shared dominance. In the decline phase of the Oyashio bloom when surface nutrient concentrations decreased, senescent diatom cells increased, as inferred from the levels of chlorophyllide a. Although the cell density of heterotrophic bacteria changed little with the development of the diatom bloom, viral abundance increased toward the end of the bloom, suggesting an increased likelihood of mortality among organisms including diatoms resulting from viral infection. This is the first report on the microbial trophodynamics, including viruses, during the spring diatom bloom in the western subarctic Pacific. (C) 2011 Elsevier Ltd. All rights reserved.
  • Hiroshi Sumata, Taketo Hashioka, Tatsuo Suzuki, Naoki Yoshie, Takeshi Okunishi, Maki N. Aita, Takashi T. Sakamoto, Akio Ishida, Naosuke Okada, Yasuhiro Yamanaka
    JOURNAL OF MARINE SYSTEMS 83 (1-2) 67 - 87 0924-7963 2010/10 [Peer-reviewed]
     Scientific journal 
    Hindcast experiment with an eddy-permitting ocean ecosystem model was performed in order to investigate the process of nutrient supply into the euphotic zone by vertical and horizontal fluxes with multiple time scales. The model reasonably reproduced the basin-scale spatial pattern of biological production and its seasonal cycles with eddy fields, statistically consistent with those observed in the satellite images. The model results illustrated the nutrient cycle in the euphotic zone with mesoscale eddies, in which the vertical advection with mesoscale spatial variation and convection with relatively large spatial variation supply nutrients into the euphotic zone, and the horizontal advection redistributes them within the euphotic zone, thereby fueling biological production. The vertical advection associated with mean flow supplies a substantial part of nutrients from the aphotic zone, and contributions from time-varied vertical fluxes are limited within the tropical region and regions where strong meandering currents exist. Horizontal advection due to seasonal and eddy fluctuations plays an important role in the redistribution process, in addition to that effected by temporal-mean advection. The relative importance of these fluctuations strongly depends on the horizontal scales of vertical nutrient supply, in contrast to the relatively small effects eddy fields have on heat or fresh-water transport in the global ocean. (C) 2010 Elsevier B.V. All rights reserved.
  • Shin-ichi Ito, Naoki Yoshie, Takeshi Okunishi, Tsuneo Ono, Yuji Okazaki, Akira Kuwata, Taketo Hashioka, Kenneth A. Rose, Bernard A. Megrey, Michio J. Kishi, Miwa Nakamachi, Yugo Shimizu, Shigeho Kakehi, Hiroaki Saito, Kazutaka Takahashi, Kazuaki Tadokoro, Akira Kusaka, Hiromi Kasai
    PROGRESS IN OCEANOGRAPHY 87 (1-4) 186 - 200 0079-6611 2010/10 [Peer-reviewed]
     
