Akira Umehara

发表

Organic matter degradation characteristics of coastal marine sediments collected from the Seto Inland Sea, Japan

H. Okamura, N. Fujitake, W. Jadoon, 2020 .

ENERGY TRANSFER EFFICIENCIES ON LOWER TROPHIC LEVELS WITH INTENSIVE OYSTER FARMING IN HIROSHIMA BAY, JAPAN

T. Okuda, Hironori Yamamoto, S. Nakai, 2017 .

Annual dynamics of benthic primary production by macrophytes on a sand flat in the eutrophic Hiroshima Bay, Japan

T. Okuda, S. Nakai, W. Nishijima, 2020 .

Spatial and temporal distributions of Secchi depths and chlorophyll a concentrations in the Suo Nada of the Seto Inland Sea, Japan, exposed to anthropogenic nutrient loading.

T. Okuda, S. Nakai, W. Nishijima, 2016, The Science of the total environment.

Estimation of spatial distribution of coastal ocean primary production in Hiroshima Bay, Japan, with a geostationary ocean color satellite

W. Nishijima, J. Ishizaka, S. Asaoka, 2020 .

Impact of eelgrass bed recovery and expansion on phytoplankton growth through nutrient competition.

Feng Wang, S. Nakai, W. Nishijima, 2020, Journal of environmental management.

Diffusion of microcystins (cyanobacteria hepatotoxins) from the reservoir of Isahaya Bay, Japan, into the marine and surrounding ecosystems as a result of large-scale drainage.

Tohru Takahashi, Akira Umehara, H. Tsutsumi, 2014, Marine pollution bulletin.

Historical changes in primary production in the Seto Inland Sea, Japan, after implementing regulations to control the pollutant loads

T. Okuda, S. Nakai, W. Nishijima, 2018 .

Responses of the benthic environment to reduction in anthropogenic nutrient loading in the Seto Inland Sea (Japan), based on M-AMBI assessment.

Á. Borja, S. Nakai, W. Nishijima, 2021, Marine environmental research.

Widespread dispersal and bio-accumulation of toxic microcystins in benthic marine ecosystems.

Tohru Takahashi, Akira Umehara, Ho-Dong Park, 2017, Chemosphere.

Short-term dynamics of cyanobacterial toxins (microcystins) following a discharge from a coastal reservoir in Isahaya Bay, Japan.

Tohru Takahashi, Akira Umehara, A. Tai, 2015, Marine pollution bulletin.

Temporal distribution of primary and secondary production estimated from water quality data in the Seto Inland Sea, Japan

T. Okuda, Feng Wang, S. Nakai, 2021 .

Benthic quality assessment using M-AMBI in the Seto Inland Sea, Japan.

T. Okuda, S. Nakai, W. Nishijima, 2019, Marine environmental research.

Long-term Assessment of the Environmental Conditions of Lake Nakaumi (Japan) Using Multivariate AZTI Marine Biotic Index (M-AMBI)

W. Nishijima, Akira Umehara, Takatoshi Fujii, 2019, Journal of Water and Environment Technology.

Spatial distribution of hydrogen sulfide and sulfur species in coastal marine sediments Hiroshima Bay, Japan.

T. Okuda, H. Shibata, S. Nakai, 2018, Marine pollution bulletin.

Biological productivity evaluation at lower trophic levels with intensive Pacific oyster farming of Crassostrea gigas in Hiroshima Bay, Japan

T. Okuda, Hironori Yamamoto, S. Nakai, 2018, Aquaculture.

Species diversity of the marine diatom genus Skeletonema in Japanese brackish water areas

Akira Umehara, M. Kodama, Kazumaro Okamura, 2013, Fisheries Science.

Implications of changes in the benthic environment and decline of macro-benthic communities in the inner part of Ariake Bay in relation to seasonal hypoxia

Tohru Takahashi, Akira Umehara, A. Takamatsu, 2015 .

Valorization of Solid Food Waste as a Source of Polyunsaturated Fatty Acids Using Aurantiochytrium sp. L3W

S. Nakai, W. Nishijima, Akira Umehara, 2023, Waste and Biomass Valorization.

FATE OF SILTS AND CLAY FROM RIVER AND ITS CONTRIBUTION TO TRANSPARENCY

T. Okuda, S. Nakai, W. Nishijima, 2017 .

Estimation of production and sedimentation of cyanobacterial toxins (microcystin) based on nutrient budgets in the reservoir of Isahaya Bay, Japan.

Tohru Takahashi, Akira Umehara, Tomohiro Komorita, 2019, Ecotoxicology and environmental safety.

Blooming of Microcystis aeruginosa in the reservoir of the reclaimed land and discharge of microcystins to Isahaya Bay (Japan)

Tohru Takahashi, Akira Umehara, H. Tsutsumi, 2012, Environmental Science and Pollution Research.

Increase in sedimentary organic carbon with a change from hypoxic to oxic conditions.

J. Puhakka, T. Hori, Yuya Sato, 2021, Marine pollution bulletin.

Contribution of the development of the stratification of water to the expansion of dead zone: A sedimentological approach

Akira Umehara, Jin-Woo Choi, T. Komatsu, 2015 .

Distribution of region-specific background Secchi depth in Tokyo Bay and Ise Bay, Japan

Satoshi Nakai, Wataru Nishijima, Feng Wang, 2019, Ecological Indicators.

Persistent organic pollutants are still present in surface marine sediments from the Seto Inland Sea, Japan.

S. Asaoka, Akira Umehara, K. Takeda, 2019, Marine pollution bulletin.

Spatial and temporal distribution of hydrogen sulfide and sulfur species in coastal marine sediments collected from Osaka Bay, Japan

Nobumichi Shutoh, T. Ohta, Testuji Okuda, 2023, Marine Chemistry.

Variations in macrobenthic community structures in relation to environmental variables in the Seto Inland Sea, Japan.

T. Okuda, S. Nakai, W. Nishijima, 2015, Marine pollution bulletin.

Determination and distribution of region-specific background Secchi depth based on long-term monitoring data in the Seto Inland Sea, Japan

Tetsuji Okuda, Satoshi Nakai, Wataru Nishijima, 2018 .

Filtration Rate of the Ascidian Ciona savignyi and Its Possible Impact

T. Okuda, S. Nakai, W. Nishijima, 2018, Thalassas: An International Journal of Marine Sciences.

Terrestrial anaerobic digestate composite for fertilization of oligotrophic coastal seas.

I. Ihara, S. Asaoka, Akira Umehara, 2021, Journal of environmental management.

Management of the west-central Seto Inland Sea, Japan: factors controlling the spatiotemporal distributions of chlorophyll a concentration and Secchi depth

Feng Wang, S. Nakai, W. Nishijima, 2019, Water Policy.