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Yu Umezawa

Macroalgal metabolism and lateral carbon flows can create significant carbon sinks
2020 · Kenta Watanabe, Goro Yoshida, et al. · Biogeosciences · 154
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Fine‐scale mapping of land‐derived nitrogen in coral reefs by δ15N in macroalgae
2002 · Yu Umezawa, Toshihiro Miyajima, et al. · Limnology and Oceanography · 146
Decline in heavy metal contamination in marine sediments in Jakarta Bay, Indonesia due to increasing environmental regulations
2011 · Takahiro Hosono, Chih-Chieh Su, et al. · Estuarine Coastal and Shelf Science · 145
Sources of nitrate and ammonium contamination in groundwater under developing Asian megacities
2008 · Yu Umezawa, Takahiro Hosono, et al. · The Science of The Total Environment · 138
Significance of groundwater nitrogen discharge into coral reefs at Ishigaki Island, southwest of Japan
2002 · Y. Umezawa, T. Miyajima, et al. · Coral Reefs · 105
Multiple isotope (H, O, N, S and Sr) approach elucidates complex pollution causes in the shallow groundwaters of the Taipei urban area
2010 · Takahiro Hosono, Chung-Ho Wang, et al. · Journal of Hydrology · 99
Effects of intensive urbanization on the intrusion of shallow groundwater into deep groundwater: Examples from Bangkok and Jakarta
2008 · Shin-ichi Onodera, Mitsuyo Saito, et al. · The Science of The Total Environment · 88
Temporal variability of stable carbon and nitrogen isotopic composition of size-fractionated particulate organic matter in the hypertrophic Sumida River Estuary of Tokyo Bay, Japan
2006 · Taeko Sato, Toshihiro Miyajima, et al. · Estuarine Coastal and Shelf Science · 81
Seasonal shifts in the contributions of the Changjiang River and the Kuroshio Current to nitrate dynamics in the continental shelf of the northern East China Sea based on a nitrate dual isotopic composition approach
2014 · Y. Umezawa, A. Yamaguchi, et al. · Biogeosciences · 73
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Microbiological nitrogen transformation in carbonate sediments of a coral-reef lagoon and associated seagrass beds
2001 · T Miyajima, M Suzumura, et al. · Marine Ecology Progress Series · 69
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Erratum to “Sources of nitrate and ammonium contamination in groundwater under developing Asian megacities”
2009 · Yu Umezawa, Takahiro Hosono, et al. · The Science of The Total Environment · 61
Phosphorus as a driver of nitrogen limitation and sustained eutrophic conditions in Bolinao and Anda, Philippines, a mariculture-impacted tropical coastal area
2016 · Charissa M. Ferrera, Atsushi Watanabe, et al. · Marine Pollution Bulletin · 59
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Application of multi-isotope ratios to study the source and quality of urban groundwater in Metro Manila, Philippines
2010 · Takahiro Hosono, Fernando Siringan, et al. · Applied Geochemistry · 51
Net release of dissolved organic matter by the scleractinian coral Acropora pulchra
2009 · Yasuaki Tanaka, Toshihiro Miyajima, et al. · Journal of Experimental Marine Biology and Ecology · 46
Human impacts on large benthic foraminifers near a densely populated area of Majuro Atoll, Marshall Islands
2010 · Yoko Osawa, Kazuhiko Fujita, et al. · Marine Pollution Bulletin · 45
Groundwater Dynamics of Fongafale Islet, Funafuti Atoll, Tuvalu
2011 · Satoshi Nakada, Yu Umezawa, et al. · Ground Water · 38
Cycling of phosphorus maintains the production of microphytobenthic communities in carbonate sediments of a coral reef
2002 · Masahiro Suzumura, Toshihiro Miyajima, et al. · Limnology and Oceanography · 36
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Highly heterogeneous diazotroph communities in the Kuroshio Current and the Tokara Strait, Japan
2017 · Shunyan Cheung, Koji Suzuki, et al. · PLoS ONE · 32
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Erratum to “Effects of intensive urbanization on the intrusion of shallow groundwater into deep groundwater: Examples from Bangkok and Jakarta”
2009 · Shin-ichi Onodera, Mitsuyo Saito, et al. · The Science of The Total Environment · 26
Distribution and partitioning of nitrogen and phosphorus in a fringing reef lagoon of Ishigaki Island, northwestern Pacific
2007 · T Miyajima, H Hata, et al. · Marine Ecology Progress Series · 26
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Hypoxic water mass in the highly turbid well-mixed macrotidal Rokkaku River Estuary, Ariake Sea, Japan
2019 · Yuichi Hayami, Minoru Wada, et al. · Estuarine Coastal and Shelf Science · 23
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Microbial community respiration and structure of dead zone sediments of Omura Bay, Japan
2012 · Minoru Wada, Shotaro Suzuki, et al. · Journal of Oceanography · 23
Nitrogen burden from atmospheric deposition in East Asian oceans in 2010 based on high-resolution regional numerical modeling
2021 · Syuichi Itahashi, Kentaro Hayashi, et al. · Environmental Pollution · 22
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Evidence of chronic anthropogenic nutrient within coastal lagoon reefs adjacent to urban and tourism centers, Kenya: A stable isotope approach
2017 · Jelvas Mwaura, Yu Umezawa, et al. · Marine Pollution Bulletin · 22
Underground sources of nutrient contamination to surface waters in Bangkok, Thailand
2008 · William C. Burnett, Supitcha Chanyotha, et al. · The Science of The Total Environment · 22
Works count: 82
Citation count: 2,001
H-index: 22
I10-index: 44
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