    The Oyashio region in the western North Pacific supports high biological productivity and has been well monitored. We applied the NEMURO (North Pacific Ecosystem Model for Understanding Regional Oceanography) model to simulate the nutrients, phytoplankton, and zooplankton dynamics. Determination of parameters values is very important, yet ad hoc calibration methods are often used. We used the automatic calibration software PEST (model-independent Parameter ESTimation), which has been used previously with NEMURO but in a system without ontogenetic vertical migration of the large zooplankton functional group. Determining the performance of PEST with vertical migration, and obtaining a set of realistic parameter values for the Oyashio, will likely be useful in future applications of NEMURO. Five identical twin simulation experiments were performed with the one-box version of NEMURO. The experiments differed in whether monthly snapshot or averaged state variables were used, in whether state variables were model functional groups or were aggregated (total phytoplankton, small plus large zooplankton), and in whether vertical migration of large zooplankton was included or not. We then applied NEMURO to monthly climatological field data covering 1 year for the Oyashio, and compared model fits and parameter values between PEST-determined estimates and values used in previous applications to the Oyashio region that relied on ad hoc calibration. We substituted the PEST and ad hoc calibrated parameter values into a 3-D version of NEMURO for the western North Pacific, and compared the two sets of spatial maps of chlorophyll-a with satellite-derived data. The identical twin experiments demonstrated that PEST could recover the known model parameter values when vertical migration was included, and that over-fitting can occur as a result of slight differences in the values of the state variables. PEST recovered known parameter values when using monthly snapshots of aggregated state variables, but estimated a different set of parameters with monthly averaged values. Both sets of parameters resulted in good fits of the model to the simulated data. Disaggregating the variables provided to PEST into functional groups did not solve the over-fitting problem, and including vertical migration seemed to amplify the problem. When we used the climatological field data, simulated values with PEST-estimated parameters were closer to these field data than with the previously determined ad hoc set of parameter values. When these same PEST and ad hoc sets of parameter values were substituted into 3-D-NEMURO (without vertical migration), the PEST-estimated parameter values generated spatial maps that were similar to the satellite data for the Kuroshio Extension during January and March and for the subarctic ocean from May to November. With non-linear problems, such as vertical migration, PEST should be used with caution because parameter estimates can be sensitive to how the data are prepared and to the values used for the searching parameters of PEST. We recommend the usage of PEST, or other parameter optimization methods, to generate first-order parameter estimates for simulating specific systems and for insertion into 2-D and 3-D models. The parameter estimates that are generated are useful, and the inconsistencies between simulated values and the available field data provide valuable information on model behavior and the dynamics of the ecosystem. (C) 2010 Elsevier Ltd. All rights reserved.
  • S. Lan Smith, Naoki Yoshie, Yasuhiro Yamanaka
    DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 57 (3) 394 - 408 0967-0637 2010/03 [Peer-reviewed]
     Scientific journal 
    During the SERIES iron-enrichment experiment in the eastern subarctic Pacific, after addition of iron and its subsequent depletion, the Si:N drawdown ratio increased at approximately the time that diatoms became iron limited. Laboratory studies have reported that this results from a decrease in the rate of N uptake together with a more moderate decrease in the rate of Si uptake for iron-limited cultures compared to iron-replete cultures. However, for SERIES Boyd et al. (Limnol. Oceanogr. 50 (2005)) reported an unexplained increase in the rate of Si uptake at the onset of iron limitation and suggested that studies of nutrient uptake kinetics should be undertaken in search of an explanation. We compare the classic Michealis-Menten (MM) kinetics to the recently developed optimal uptake (OU) kinetics (the SPONGE: Smith and Yamanaka. Limnol. Oceanogr. 52 (2007)) within a variable-composition model, which employs cell quotas for each relevant nutrient, applied to the multielement (C, N, Si, Fe) dynamics during SERIES. Using the Monte Carlo Markov Chain, we fit two versions of the model (differing only in the equations for nutrient uptake) to the available data for nutrient concentrations, chlorophyll, biogenic silica and particulate organic carbon and specific growth rates. With either uptake kinetics, the model reproduces observed concentrations well for nutrients and somewhat less well for chlorophyll. The different uptake kinetics yield greater differences in modeled elemental composition of phytoplankton and biomass of phytoplankton and zooplankton, which are not directly constrained by data. MM kinetics cannot reproduce the observed increase in Si uptake rate as a function of the decreasing trend in concentration of silicic acid, and it predicts Si limitation throughout nearly all of the experiment after iron-fertilization. In contrast, OU kinetics reproduces the increase in Si uptake rate and matches the observation-based estimate for the timing of the return to iron limitation. The key assumption of the SPONGE, that uptake rates of all nutrients depend on physiological acclimation by phytoplankton as a function of the ambient concentration of the growth-limiting nutrient, was originally formulated for modeling chemostat experiments. We show that it also agrees with the observations from this field experiment and provides an explanation for the increases in Si uptake rate and Si:N drawdown ratio. (C) 2009 Elsevier Ltd. All rights reserved.
  • Naoki Yoshie, Koji Suzuki, Akira Kuwata, Jun Nishioka, Hiroaki Saito
    MARINE ECOLOGY PROGRESS SERIES 399 39 - 52 0171-8630 2010 [Peer-reviewed]
     Scientific journal 
    Variations in photosynthetic parameters of phytoplankton during the spring bloom were investigated in the western subarctic Pacific. Light-saturated maximum photosynthesis rate (P-max(B)) and light-limited slope (alpha(B)) in the photosynthesis-irradiance (P-E) curve were almost constant in the first half of the bloom and then concurrently increased by 5 times in the latter half with a constant light-saturation index (E-k = p(max)(B)/alpha(B)). In contrast, the maximum photochemical quantum efficiency (F-v/F-m) of the algal photosystem II increased in the first half and thereafter decreased. Water temperature significantly affected the covariation in P-max(B) and alpha(B) (i.e. E-k-independent variability), suggesting that dark reaction processes in photosynthesis mainly regulated the changes in the P-E parameters. Although influences of nitrate, silicic acid, and dissolved iron on the P-E parameters were not observed, the elevated ammonium levels found in the latter half of the bloom could contribute to the E-k-independent variability. There was no significant relationship among algal net growth rate, P-max(B), and alpha(B) throughout the observations. Since most ecosystem models have used a constant alpha(B), parallel changes in P-max(B) and alpha(B) should be taken into account in models reproducing ecosystem dynamics during spring diatom blooms.
  • Atsushi Tsuda, Shigenobu Takeda, Hiroaki Saito, Jun Nishioka, Isao Kudo, Yukihiro Nojiri, Koji Suzuki, Mitsuo Uematsu, Mark L. Wells, Daisuke Tsumune, Takeshi Yoshimura, Tatsuo Aono, Takafumi Aramaki, William P. Cochlan, Maki Hayakawa, Keiri Imai, Tomoshi Isada, Yoko Iwamoto, William K. Johnson, Sohiko Kameyama, Shungo Kato, Hiroshi Kiyosawa, Yoshiko Kondo, Maurice Levasseur, Ryuji J. Machida, Ippei Nagao, Fumiko Nakagawa, Takahiro Nakanish, Seiji Nakatsuka, Akira Narita, Yoshifumi Noiri, Hajime Obata, Hiroshi Ogawa, Kenji Oguma, Tsuneo Ono, Tomofumi Sakuragi, Motoki Sasakawa, Mitsuhide Sato, Akifumi Shimamoto, Hyoe Takata, Charles G. Trick, Yutaka W. Watanabe, Chi Shing Wong, Naoki Yoshie
    JOURNAL OF OCEANOGRAPHY 63 (6) 983 - 994 0916-8370 2007/12 [Peer-reviewed]
     Scientific journal 
    mesoscale iron-enrichment study (SEEDS II) was carried out in the western subarctic Pacific in the summer of 2004. The iron patch was traced for 26 days, which included observations of the development and the decline of the bloom by mapping with sulfur hexafluoride. The experiment was conducted at almost the same location and the same season as SEEDS (previous iron-enrichment experiment). However, the results were very different between SEEDS and SEEDS II. A high accumulation of phytoplankton biomass (similar to 18 mg chl m(-3)) was characteristic of SEEDS. In contrast, in SEEDS II, the surface chlorophyll-a accumulation was lower, 0.8 to 2.48 mg m(-3), with no prominent diatom bloom. Photosynthetic competence in terms of F-v/F-m for the total phytoplankton community in the surface waters increased after the iron enrichments and returned to the ambient level by day 20. These results suggest that the photosynthetic physiology of the phytoplankton assemblage was improved by the iron enrichments and returned to an iron-stressed condition during the declining phase of the bloom. Pico-phytoplankton (< 2 mu m) became dominant in the chlorophyll-a size distribution after the bloom. We observed a nitrate drawdown of 3.8 mu M in the patch (day 21), but there was no difference in silicic acid concentration between inside and outside the patch. Mesozooplankton (copepod) biomass was three to five times higher during the bloom-development phase in SEEDS II than in SEEDS. The copepod biomass increased exponentially. The grazing rate estimation indicates that the copepod grazing prevented the formation of an extensive diatom bloom, which was observed in SEEDS, and led to the change to a pico-phytoplankton dominated community towards the end of the experiment.
  • Michio J. Kishi, Makoto Kashiwai, Daniel M. Ware, Bernard A. Megrey, David L. Eslinger, Francisco E. Werner, Maki Noguchi-Aita, Tomonori Azumaya, Masahiko Fujii, Shinji Hashimoto, Daji Huang, Hitoshi Iizumi, Yukimasa Ishida, Sukyung Kang, Gennady A. Kantakov, Hyun-cheol Kim, Kosei Komatsu, Vadim V. Navrotsky, S. Lan Smith, Kazuaki Tadokoro, Atsushi Tsuda, Orio Yamamura, Yasuhiro Yamanaka, Katsumi Yokouchi, Naoki Yoshie, Jing Zhang, Yury I. Zuenko, Vladimir I. Zvalinsky
    ECOLOGICAL MODELLING 202 (1-2) 12 - 25 0304-3800 2007/03 [Peer-reviewed]
     Scientific journal 
    The PICES CCCC (North Pacific Marine Science Organization, Climate Change and Carrying Capacity program) MODEL Task Team achieved a consensus on the structure of a prototype lower trophic level ecosystem model for the North Pacific Ocean, and named it the North Pacific Ecosystem Model for Understanding Regional Oceanography, "NEMURO". Through an extensive dialog between modelers, plankton biologists and oceanographers, an extensive review was conducted to define NEMURO's process equations and their parameter values for distinct geographic regions. We present in this paper the formulation, structure and governing equations of NEMURO as well as examples to illustrate its behavior. NEMURO has eleven state variables: nitrate, ammonium, small and large phytoplankton biomass, small, large and predatory zooplankton biomass, particulate and dissolved organic nitrogen, particulate silica, and silicic acid concentration. Several applications reported in this issue of Ecological Modelling have successfully used NEMURO, and an extension that includes fish as an additional state variable. Applications include studies of the biogeochemistry of the North Pacific, and variations of its ecosystem's lower trophic levels and two target fish species at regional and basin-scale levels, and on time scales from seasonal to interdecadal. (c) 2006 Elsevier B.V. All rights reserved.
  • Naoki Yoshie, Yasuhiro Yamanaka, Kenneth A. Rose, David L. Eslinger, Daniel M. Ware, Michio J. Kishi
    ECOLOGICAL MODELLING 202 (1-2) 26 - 37 0304-3800 2007/03 [Peer-reviewed]
     Scientific journal 
    We investigated the parameter sensitivity of the NEMURO ecosystem model calibrated to field at two typical Stations (A7 and P) in the subarctic North Pacific. The NEMURO model follows various forms of nitrogen and silicon, and the daily biomasses of two phytoplankton and three zooplankton groups for multiple years. Previously calibrated versions to data at two stations provided the basis for comparing parameter sensitivities under different environmental and biological conditions. Four sensitivity analysis experiments were performed involving 72 parameters: 3 experiments used Monte Carlo methods and 1 experiment used a 1-parameter-at-a-time approach. Normalized sensitivities and correlation were used as sensitivity measures for comparison among the four experiments. Monte Carlo and one-parameter-at-a-time methods that used relatively small variations in parameter values (less than or equal to +/- 10%) yielded very similar rankings of the top five parameters. Parameter rankings from the Monte Carlo analysis that used relatively large variation in parameters (-50% to +100%) differed slightly from the rankings obtained with the small variations. Additional examination of the 10% results showed that parameters deemed important differed among prognostic variables and differed between Stations A7 and P. For example, annual small phytoplankton biomass was most sensitive to the maximum grazing rate of small zooplankton at both stations, while large phytoplankton biomass was most sensitive to its own maximum photosynthetic rate parameter. While at Station A7 large phytoplankton was sensitive to zooplankton parameters, at Station P it was more sensitive to phytoplankton parameters. A few of certain phytoplankton parameters were consistently important in all sensitivity experiments. Despite sometimes complex relationships between prognostic variables and parameters, our analyses showed that the NEMURO model was generally well-behaved and was robust to parameter variation and to the method used for the sensitivity analysis. Extensions of our analysis could involve computing the sensitivity measure over time through the year, and the use other types of prognostic variables than biomass such as the timing of the phytoplankton bloom. Sensitivity analyses, such as those performed here, are useful tools for applying the NEMURO to other locations and for helping to interpret and diagnose existing NEMURO applications. (c) 2006 Elsevier B.V. All rights reserved.
