A5054798864- Marine and coastal ecosystems
- Isotope Analysis in Ecology
- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Geology and Paleoclimatology Research
- Ocean Acidification Effects and Responses
- Methane Hydrates and Related Phenomena
- Fish Ecology and Management Studies
- Geological and Geophysical Studies
- Marine Invertebrate Physiology and Ecology
- Climate variability and models
- Coastal and Marine Management
- Marine Toxins and Detection Methods
- Paleontology and Stratigraphy of Fossils
- Marine and environmental studies
- Marine Bivalve and Aquaculture Studies
- Geochemistry and Elemental Analysis
- Protist diversity and phylogeny
- Soil and Water Nutrient Dynamics
- Food Industry and Aquatic Biology
- Sustainability and Ecological Systems Analysis
- Land Use and Ecosystem Services
- Aquatic and Environmental Studies
Ehime University
2010-2022
Kyushu University
2019
Japan Fisheries Research and Education Agency
2006-2011
Japan Society for the Promotion of Science
2009
Hokkaido University
2000-2006
Abstract The Kuroshio Current carries a large amount of nutrients in dark subsurface layer along the southern coast Japan. However, due to lack sufficient multidisciplinary high‐resolution observations, it has been unclear whether and how are injected sunlit layers on continental shelf. In this study, using state‐of‐the‐art tow‐yo microstructure profiler nitrate measurements, we show that flowing shelfbreak induces very strong turbulent dissipation rate ∼O(10 −7 W·kg −1 ) diffusivity −3 m 2...
Abstract. The Kuroshio Current has been thought to be biologically unproductive because of its oligotrophic conditions and low plankton standing stocks. Even though vulnerable life stages major foraging fishes risk being entrapped by frontal eddies meanders encountering food availability, they have cycle strategies that include growing recruiting around the Current. Here we report phytoplankton growth consumption microzooplankton are stimulated turbulent nitrate flux amplified Oceanographic...
Abstract A two‐dimensional individual‐based fish movement model coupled with bioenergetics was developed to simulate the observed migration and growth of Japanese sardine ( Sardinops melanostictus ) in western North Pacific. In model, derived from ocean–environmental data as driving force, adapted a kinesis behavior. The successfully simulated transport patterns during egg larval stages northward migrations juvenile stage 2005, 2006 2007. results showed that both temperature Kuroshio...
Abstract Vertical nitrate fluxes associated with turbulent mixing and upwelling around a small reef in the Kuroshio are quantified by continuously deploying turbulence microstructure profiler an attached submersible ultraviolet analyzer while drifting from upstream to downstream of reef. Flow separations trains Kelvin‐Helmholtz billows (thickness = 60 m) identified using shipboard ADCP echo‐sounder. The diffusivity vigorous reaches up O (10 −1 m 2 s ), resulting strong (1–10 3 mmol −2 day )....
To investigate the iron cycle at Station A4 in Oyashio region of western subarctic Pacific, we developed a 1‐D ecosystem model consisting 14 components including cycle. The parameters associated with were optimized by assimilating monthly averaged data from time series observations for depth‐integrated net primary production, nitrate, silicate, dissolved and particulate within surface mixed layer (ML) two depths (200 300 m depth). successfully reproduced demonstrated that (1) on an annual...
Abstract Many migratory fishes reproduce and recruit around the Kuroshio, their survival of early life stages is supported by mesozooplankton. Mesozooplankton standing stocks productivity equivalent to those on continental shelf have been found in Kuroshio; however, there limited information trophic sources linkages support mesozooplankton community. Here, we evaluate feeding protists trophodynamics importance removal bottle experiments Kuroshio East China (ECS‐Kuroshio). Pico‐...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 399:39-52 (2010) - DOI: https://doi.org/10.3354/meps08329 Temporal and spatial variations in photosynthetic physiology of diatoms during spring bloom western subarctic Pacific Naoki Yoshie1,2,3,*, Koji Suzuki4, Akira Kuwata2, Jun Nishioka5, Hiroaki Saito2 1Division Coastal Oceanography, Center for...
Anthropogenic and/or climate-driven changes in zooplankton dynamics may serve as a bottom-up regulator of productivity small pelagic fish. In the central Seto Inland Sea Japan, abundance recruit fish Japanese anchovy (Engraulis japonicus) has markedly declined last decade under oligotrophication. However, link between reproductive success and environmental variation is largely unclear. This study explored potential association (copepods) community structure condition this oligotrophic sea...