  • S. Takeda, N. Yoshie, P. W. Boyd, Y. Yamanaka
    DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 53 (20-22) 2297 - 2326 0967-0645 2006 Scientific journal 
    Numerical modeling experiments were conducted to examine the reasons for observed changes in the silicic acid ([Si(OH)(4)]) to nitrate ([NO(3)(-)]) drawdown ratio after the onset of algal iron stress during SERIES. During phytoplankton blooms and immediately after them, cells encounter a range of iron stress (between iron-replete and iron-deplete) and therefore show a range of growth rates. For these reasons, the potential influence of phytoplankton growth rate, under conditions of algal iron stress, on silicic acid and nitrate depletion were investigated in numerical experiments by altering the timing of a shift in the [Si(OH)(4)]:[NO(3)(-)] uptake ratio. These simulations suggested that the continued growth of iron-stressed phytoplankton at sub-maximum rates, with an elevated [Si(OH())]:[NO(3)(-)] uptake ratio, induced depletion of silicic acid in the surface water and resulted in simultaneous limitation of growth by both iron and silicic-acid supply. Therefore, bottom-up control played an important role in terminating the phytoplankton bloom in SERIES. In the model simulations, the enhancement of diatom silicification due to increased rates of biomass-normalized silicic-acid uptake, led to increases in the export flux of opal after the onset of algal iron-stress and, consequently, it stimulated the silica pump. The regulation of both the [Si(OH)(4)]:[NO(3)(-)] uptake ratio and the growth rate of phytoplankton by iron supply are important factors that determine the relative consumption of silicic acid and nitrate upon iron stress, although the potential influence of a floristic shift in the diatom assemblage cannot be ruled out. These findings offer insights into the impact of iron fertilization, both artificial and natural, on the biogeochemical cycling of nutrients in high-nitrate, low-chlorophyll waters. (c) 2006 Elsevier Ltd. All rights reserved.
  • N Yoshie, Y Yamanaka
    JOURNAL OF OCEANOGRAPHY 61 (6) 1059 - 1073 0916-8370 2005/12 Scientific journal 
    Two processes are generally explained as causes of temporal changes in the stoichiometric silicon/nitrogen (Si/N) ratios of sinking particles and of nutrient consumption in the surface water during the spring diatom bloom: (1) physiological changes of diatom under the stress of photosynthesis of diatom and (2) differences of regeneration between silicon and nitrogen. We investigated which process plays an important role in these changes using a one-dimensional ecosystem model that explicitly represents diatom and the other non-siliceous phytoplankton. The model was applied to station A7 (41 degrees 30'N, 145 degrees 30'E) in the western North Pacific, where diatom regularly blooms in spring. Model simulations show that the SUN ratios of the flux exported by the sinking particles at 100 m depth and of nutrient consumptions in the upper 100 m surface water have their maxima at the end of the spring diatom bloom, the values and timings of which are significantly different from each other. Analyses of the model results show that the differences of regeneration between silicon and nitrogen mainly cause the temporal changes of the SUN ratios. On the other hand, the physiological changes of diatoms under stress can hardly cause these temporal changes, because the effect of the change in the diatom's uptake ratio of silicon to nitrogen is cancelled by that in its sinking rate.
  • M Fujii, N Yoshie, Y Yamanaka, F Chai
    PROGRESS IN OCEANOGRAPHY 64 (2-4) 307 - 324 0079-6611 2005 
    To fill temporal gaps in iron-enrichment experimental data and gain further understanding of marine ecosystem responses to iron enrichments, we apply a fifteen-compartment ecosystem model to three iron-enrichment sites, namely SEEDS (the Subarctic Pacific Iron Experiment for Ecosystem Dynamics Study; 48.5 degrees N, 165 degrees E) in the western North Pacific, SOIREE (the Southern Ocean Iron RElease Experiment; 61 degrees S, 140 degrees E) in the Southern Ocean, and IronExII (the second mesoscale iron enrichment experiment; 3.5 degrees S, 104 degrees W) in the Equatorial Pacific. The ecological effects of iron in the model are represented by changing two photosynthetic parameters during the iron-enrichment period. The model results successfully reproduce the observed biogeochemical responses inside and outside the iron patch at each site, such as rapid increases in plankton biomass and biological productivity, and decreases in surface nutrients and pCO(2), inside the patch. However, the modeled timing and magnitude of changes differ among the sites because of differences in both physical environments and plankton species. After the iron enrichment, the diatom productivity is strongly controlled by light at SOIREE and by silicate at IronExII and SEEDS. Light limitation due to self-shading by the phytoplankton is significant during the bloom at all sites. Sensitivity analysis of the model results to duration of the iron enrichment reveals that long-term multiple infusions over more than a week would not be effective at SEEDS because of strong silicate limitation on diatom growth. Sensitivity of the model to water temperature shows that export production is higher at lower temperatures, because of slower recycling of particulate organic carbon. Therefore, the e-ratio (the ratio of export production to primary production) is inversely correlated with temperature, and the relationship can be described with a linear function. Through this study, we conclude that ecosystem modeling is a powerful tool to help design future iron-enrichment experiments and observational plans. (c) 2005 Elsevier Ltd. All rights reserved.
  • N Yoshie, M Fujii, Y Yamanaka
    PROGRESS IN OCEANOGRAPHY 64 (2-4) 283 - 306 0079-6611 2005 
    We have developed a one-dimensional ecosystem model considering explicitly two groups of diatoms: centric and pennate. The model was applied to the iron-enrichment experiment, SEEDS (Subarctic Pacific Iron Experiment for Ecosystem Dynamics Study) in the western North Pacific (48.5 degrees N, 165 degrees E). We assumed that the permate diatoms are not stressed by the iron limitation, but that the centric diatoms are significantly stressed and their photosynthetic rate is high when released from iron limitation. The iron-enrichment experiment was conducted by changing the physiological parameters for diatoms (the initial slope of the photosynthetic rate and the potential maximum photosynthetic rate). The model successfully reproduced the time-series of CO2 fugacity and the vertical distributions of chlorophyll-a and nutrients observed in SEEDS. The simulated results in the two-group model, especially the starting time of the diatom bloom, are better than those in the one-group model. We find that it is the transition of dominance, from permate to centric diatoms, rather than a physiological response of each group that causes the lag between iron-enrichment and the diatom bloom. In the simulations, the added iron's effect on the ecosystem continues for about 40 days. The model results suggest that the export flux during the observation period is only about 20% of the total export flux generated by iron-enrichment. For SEEDS, our simulated uptake of atmospheric CO2 and the export of particulate organic carbon at 100 m depth are 0.57 and 1.29 mol C m(-2), respectively, which are converted to 1720 and 3880 tC by assuming the patch's area to be 250 km(2), and to 4.90 and 11.1 tC kg(-1) Fe with the addition of 350 kg of iron. (c) 2005 Elsevier Ltd. All rights reserved.
  • Y Yamanaka, N Yoshie, M Fujii, MN Aita, MJ Kishi
    JOURNAL OF OCEANOGRAPHY 60 (2) 227 - 241 0916-8370 2004/04 Scientific journal 
    A model based on that of Kishi et al. (2001) has been extended to 15 compartments including silicon and carbon cycles. This model was applied to Station A7 off Hokkaido, Japan, in the Northwestern Pacific. The model successfully simulated the observations of: 1. a spring bloom of diatoms; 2. large seasonal variations of nitrate and silicate concentrations in the surface water; and 3. large inter-annual variations in chlorophyll-a. It also reproduced the observed features of the seasonal variations of carbon dioxide partial pressure (pCO(2))-a peak in pCO(2) in winter resulting from deep winter convection, a rapid decrease in pCO(2) as a result of the spring bloom, and an almost constant pCO(2) from summer through fall (when the effect of increasing temperature cancels the effect of biological production). A comparison of cases with and without silicate limitation shows that including silicate limitation in the model results in: 1. decreased production by diatoms during summer; and 2. a transition in the dominant phytoplankton species, from diatoms to other species that do not take up silicate. Both of these phenomena are observed at Station A7, and our results support the hypothesis that they are caused by silicate limitation of diatom growth.
  • N Yoshie, Y Yamanaka, MJ Kishi, H Saito
    JOURNAL OF OCEANOGRAPHY 59 (5) 563 - 571 0916-8370 2003/10 Scientific journal 
    A one-dimensional ecosystem model has been used to investigate the processes relevant to the spring diatom bloom which play important roles in the biogeochemical cycle in the western subarctic Pacific. The model represents the plankton dynamics and the nutrient cycles in the spring diatom bloom; its results show the importance of dilution by deep mixing in winter. It is supposed that the vertically integrated biomass of phytoplankton decreases in the winter due to the decrease of photosynthesis, because the deep mixing transports phytoplankton to a layer with a low light level. However, the observed integrated diatom biomass increases as the mixed layer deepens. This is because the decrease of concentration due to dilution by mixing causes the diatom grazed pressure to be less significant than diatom photosynthesis. In other words, the effect of dilution on the grazed rate is more significant than the effect on the photosynthesis rate because the grazed rate depends on the concentrations of both diatom and grazer, whereas the photosynthesis rate depends only diatom concentration. The average specific diatom grazed rate, defined as grazed rate divided by diatom biomass, decreases by 35% associated with the deepening, while the average specific photosynthesis rate of diatom decreases by 11%. As a result, the average specific net diatom growth rate during the deep mixing is about 70% of its maximum during the spring diatom bloom. The deep mixing significantly affects the amplitude of the spring diatom bloom not only by the supply of nutrients but also by the dilution which drastically decreases the grazed pressure.
  • KH Shin, T Hama, N Yoshie, S Noriki, S Tsunogai
    MARINE CHEMISTRY 70 (4) 243 - 256 0304-4203 2000/06 Scientific journal 
    C-13 uptake experiments were carried out at a station off the pleat coast of Hokkaido Island, Japan, during the period between late winter and spring bloom in 1997. The composition of newly biosynthesized particulate fatty acids was determined using a C-13 tracer and gas chromatography/mass spectrometry (C-13 GC/MS), and compared with that of particulate matter (seston). Two fatty acid compositional ratios revealed that diatoms biomass (16:1(n-7)/16:0, Sigma C-16/Sigma C-18) were strikingly high in new cells compared with seston on 17 April, coinciding with the dominance of fucoxanthin. In this study, the Polyunsaturation Index (a measure of the percentage of C-16 fatty acids that are polyunsaturated) in new cells is generally close to that in seston, while there was a notable discrepancy between new cells and seston in surface (10 m) waters on 17 April. This large difference between new cells and seston is ascribed to: (1) an increase of newly synthesized storage lipids (mainly 16:0 and 16:1) induced by nitrogen limitation in the top 10 m of the water column; (2) an addition of earlier synthesized phytoplankton cells (high Polyunsaturation Index at logarithmic growth stage) and non-phytoplankton components (detritus and bacteria and zooplankton) into seston. The highest Polyunsaturation Index of C-16 fatty acids in seston (33%) occurred at 100 m water depth. This may be caused by "settling planktonic aggregates" or "diatom resting spores". In the present study, it is reasonable to suggest that the Polyunsaturation Index of C-16 fatty acids can be a useful indicator for the ecophysiological state of marine diatom populations. (C) 2000 Elsevier Science B.V. All rights reserved.

Books etc

  • 里海管理論
    郭新宇, 王玉成, 久保田泰士, 吉江直樹 (Joint work, 4.3章 海洋環境保護区(MPA)の設定法)
    2019/03 367 158-171
  • 海の温暖化
    日本海洋学会編, 吉江直樹 (Joint work, 7.3 瀬戸内海西部における赤潮の変遷)
    朝倉書店 2017/07 9784254161304 154 129-132
  • 日本海洋学会沿岸海洋研究会, 日本海洋学会, 杉本 隆成, 小田巻 実, 吉川 裕, 日比谷 紀之, 松野 健, 島田 浩二, 武岡 英隆, 工藤 勲, 門谷 茂, 藤原 建紀, 左山 幹雄, 齊藤 宏明, 中野 伸一, 吉江 直樹, 柳 哲雄 
    恒星社厚生閣 2014 9784769914679

Conference Activities & Talks

  • GUO Xinyu, MATSUNO Takeshi, SENJU Tomoharu, ICHIKAWA Kaoru, ENDOH Takahiro, TSUTSUMI Eisuke, NISHINA Ayako, NAKAMURA Hirohiko, ZHANG Jing, HASEGAWA Daisuke, YOSHIE Naoki, KOBARI Toru
    日本地球惑星科学連合大会予稿集(Web)  2019
  • YOSHIE Naoki, KABE Anri, OHGI Kazuki, TSUTSUMI Eisuke, TAKEDA Shigenobu, ISHIZAKA Joji, GUO Xinyu
    日本地球惑星科学連合大会予稿集(Web)  2019
  • TSUTSUMI Eisuke, YOSHIE Naoki, MANO Takashi, KANDA Taisei, FUJII Naoki, GUO Xinyu
    日本地球惑星科学連合大会予稿集(Web)  2019
  • 長井健容, DURAN Silvana, OTERO Diego, 森泰貴, 吉江直樹, 大城一輝, 長谷川大介, 仁科文子, 小針統
    日本地球惑星科学連合大会予稿集(Web)  2019
  • 吉江直樹, 水口隼人, GUO Xinyu, 米田道夫, 阿保勝之, 河野悌昌, 藤田辰徳
    日本地球惑星科学連合大会予稿集(Web)  2019
  • 吉江直樹, 加部晏諒, 島袋寛盛, 吉田吾郎
    日本地球惑星科学連合大会予稿集(Web)  2019
  • 島袋寛盛, 吉田吾郎, 郭新宇, 吉江直樹, 村瀬昇, 野田幹雄, 清本節夫, 門田立, 吉村拓
    日本水産学会大会講演要旨集  2018/09
  • ITO Shin‐ichi, SETOU Takashi, HASEGAWA Toru, KITAJIMA Satoshi, TAKASUKA Akinori, YOSHIE Naoki, OKUNISHI Takeshi, TAKAHASHI Motomitsu, YONEDA Michio, AMANO Yuuhei, KOJIGUCHI Hiroki, GUO Chenying
    日本地球惑星科学連合大会予稿集(Web)  2018
  • YOSHIE Naoki, MIZUGUCHI Hayato, NAKAGAWA Miwa, GUO Xinyu
    日本地球惑星科学連合大会予稿集(Web)  2017
  • YOSHIDA Goro, SHIMABUKURO Hiromori, GUO Xinyu, YOSHIE Naoki, YU Xiaojie, MURASE Noboru, NODA Mikio, KIYOMOTO Setsuo, KADOTA Tatsuru, YOSHIMURA Taku
    日本水産学会大会講演要旨集  2017
  • HASEGAWA Daisuke, MATSUNO Takeshi, TSUTUMI Eisuke, SENJYU Tomoharu, NAKAMURA Hirohiko, KOBARI Toru, NISHINA Ayako, YOSHIE Naoki, GUO Xinyu, NAKAGAWA Miwa, NAGAI Takeyoshi, TANAKA Takahiro, YASUDA Ichiro
    日本地球惑星科学連合大会予稿集(Web)  2017
  • 眞野能, GUO X, 吉江直樹, 齋藤類, 藤井直紀, 堤英輔, 武岡英隆
    日本ベントス学会・日本プランクトン学会合同大会講演要旨集  2017
  • 眞野能, GUO Xinyu, 藤井直紀, 吉江直樹, 武岡英隆
    日本地球惑星科学連合大会予稿集(Web)  2017
  • 中川美和, GUO Xinyu, 吉江直樹
    日本地球惑星科学連合大会予稿集(Web)  2017
  • ITO Shin‐ichi, KOMATSU Kosei, KITAJIMA Satoshi, TAKASUKA Akinori, YOSHIE Naoki, OKUNISHI Takeshi, TAKAHASHI Motomitsu, HASEGAWA Toru, SETOU Takashi, YONEDA Michio
    日本地球惑星科学連合大会予稿集(Web)  2017
  • 眞野能, GUO X, 吉江直樹, 藤井直紀, 武岡英隆
    日本ベントス学会・日本プランクトン学会合同大会講演要旨集  2016/09
  • 吉江直樹, 中川美和, 武藤玲央, 小針統, 郭新宇
    日本海洋学会大会講演要旨集  2016/08
  • 伊藤進一, 小松幸生, 北島聡, 高須賀明典, 吉江直樹, 奥西武, 高橋素光, 長谷川徹, 瀬藤聡, 米田道夫
    日本海洋学会大会講演要旨集  2016/08
  • 長谷川大介, 堤英輔, 松野健, 千手智晴, 中村啓彦, 小針統, 仁科文子, 吉江直樹, 郭新宇
    日本海洋学会大会講演要旨集  2016/08
  • 奥西武, 金子仁, 伊藤幸彦, 纐纈慎也, 瀬藤聡, 黒田寛, 吉江直樹
    日本海洋学会大会講演要旨集  2016/08
  • 中川美和, 郭新宇, 吉江直樹
    日本海洋学会大会講演要旨集  2016/08
  • 伊藤進一, 小松幸生, 高須賀明典, 奥西武, 吉江直樹, 瀬藤聡, 亀田卓彦, 渡邉一功, 黒田寛
    日本海洋学会大会講演要旨集  2016/03
  • 久保田泰士, 郭新宇, 王玉成, 吉江直樹
    日本海洋学会大会講演要旨集  2016/03
  • 伊藤進一, 小松幸生, 北島聡, 高須賀明典, 吉江直樹, 奥西武, 高橋素光, 長谷川徹, 瀬藤聡, 米田道夫
    日本地球惑星科学連合大会予稿集(Web)  2016
  • 吉江直樹, 中川美和, 板尾和哉, 内田大貴, 武岡英隆
    瀬戸内海研究フォーラム  2016
  • 郭新宇, 于暁杰, 吉江直樹, 鬼塚剛, 武岡英隆
    瀬戸内海研究フォーラム  2016
  • 中川美和, 郭新宇, 吉江直樹
    瀬戸内海研究フォーラム  2016
  • 奥西武, 金子仁, 伊藤幸彦, 纐纈慎也, 瀬藤聡, 黒田寛, 吉江直樹
    日本海洋学会大会講演要旨集  2015/09
  • 小森田智大, 郭新宇, 吉江直樹, 武岡英隆, 藤井直紀
    日本海洋学会大会講演要旨集  2015/09
  • 中川美和, 郭新宇, 吉江直樹
    日本海洋学会大会講演要旨集  2015/09
  • 吉江直樹, 坂本航平, 中川美和, 佐藤業大, 堤英輔
    水産海洋研究  2015/08
  • 吉江直樹, 佐藤業大, 中川美和, 堤英輔
    日本海洋学会大会講演要旨集  2015/03
  • 眞野能, 郭新宇, 藤井直紀, 吉江直樹, 武岡英隆
    日本海洋学会大会講演要旨集  2015/03
  • 堤英輔, 郭新宇, 久保田祥隆, 吉江直樹, 武岡英隆
    日本海洋学会大会講演要旨集  2015/03
  • 吉田尚郁, りゅう茜, 張勁, 森本昭彦, 石坂丞二, 伊藤雅, 広瀬直毅, 高山勝巳, 郭新宇, 吉江直樹
    日本海洋学会大会講演要旨集  2015/03
  • 渡邉一功, 伊藤進一, 小松幸生, 高須賀明典, 奥西武, 吉江直樹, 瀬藤聡, 亀田卓彦, 黒田寛
    水産海洋学会研究発表大会講演要旨集  2015
  • 伊藤進一, 小松幸生, 高須賀明典, 吉江直樹, 奥西武, 北島聡, 高橋素光, 長谷川徹, 瀬藤聡
    日本地球惑星科学連合大会予稿集(Web)  2015
  • 吉江直樹, GUO Xinyu, WANG Yucheng, 久保田泰士
    日本地球惑星科学連合大会予稿集(Web)  2015
  • 伊藤進一, 小松幸生, 高須賀明典, 奥西武, 吉江直樹, 瀬藤聡, 亀田卓彦, 渡邉一功, 黒田寛
    水産海洋学会研究発表大会講演要旨集  2015
  • 眞野能, 郭新宇, 藤井直紀, 吉江直樹, 武岡英隆
    日本海洋学会大会講演要旨集  2014/09
  • 堤英輔, 郭新宇, 吉江直樹, 松野健, 眞野能, 中川美和
    日本海洋学会大会講演要旨集  2014/09
  • 小森田智大, 郭新宇, 藤井直紀, 吉江直樹, 武岡英隆
    水産海洋研究  2014/05
  • GUO Xinyu, 中川美和, 石睿, 吉江直樹, 堤英輔, 眞野能, 岩崎慎介, 笠毛健生
    日本気象学会大会講演予稿集  2013/10
  • 中川美和, 郭新宇, 石睿, 吉江直樹, 堤英輔, 眞野能, 岩崎慎介, 笠毛健生
    日本海洋学会大会講演要旨集  2013/08
  • 吉江直樹, 豊川将平, 石丸梨香, 堤英輔
    日本海洋学会大会講演要旨集  2013/08
  • 坂本航平, 吉江直樹, 中川美和
    日本海洋学会大会講演要旨集  2013/08
  • 高部由季, 鈴木翔太郎, 浜崎恒二, 吉江直樹, 横川太一, 鈴木聡
    日本海洋学会大会講演要旨集  2013/03
  • 吉江直樹, 坂本航平, 中川美和, 新田徹, 高部由季, 堤英輔
    日本海洋学会大会講演要旨集  2013/03
  • 堤英輔, 郭新宇, 吉江直樹, 武岡英隆, 松野健
    日本海洋学会大会講演要旨集  2013/03
  • 郭 新宇, 中川 美和, 石 睿, 吉江 直樹, 堤 英輔, 眞野 能, 岩崎 慎介, 笠毛 健生
    大会講演予講集  2013
  • 小森田智大, 吉江直樹, 藤井直紀, 郭新宇, 横川太一, 濱岡秀樹, 磯辺篤彦
    日本海洋学会大会講演要旨集  2012/03
  • 吉江直樹, 藤井直紀, 奥田悠太, 園本拓彬, 郭新宇, 小森田智大, 磯辺篤彦
    日本海洋学会大会講演要旨集  2012/03
  • 藤井直紀, 郭新宇, 吉江直樹, 小森田智大, 武岡英隆
    日本海洋学会大会講演要旨集  2011/09
  • 吉江直樹, 藤井直紀, 郭新宇, 小森田智大, 磯辺篤彦
    日本海洋学会大会講演要旨集  2011/09
  • 守屋和佳, 加三千宣, 山本正伸, 國弘忠生, 大西秀次郎, 齋藤光代, 濱岡秀樹, 佐川拓也, 柴田淳也, 藤井直紀, 吉江直樹, 大森浩二, 武岡英隆
    日本古生物学会年会講演予稿集  2011/06
  • 吉江直樹, 藤井直紀, 郭新宇, 小森田智大, 磯辺篤彦
    日本海洋学会大会講演要旨集  2011/03
  • 藤井直紀, 泉山佳啓, 郭新宇, 小森田智大, 吉江直樹, 武岡英隆, 磯辺篤彦
    日本海洋学会大会講演要旨集  2011/03
  • 鈴木光次, 桑田晃, 吉江直樹, 柴田晃, 川延京子, 齊藤宏明
    日本海洋学会大会講演要旨集  2011/03
  • 小森田智大, 郭新宇, 藤井直紀, 吉江直樹, 武岡英隆
    日本海洋学会大会講演要旨集  2011/03
  • 重光雅仁, 奥西武, 西岡純, 須股浩, 橋岡豪人, 相田真希, SMITH S.L, 吉江直樹, 山中康裕
    日本海洋学会大会講演要旨集  2010/08
  • 磯辺篤彦, 郭新宇, 吉江直樹, 藤井直紀, CHANG K. H, MILLER Todd, 大西秀次郎, 小森田智大, 二村彰
    日本海洋学会大会講演要旨集  2010/08
  • 吉江直樹, 藤井直紀, 小森田智大, 郭新宇, 武岡英隆
    日本海洋学会大会講演要旨集  2010/03
  • 藤井直紀, 郭新宇, 小森田智大, 吉江直樹, 武岡英隆
    日本海洋学会大会講演要旨集  2010/03
  • 小森田智大, 郭新宇, 藤井直紀, 吉江直樹, 國弘忠生, 武岡英隆
    日本海洋学会大会講演要旨集  2010/03
  • 郭新宇, 藤井直紀, 小森田智大, 吉江直樹, 武岡英隆
    日本海洋学会大会講演要旨集  2010/03
  • 中町美和, 吉江直樹, 近藤能子, 桑田晃, 清水勇吾, 高橋一生, 齊藤宏明
    日本海洋学会大会講演要旨集  2010/03
  • 須股浩, 橋岡豪人, 岡田直資, 相田真希, 吉江直樹, 坂本天, 鈴木立郎, 山中康裕
    日本海洋学会大会講演要旨集  2009/09
  • 奥西武, 吉江直樹, 須股浩, 重光雅仁, 橋岡豪人, 山中康裕, 伊藤進一
    日本海洋学会大会講演要旨集  2009/09
  • 奥西武, 伊藤進一, 吉江直樹, 山中康裕, 須股浩, 屋良由美子, 橋岡豪人, 坂本天
    日本海洋学会大会講演要旨集  2009/03
  • 須股浩, 橋岡豪人, 岡田直資, 相田真希, 吉江直樹, 坂本天, 鈴木立郎, 山中康裕
    日本海洋学会大会講演要旨集  2009/03
  • 吉江直樹, 伊藤進一, 小松幸生, 奥西武, 小埜恒夫, 田所和明, 日高清隆, 長谷川徹, 齊藤宏明, 山中康裕
    日本海洋学会大会講演要旨集  2009/03
  • Okunishi. T, S. Ito, N. Yoshie, Y. Yamanaka, H. Sumata, Y. Yara, T. Hashioka, and T. Sakamoto: Impacts of climate change on growth and migration of Japanese sardine (Sardinops melanostictus) in the western North Pacific  [Not invited]
    3rd GLOBEC Ocean Science Meeting, Victoria, Canada  2009
  • Sumata, H., T. Hashioka, N. Okada, M. Aita, N. Yoshie, T. Sakamoto, T. Suzuki, and Y. Yamanaka: Eddy Permitting Simulations of 3D-NEMURO in the Global Ocean  [Not invited]
    3rd GLOBEC Ocean Science Meeting, Victoria, Canada  2009
  • Yoshie, N., S. Ito, K. Komatsu, T. Okunishi, T. Ono, K. Tadokoro, K. Hidaka, T. Hasegawa, H. Saito and Y. Yamanaka: Structure and dynamics of marine ecosystem in the 5 regions around Japan simulated by a marine ecosystem model  [Not invited]
    3rd GLOBEC Ocean Science Meeting, Victoria, Canada  2009
  • Okunishi. T, S. Ito, N. Yoshie, Y. Yamanaka, H. Sumata, Y. Yara, T. Hashioka, and T. Sakamoto: Impacts of climate change on growth and migration of Japanese sardine (Sardinops melanostictus) in the western North Pacific  [Not invited]
    3rd GLOBEC Ocean Science Meeting, Victoria, Canada  2009
  • Sumata, H., T. Hashioka, N. Okada, M. Aita, N. Yoshie, T. Sakamoto, T. Suzuki, and Y. Yamanaka: Eddy Permitting Simulations of 3D-NEMURO in the Global Ocean  [Not invited]
    3rd GLOBEC Ocean Science Meeting, Victoria, Canada  2009
  • Yoshie, N., S. Ito, K. Komatsu, T. Okunishi, T. Ono, K. Tadokoro, K. Hidaka, T. Hasegawa, H. Saito and Y. Yamanaka: Structure and dynamics of marine ecosystem in the 5 regions around Japan simulated by a marine ecosystem model  [Not invited]
    3rd GLOBEC Ocean Science Meeting, Victoria, Canada  2009
  • 伊藤進一, 吉江直樹, 小埜恒夫, 岡崎雄二
    日本海洋学会大会講演要旨集  2008/09
  • 齊藤宏明, 吉江直樹, 桑田晃
    日本海洋学会大会講演要旨集  2008/03
  • 吉江直樹, 小松幸生, 伊藤進一, 小埜恒夫, 田所和明, 齊藤宏明, 山中康裕
    日本海洋学会大会講演要旨集  2008/03
  • 奥西武, 伊藤進一, 吉江直樹, 山中康裕, 須股浩, 橋岡豪人
    水産海洋学会研究発表大会講演要旨集  2008
  • 吉江直樹, 伊藤進一, 小松幸生, 亀田卓彦, 小埜恒夫, 清水勇吾, 筧茂穂, 田所和明, 齊藤宏明, 山中康裕: 親潮生態系の動態解明に向けて -生態系モデルからのアプローチ-  [Not invited]
    東京大学海洋研究所共同利用研究集会 「水塊構造の時空間変動と高頻度連続観測による親潮生態系の動態解明」, 東京  2008
  • 須股浩, 橋岡豪人, 坂本天, 鈴木立郎, 石田明生, 相田真希, 吉江直樹, 奥西武, 山中康裕: 渦許容全球海洋モデルによる低次生態系再現実験  [Not invited]
    第8回海洋生態系モデリング研究会, 札幌  2008
  • 奥西武, 橋岡豪人, 須股浩, 吉江直樹, 伊藤進一, 山中康裕, 坂本天: マイワシ回遊モデルの開発と 過去・未来のモデル解析  [Not invited]
    第8回海洋生態系モデリング研究会, 札幌  2008
  • 伊藤進一, 吉江直樹, 小埜恒夫, 岡崎雄二, 奥西武, 橋岡豪人, A-lineチーム: 海洋生態系モデルNEMUROの最適パラメータ推定  [Not invited]
    第8回海洋生態系モデリング研究会, 札幌  2008
  • 吉江直樹, 山中康裕: eNEMUROはどの程度日本周辺の生態系を再現できているか  [Not invited]
    第8回海洋生態系モデリング研究会, 札幌  2008
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Multi-element ecosystem dynamics in the SERIES iron-enrichment experiment: comparing fixed – and variable- composition versions of the NEMURO ecosystem model  [Not invited]
    Ocean Science Meeting 2008, Orlando, USA  2008
  • Yoshie, N., K. Komatsu, S. Ito, T. Ono, K. Tadokoro, H. Saito and Y. Yamanaka: Seasonal and interannual variation of marine ecosystem in the western subarctic Pacific simulated by a 3D marine ecosystem model  [Not invited]
    Effects of climate changes on the world oceans international symposium, Gijon, Spain  2008
  • Yoshie, N., K. Suzuki, A. Kuwata, J. Nishioka, and H. Saito: Temporal and spatial variations of phytoplankton photosynthetic physiology in the western subarctic Pacific in spring  [Not invited]
    Ocean Science Meeting 2008, Orlando, USA  2008
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Multi-element ecosystem dynamics in the SERIES iron-enrichment experiment: comparing optimal uptake kinetics to michaelis-menten  [Not invited]
    Advances in Marine Ecosystem Modelling Research 2008, Plymouth, UK  2008
  • Okunishi, T., S. Ito, N. Yoshie, T. Hashioka, H. Sumata, Y. Yamanaka: The impact of density-dependent processes on growth of Japanese sardine (Sardinops melanostictus)  [Not invited]
    PICES 17th Annual Meeting, Dalian, China  2008
  • Yamanaka, Y., T. Hashioka, T. Okunishi, H. Sumata, T. Sakamoto, M. N. Aita, N. Yoshie, N. Okada, S. Ito: Recent results connecting climate change to fish resources using the high resolution model, COCO-NEMURO  [Not invited]
    PICES 17th Annual Meeting, Dalian, China  2008
  • Yamanaka, Y., N. Yoshie, M. N. Aita, T. Hashioka, H. Sumata, N. Okada, T. Okunishi and S. Ito: Observational data for determining physiological parameters and validating model simulations: Suggestions by NEMURO developers  [Not invited]
    PICES 17th Annual Meeting, Dalian, China  2008
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Multi-element ecosystem dynamics in the SERIES iron-enrichment experiment: comparing fixed – and variable- composition versions of the NEMURO ecosystem model  [Not invited]
    Ocean Science Meeting 2008, Orlando, USA  2008
  • Yoshie, N., K. Komatsu, S. Ito, T. Ono, K. Tadokoro, H. Saito and Y. Yamanaka: Seasonal and interannual variation of marine ecosystem in the western subarctic Pacific simulated by a 3D marine ecosystem model  [Not invited]
    Effects of climate changes on the world oceans international symposium, Gijon, Spain  2008
  • Yoshie, N., K. Suzuki, A. Kuwata, J. Nishioka, and H. Saito: Temporal and spatial variations of phytoplankton photosynthetic physiology in the western subarctic Pacific in spring  [Not invited]
    Ocean Science Meeting 2008, Orlando, USA  2008
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Multi-element ecosystem dynamics in the SERIES iron-enrichment experiment: comparing optimal uptake kinetics to michaelis-menten  [Not invited]
    Advances in Marine Ecosystem Modelling Research 2008, Plymouth, UK  2008
  • Okunishi, T., S. Ito, N. Yoshie, T. Hashioka, H. Sumata, Y. Yamanaka: The impact of density-dependent processes on growth of Japanese sardine (Sardinops melanostictus)  [Not invited]
    PICES 17th Annual Meeting, Dalian, China  2008
  • Yamanaka, Y., T. Hashioka, T. Okunishi, H. Sumata, T. Sakamoto, M. N. Aita, N. Yoshie, N. Okada, S. Ito: Recent results connecting climate change to fish resources using the high resolution model, COCO-NEMURO  [Not invited]
    PICES 17th Annual Meeting, Dalian, China  2008
  • Yamanaka, Y., N. Yoshie, M. N. Aita, T. Hashioka, H. Sumata, N. Okada, T. Okunishi and S. Ito: Observational data for determining physiological parameters and validating model simulations: Suggestions by NEMURO developers  [Not invited]
    PICES 17th Annual Meeting, Dalian, China  2008
  • 吉江直樹, 鈴木光次, 桑田晃, 齊藤宏明
    日本海洋学会大会講演要旨集  2007/03
  • 伊藤進一, 吉江直樹, 岸道郎
    水産海洋学会研究発表大会講演要旨集  2007
  • 吉江直樹: 次世代生態系モデルに必要な観測とは?  [Not invited]
    第一回 海洋生態系モデリング・モニタリング研究会, 塩釜  2007
  • 吉江直樹, 鈴木光次, 桑田晃, 齊藤宏明: 春季の西部北太平洋亜寒帯域における 光合成特性の時空間変動  [Not invited]
    第7回海洋生態系モデリング研究会, 札幌  2007
  • 吉江直樹, 山中康裕, 鵜野伊津志, 相田真希: 気象擾乱による大気-海洋系物質循環および海洋生態系の応答  [Not invited]
    第2回特定領域研究「大気海洋物質循環」全体会議, 熊谷  2007
  • Yamanaka, Y., T. Hashioka, M. N. Aita, F. Shido, N. Yoshie: An integrated physical-biogeochemical-ecosystem model including pelagic fish dynamics, to study changes in ecosystem and pelagic fish in the western North Pacific associated with global warming  [Not invited]
    International Symposium on 'Parameterization of Trophic Interactions in Ecosystem Modelling', Cadiz, Spain  2007
  • Ito, S., K. A. Rose, N. Yoshie, B. A. Megrey, M. J. Kishi, and F. E. Werner: Evaluation of an automated calibration approach for calibrating the NEMURO nutrient-phytoplankton-zooplankton food web model  [Not invited]
    International Zooplankton Symposium, Hiroshima, Japan  2007
  • Yamanaka, Y., N. Yoshie, K. Sato, J. Nishioka: An iron cycle model coupled with an ecosystem model, NEMURO  [Not invited]
    GEOTRACES Data-Model Synergy Workshop, Delmenhorst, Germany  2007
  • Yokouchi, K., T. Kameda, K. Komatsu, S. Ito and N. Yoshie: Application for fisheries-Satellite observations for sustainable fisheries-  [Not invited]
    2007 AMSR/GLI workshop, Tsukuba, Japan  2007
  • Yoshie, N.: Development and applications of an ecosystem model reproducing complex marine ecosystems around Japan  [Not invited]
    COE program symposium 2007-Prediction and avoidance of an abrupt change in the biogeosphere system, Sapporo, Japan  2007
  • Yoshie, N.: Development of eNEMURO with 4 zooplankton collaborated with monitoring teams  [Not invited]
    6th Workshop of the Dynamic Green Ocean Project, Villefranche-sur-mer, France  2007
  • Yoshie, N.: Applications of marine ecosystem model to the mesoscale iron fertilization experiments in the subarctic Pacific  [Not invited]
    International meeting for biogeochemical modeling in the IAEA-MEL, Monaco  2007
  • Yoshie, N., H. Saito, K. Komatsu, and S. Ito: IMBER-JAPAN related programs “Population outbreak of marine life” and “Global Warming project”  [Not invited]
    GODAE-IMBER Task Team meeting, Paris, France  2007
  • Ito, S., K. A. Rose, N. Yoshie, B. A. Megrey, M. J. Kishi, and F. E. Werner: Evaluation of an automated approach for calibrating the NEMURO nutrient-phytoplankton-zooplankton food web model  [Not invited]
    PICES 16th Annual Meeting, Victoria, Canada  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Comparing Optimal Uptake Kinetics and Michaelis-Menten by Assimilating Data from the SERIES Fe-Enrichment Experiment into a Marine Ecosystem Model  [Not invited]
    The 6th European Conference on Ecological Modelling, Trieste, Italy  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Introduction of the SPONGE and QeNEMURO and Application to the SERIES iron-enrichment experiment  [Not invited]
    IfM-GEOMAR seminar, Kiel, Germany  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Introduction of the SPONGE and QeNEMURO and Application to the SERIES iron-enrichment experiment  [Not invited]
    GKSS formal seminar, Geesthacht, Germany  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Introduction of the SPONGE and QeNEMURO and Application to the SERIES iron-enrichment experiment  [Not invited]
    AWI formal seminar, Bremerhaven, Germany  2007
  • 5. Yamanaka, Y., T. Hashioka, M. N. Aita, F. Shido, N. Yoshie: An integrated physical-biogeochemical-ecosystem model including pelagic fish dynamics, to study changes in ecosystem and pelagic fish in the western North Pacific associated with global war・・・  [Not invited]
    International Symposium on 'Parameterization of Trophic Interactions in Ecosystem Modelling', Cadiz, Spain  2007 
    5. Yamanaka, Y., T. Hashioka, M. N. Aita, F. Shido, N. Yoshie: An integrated physical-biogeochemical-ecosystem model including pelagic fish dynamics, to study changes in ecosystem and pelagic fish in the western North Pacific associated with global warming
  • Ito, S., K. A. Rose, N. Yoshie, B. A. Megrey, M. J. Kishi, and F. E. Werner: Evaluation of an automated calibration approach for calibrating the NEMURO nutrient-phytoplankton-zooplankton food web model  [Not invited]
    International Zooplankton Symposium, Hiroshima, Japan  2007
  • Yamanaka, Y., N. Yoshie, K. Sato, J. Nishioka: An iron cycle model coupled with an ecosystem model, NEMURO  [Not invited]
    GEOTRACES Data-Model Synergy Workshop, Delmenhorst, Germany  2007
  • Yokouchi, K., T. Kameda, K. Komatsu, S. Ito and N. Yoshie: Application for fisheries-Satellite observations for sustainable fisheries-  [Not invited]
    2007 AMSR/GLI workshop, Tsukuba, Japan  2007
  • Yoshie, N.: Development and applications of an ecosystem model reproducing complex marine ecosystems around Japan  [Not invited]
    COE program symposium 2007-Prediction and avoidance of an abrupt change in the biogeosphere system, Sapporo, Japan  2007
  • Yoshie, N.: Development of eNEMURO with 4 zooplankton collaborated with monitoring teams  [Not invited]
    6th Workshop of the Dynamic Green Ocean Project, Villefranche-sur-mer, France  2007
  • Yoshie, N.: Applications of marine ecosystem model to the mesoscale iron fertilization experiments in the subarctic Pacific  [Not invited]
    International meeting for biogeochemical modeling in the IAEA-MEL, Monaco  2007
  • Yoshie, N., H. Saito, K. Komatsu, and S. Ito: IMBER-JAPAN related programs “Population outbreak of marine life” and “Global Warming project”  [Not invited]
    GODAE-IMBER Task Team meeting, Paris, France  2007
  • Ito, S., K. A. Rose, N. Yoshie, B. A. Megrey, M. J. Kishi, and F. E. Werner: Evaluation of an automated approach for calibrating the NEMURO nutrient-phytoplankton-zooplankton food web model  [Not invited]
    PICES 16th Annual Meeting, Victoria, Canada  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Comparing Optimal Uptake Kinetics and Michaelis-Menten by Assimilating Data from the SERIES Fe-Enrichment Experiment into a Marine Ecosystem Model  [Not invited]
    The 6th European Conference on Ecological Modelling, Trieste, Italy  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Introduction of the SPONGE and QeNEMURO and Application to the SERIES iron-enrichment experiment  [Not invited]
    IfM-GEOMAR seminar, Kiel, Germany  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Introduction of the SPONGE and QeNEMURO and Application to the SERIES iron-enrichment experiment  [Not invited]
    GKSS formal seminar, Geesthacht, Germany  2007
  • Smith S. L., N. Yoshie, and Y. Yamanaka: Introduction of the SPONGE and QeNEMURO and Application to the SERIES iron-enrichment experiment  [Not invited]
    AWI formal seminar, Bremerhaven, Germany  2007
  • 吉江直樹: 海洋低次生態系モデル“eNEMURO”の話を中心に  [Not invited]
    第6回2006年度海洋生態系モデリング研究会, 登別  2006
  • 吉江直樹、山中康裕、橋岡豪人、藤井賢彦: モデル研究の立場から  [Not invited]
    2006年度日本海洋学会秋季大会, 名古屋  2006
  • 吉江直樹: 海洋生態系モデルの開発と中規模鉄散布実験や日本周辺海域への応用  [Not invited]
    第19回2006年度海洋物質循環セミナー, 苫小牧  2006
  • 23. Yoshie, N. S. Takeda, P. W. Boyd and Y. Yamanaka: Modelling studies investigating the causes of preferential depletion of silicic acid relative to nitrate during SERIES: a mesoscale iron-enrichment in the NE subarctic Pacific  [Not invited]
    2006 Ocean Science Meeting, Hawaii, USA  2006
  • Yoshie, N. S. Takeda, P. W. Boyd and Y. Yamanaka: Modelling studies investigating the causes of preferential depletion of silicic acid relative to nitrate during SERIES: a mesoscale iron-enrichment in the NE subarctic Pacific  [Not invited]
    CREAMS/PICES international workshop on model/data intercomparison for the Japan/East Sea, Busan, Korea  2006
  • Yoshie, N. and Y. Yamanaka: Development of a lower trophic ecosystem model representing prey of juvenile pelagic fish in the subtropical western North Pacific  [Not invited]
    PICES 15th Annual Meeting, Yokohama, Japan  2006
  • Yoshie, N., K. Sato, Y. Yamanaka and J. Nishioka: Introduction of iron cycles into a lower trophic level marine ecosystem model, NEMURO  [Not invited]
    PICES 15th Annual Meeting, Yokohama, Japan  2006
  • Yoshie, N., M. N. Aita and Y. Yamanaka: Applications of low trophic level ecosystem model in the western North Pacific  [Not invited]
    International workshop of collaborative studies for ecosystem variation and climate change in the North Pacific, Yokohama, Japan  2006
  • Yoshie, N. S. Takeda, P. W. Boyd and Y. Yamanaka: Modelling studies investigating the causes of preferential depletion of silicic acid relative to nitrate during SERIES: a mesoscale iron-enrichment in the NE subarctic Pacific  [Not invited]
    2006 Ocean Science Meeting, Hawaii, USA  2006
  • Yoshie, N. S. Takeda, P. W. Boyd and Y. Yamanaka: Modelling studies investigating the causes of preferential depletion of silicic acid relative to nitrate during SERIES: a mesoscale iron-enrichment in the NE subarctic Pacific  [Not invited]
    CREAMS/PICES international workshop on model/data intercomparison for the Japan/East Sea, Busan, Korea  2006
  • Yoshie, N. and Y. Yamanaka: Development of a lower trophic ecosystem model representing prey of juvenile pelagic fish in the subtropical western North Pacific  [Not invited]
    PICES 15th Annual Meeting, Yokohama, Japan  2006
  • Yoshie, N., K. Sato, Y. Yamanaka and J. Nishioka: Introduction of iron cycles into a lower trophic level marine ecosystem model, NEMURO  [Not invited]
    PICES 15th Annual Meeting, Yokohama, Japan  2006
  • Yoshie, N., M. N. Aita and Y. Yamanaka: Applications of low trophic level ecosystem model in the western North Pacific  [Not invited]
    International workshop of collaborative studies for ecosystem variation and climate change in the North Pacific, Yokohama, Japan  2006
  • 吉江直樹, 鈴木光次, 斉藤宏明, 西岡純, 桑田晃, 小埜恒夫
    日本海洋学会大会講演要旨集  2005
  • 齋藤誠一, 山中康裕, 吉江直樹: 総合検証グループからの提言  [Not invited]
    大気・海洋間の生物地球化学的循環過程に関する総合的研究-北太平洋域における国際共同研究の提案-, 名古屋  2005
  • 吉江直樹: 海洋生態系モデル「拡張版NEMURO "eNEMURO"」の開発  [Not invited]
    第5回海洋生態系モデリング研究会, ニセコ  2005
  • 齊藤宏明, 近藤能子, 桑田晃, 西岡純, 小畑元, 小埜恒夫, 大木淳之, 柴田晃, 鈴木光次, 武田重信, 津田敦, 吉江直樹, 芳村毅: 親潮域春期ブルーム期の鉄の動態と生物応答  [Not invited]
    2005年度日本プランクトン学会シンポジウム, 東京  2005
  • 吉江直樹: 気候帯毎に異なる複雑な生態系を再現する生態系モデルの開発・応用  [Not invited]
    21世紀COEプログラム シンポジウム「生体地球圏システム激変の予測と回避」, 札幌  2005
  • Yoshie, N. and Y. Yamanaka: Processes causing the temporal changes in Si/N ratios of nutrient consumption and export flux during the spring diatom bloom  [Not invited]
    European Geosciences Union General Assembly, Vienna, Austria  2005
  • Yoshie, N. and Y. Yamanaka: Processes causing the temporal changes in Si/N ratios of nutrient consumptions and export flux during the spring diatom bloom  [Not invited]
    2005 American Society of Limnology and Oceanography (ASLO) summer meeting, Santiago de Compostela, Spain  2005
  • Yoshie, N., M. Fujii and Y. Yamanaka: Ecosystem changes with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    Advances in Marine Ecosystem Modeling Research (AMEMR), Plymouth, UK  2005
  • Yoshie, N.: Studies of intermediate complex marine ecosystem models  [Not invited]
    2005 SOLAS International summer school, Corsica, France  2005
  • Yoshie, N. and Y. Yamanaka: Modeling of biogeochemical iron cycle  [Not invited]
    PICES 14th Annual Meeting, Vladivostok, Russia  2005
  • Yoshie, N. and Y. Yamanaka: Processes causing the temporal changes in Si/N ratios of nutrient consumption and export flux during the spring diatom bloom  [Not invited]
    European Geosciences Union General Assembly, Vienna, Austria  2005
  • Yoshie, N. and Y. Yamanaka: Processes causing the temporal changes in Si/N ratios of nutrient consumptions and export flux during the spring diatom bloom  [Not invited]
    2005 American Society of Limnology and Oceanography (ASLO) summer meeting, Santiago de Compostela, Spain  2005
  • Yoshie, N., M. Fujii and Y. Yamanaka: Ecosystem changes with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    Advances in Marine Ecosystem Modeling Research (AMEMR), Plymouth, UK  2005
  • Yoshie, N.: Studies of intermediate complex marine ecosystem models  [Not invited]
    2005 SOLAS International summer school, Corsica, France  2005
  • Yoshie, N. and Y. Yamanaka: Modeling of biogeochemical iron cycle  [Not invited]
    PICES 14th Annual Meeting, Vladivostok, Russia  2005
  • 吉江直樹, 山中康裕
    日本海洋学会大会講演要旨集  2004/09
  • 吉江直樹, 山中康裕
    日本海洋学会大会講演要旨集  2004/03
  • 吉江直樹: 中規模鉄施肥実験SEEDSのモデリング  [Not invited]
    第4回海洋生態系モデリング研究会, 支笏湖  2004
  • 吉江直樹, 山中康裕: 気象擾乱による大気-海洋系物質循環および海洋生態系の応答  [Not invited]
    東京大学海洋研究所共同利用シンポジウム「大気・海洋間の生物地球化学的循環過程」, 東京  2004
  • 吉江直樹: 西部北太平洋のプランクトン群集の棲み分けとその要因  [Not invited]
    第17回海洋物質循環セミナー, 静岡  2004
  • Yoshie, N., M. Fujii and Y. Yamanaka: Changes of the ecosystem with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    ASLO/TOS ocean research conference, Hawaii, USA  2004
  • Yoshie, N., M. Fujii and Y. Yamanaka: Ecosystem changes with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    The 1st General Assembly of the European Geosciences Union, Nice, France  2004
  • Yoshie, N., M. Fujii and Y. Yamanaka: Ecosystem changes with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    2004 SOLAS open science conference, Halifax, Canada  2004
  • Fujii, M., N. Yoshie, Y. Yamanaka: and F. Chai: Simulated biogeochemical responses to iron enrichments in three high nutrient, low chlorophyll (HNLC) regions  [Not invited]
    2004 SOLAS open Science conference, Halifax, Canada  2004
  • Yamanaka, Y., N. Yoshie, T. Hashioka and M. J. Kishi: Extension of NEMURO to represent habitant segregation of plankton groups in the western North Pacific  [Not invited]
    PICES XI Annual Meeting, Honolulu, USA  2004
  • Yoshie, N., M. Fujii and Y. Yamanaka: Changes of the ecosystem with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    ASLO/TOS ocean research conference, Hawaii, USA  2004
  • Yoshie, N., M. Fujii and Y. Yamanaka: Ecosystem changes with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    The 1st General Assembly of the European Geosciences Union, Nice, France  2004
  • Yoshie, N., M. Fujii and Y. Yamanaka: Ecosystem changes with the iron fertilization in the western North Pacific simulated by a one-dimension ecosystem model  [Not invited]
    2004 SOLAS open science conference, Halifax, Canada  2004
  • Fujii, M., N. Yoshie, Y. Yamanaka: and F. Chai: Simulated biogeochemical responses to iron enrichments in three high nutrient, low chlorophyll (HNLC) regions  [Not invited]
    2004 SOLAS open Science conference, Halifax, Canada  2004
  • 9. Yamanaka, Y., N. Yoshie, T. Hashioka and M. J. Kishi: Extension of NEMURO to represent habitant segregation of plankton groups in the western North Pacific  [Not invited]
    PICES XI Annual Meeting, Honolulu, USA  2004
  • 吉江直樹: 植物プランクトン温度依存性の定式化に関する考察  [Not invited]
    第3回海洋生態系モデリング研究会, 札幌  2003
  • 山中康裕, 吉江直樹, 橋岡豪人: 生態系モデルによる輸出生産に関する考察  [Not invited]
    2003年度日本海洋学会春季大会, 東京  2003
  • 吉江直樹:生態系モデルにより再現された西部北太平洋における鉄散布に伴う生態系の変化  [Not invited]
    東京大学海洋研究所共同利用シンポジウム, 東京  2003
  • 吉江直樹: 生態系モデルで再現された西部北太平洋における鉄施肥に伴う生態系の変化  [Not invited]
    第16回海洋物質循環セミナー, 支笏湖  2003
  • Smith, S. L., N. Yoshie, C. Yoshikawa, M. Fujii, Y. Yamanaka and M. J. Kishi: Modeling coupled biogeochemistry and ecosystem dynamics at four stations in the North Pacific: Recent results from the FRSGC-HU Group  [Not invited]
    Final JGOFS Open Science Conference: "A Sea of Change: JGOFS accomplishments and the Future of Ocean Biogeochemistry", Washington DC, USA  2003
  • Yoshie, N., S. Ito, Y. Yamanaka and M. J. Kish: The simulation of saury population in western North Pacific using the PICES-NEMURO.FISH model  [Not invited]
    PICES MODEL workshop to Embed NEMURO and NEMURO.FISH into a 3-D circulation model, Yokohama  2003
  • Yoshie, N., S. Ito, Y. Yamanaka and M. J. Kish: Parameter sensitivity study of NEMURO  [Not invited]
    PICES model task team work shop "Summary and Synthesis of Contributions from NEMURO and NEMURO.FISH", Yokohama  2003
  • Smith, S. L., N. Yoshie, C. Yoshikawa, M. Fujii, Y. Yamanaka and M. J. Kishi: Modeling coupled biogeochemistry and ecosystem dynamics at four stations in the North Pacific: Recent results from the FRSGC-HU Group  [Not invited]
    Final JGOFS Open Science Conference: "A Sea of Change: JGOFS accomplishments and the Future of Ocean Biogeochemistry", Washington DC, USA  2003
  • Yoshie, N., S. Ito, Y. Yamanaka and M. J. Kish: The simulation of saury population in western North Pacific using the PICES-NEMURO.FISH model  [Not invited]
    PICES MODEL workshop to Embed NEMURO and NEMURO.FISH into a 3-D circulation model, Yokohama, Japan  2003
  • Yoshie, N., S. Ito, Y. Yamanaka and M. J. Kish: Parameter sensitivity study of NEMURO  [Not invited]
    PICES model task team work shop "Summary and Synthesis of Contributions from NEMURO and NEMURO.FISH", Yokohama, Japan  2003
  • 吉江直樹, 山中康裕, 岸道郎, 斉藤宏明
    日本海洋学会大会講演要旨集  2002/03
  • Yoshie, N. and Y. Yamanaka: Silicon/Nitrogen ratios in the spring diatom bloom  [Not invited]
    2002年度日本海洋学会秋季大会, 札幌  2002
  • 吉江直樹: 春季珪藻ブルームに関する生物過程とSi/N 比について~生態系モデルからのアプローチ~  [Not invited]
    第15回海洋物質循環セミナー, 筑波  2002
  • Yoshie, N. and Y. Yamanaka: Biological processes and silicon/nitrogen ratio relevant to the spring diatom bloom  [Not invited]
    International Symposium "Our Oceanography Toward The World Oceanography" at the XXVI SCOR General Meeting, Sapporo  2002
  • Yoshie, N., Y. Yamanaka and M. J. Kish: Including the fish compartment into the PICES NEMURO model  [Not invited]
    PICES MODEL/REX workshop to build an NPZF (nutrient - phytoplankton - zooplankton - fish) version of the PICES NEMURO model, Nemuro/Yokohama  2002
  • Yoshie, N. and Y. Yamanaka: Biological processes and silicon/nitrogen ratio relevant to the spring diatom bloom  [Not invited]
    International Symposium "Our Oceanography Toward The World Oceanography" at the XXVI SCOR General Meeting, Sapporo, Japan  2002
  • Yoshie, N., Y. Yamanaka and M. J. Kish: Including the fish compartment into the PICES NEMURO model  [Not invited]
    PICES MODEL/REX workshop to build an NPZF (nutrient - phytoplankton - zooplankton - fish) version of the PICES NEMURO model, Nemuro/Yokohama, Japan  2002
  • 吉江直樹, 山中康裕, 岸道郎, 斉藤宏明: 生態系モデルを用いた珪藻類のケイ素利用に関する考察  [Not invited]
    2001年度日本海洋学会春季大会, 東京  2001
  • 吉江直樹, 山中康裕, 岸道郎, 斉藤宏明
    日本海洋学会大会講演要旨集  2000/09
  • 山中康裕, 藤井賢彦, 吉江直樹, 岸道郎, 相田(野口)真希
    日本海洋学会大会講演要旨集  2000/09
  • 吉江直樹: 石狩湾基礎生産量推定モデルについて  [Not invited]
    海洋基礎生産のモデリングに関するワークショップ(名古屋大学大気水圏科学研究所 共同利用研究集会), 名古屋  2000
  • Yoshie, N., Y. Yamanaka, M. Fujii and M. J. Kishi: Development of 11 compartments marine ecosystem box model  [Not invited]
    International Workshop to Develop a Prototype Lower Trophic Level Ecosystem Model for Comparison of Different Marine Ecosystems in the North Pacific, Nemuro  2000
  • Yoshie, N., Y. Yamanaka, M. Fujii and M. J. Kishi: Development of 11 compartments marine ecosystem box model  [Not invited]
    International Workshop to Develop a Prototype Lower Trophic Level Ecosystem Model for Comparison of Different Marine Ecosystems in the North Pacific, Nemuro, Japan  2000
  • SHIN K H, 乗木新一郎, 浜健夫, 吉江直樹, 松原望美, 角皆静男
    日本地球化学会年会講演要旨集  1998/10
  • 乗木新一郎, 松原望美, 吉江直樹, SHIN K‐H
    日本地球化学会年会講演要旨集  1998/10
  • 乗木新一郎, 吉江直樹, 申けい勲, 渡辺智視, 田中伊織, 浜健夫
    日本海洋学会大会講演要旨集  1998
  • 乗木新一郎, 吉江直樹, 申き勲, 松原望美, 渡辺智視, 田中伊織, 浜健夫
    日本海洋学会大会講演要旨集  1998
  • Yoshie, N., K. H. Shin and S. Noriki: Seasonal variation of primary production in the Western North Pacific  [Not invited]
    1998年度北東ユーラシア・北太平洋の地域総合研究 成果報告シンポジウム, 札幌  1998
  • 乗木新一郎, 吉江直樹, 申けい勲, 渡辺智視, 田中伊織, 浜健夫
    日本海洋学会大会講演要旨集  1997
  • 申けい勲, 浜健夫, 吉江直樹, 乗木新一郎, 角皆静男
    日本海洋学会大会講演要旨集  1997

MISC

Awards & Honors

  • 2019/02 三浦保環境賞実行委員会 三浦保環境賞特別賞
     海の環境予報を創る 
    受賞者: 吉江 直樹
  • 2011/10 PICES Best Presentation Award
     Phytoplankton and nutrient dynamics in the western Seto Inland Sea, Japan based on observation and a modified NEMURO model 
    受賞者: YOSHIE Naoki
  • 2010/03 日本海洋学会 岡田賞
     モデルを用いた海洋プランクトン動態およびその物質循環における機能の解明 
    受賞者: 吉江 直樹
  • 1999/03 北海道大学 Matsuno Award
     Seasonal variations of primary productivity and Chl.a-specific productivity in the western North Pacific. 
    受賞者: 吉江 直樹

Research Grants & Projects

  • 超高解像度観測と数値モデルを組み合わせた沿岸域における栄養塩動態の解明
    日本学術振興会科学研究費補助金基盤B:
    Date (from‐to) : 2017/04 -2021/03 
    Author : 吉江 直樹
  • 東シナ海におけるサブメソスケール渦が海洋生態系に及ぼす影響の評価
    日本学術振興会科学研究費補助金:新学術領域公募研究
    Date (from‐to) : 2018/04 -2020/03 
    Author : 吉江 直樹
  • ローカルスケールの大気海洋相互作用が海洋生態系に及ぼす影響の評価
    日本学術振興会科学研究費補助金:新学術領域公募研究
    Date (from‐to) : 2013/04 -2015/03 
    Author : 吉江 直樹
  • 環境変化に対する沿岸生態系・物質循環の応答機構の解明
    日本学術振興会科学研究費補助金:若手研究B
    Date (from‐to) : 2011/04 -2014/03 
    Author : 吉江 直樹
  • 文部科学省:科学研究費補助金(新学術領域研究(研究領域提案型))
    Date (from‐to) : 2011/04 -2013/03 
    Author : 吉江直樹
  • 文部科学省:科学研究費補助金(若手研究(B))
    Date (from‐to) : 2005 -2006 
    Author : 吉江直樹

愛媛大学教員活動実績

教育活動(B)

担当授業科目(B01)

  • 2019, the first semester, under graduate, 地球科学野外研究
  • 2019, the first semester, under graduate, 海洋学通論
  • 2019, the first semester, master course, 地球科学高等実験Ⅰ
  • 2019, the first semester, master course, 地球科学高等実験Ⅴ
  • 2019, the first semester, master course, 地球科学フィールド高等実習Ⅰ
  • 2019, the first semester, master course, 地球科学フィールド高等実習Ⅲ
  • 2019, the first semester, master course, 地球科学プレゼンテーション特別実習Ⅰ
  • 2019, the first semester, master course, 地球科学プレゼンテーション特別実習Ⅲ
  • 2019, the first semester, master course, 地球科学ゼミナールⅢ
  • 2019, the first semester, master course, 地球科学プレゼンテーション特別実習Ⅱ
  • 2019, the first semester, master course, 地球科学フィールド高等実習Ⅱ
  • 2019, the first semester, master course, 地球科学高等実験Ⅲ
  • 2019, the first semester, under graduate, 海洋学通論
  • 2019, the first semester, under graduate, 地球科学野外研究


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