Fine‐scale mapping of land‐derived nitrogen in coral reefs by δ¹⁵N in macroalgae

Yu Umezawa, Toshihiro Miyajima, Masumi Yamamuro, +2

Limnology and Oceanography

EutrophicationEngineeringCoral EcosystemsMarine Chemistryδ 15 +20

Sources of nitrate and ammonium contamination in groundwater under developing Asian megacities

Yu Umezawa, Takahiro Hosono, Shin‐ichi Onodera, +7

The Science of The Total Environment

Groundwater QualityEngineeringAmmonium ContaminationEnvironmental EngineeringEnvironmental Remediation +6

Macroalgal metabolism and lateral carbon flows can create significant carbon sinks

Kenta Watanabe, Goro Yoshida, Masakazu Hori, +3

Biogeosciences

Macroalgal BedsEngineeringMarine ChemistryOrganic GeochemistryBiological Carbon Fixation +16

Decline in heavy metal contamination in marine sediments in Jakarta Bay, Indonesia due to increasing environmental regulations

Takahiro Hosono, Chih‐Chieh Su, Robert Delinom, +4

Estuarine Coastal and Shelf Science

Environmental ChemistryEngineeringSediment QualityEnvironmental EngineeringJakarta Bay +10

Significance of groundwater nitrogen discharge into coral reefs at Ishigaki Island, southwest of Japan

Yu Umezawa, Toshihiro Miyajima, Hajime Kayanne, +1

Coral Reefs

Groundwater Nitrogen DischargeMarine GeologyBiogeochemistryEngineeringCoral Reef +9

Multiple isotope (H, O, N, S and Sr) approach elucidates complex pollution causes in the shallow groundwaters of the Taipei urban area

Takahiro Hosono, Chung‐Ho Wang, Yu Umezawa, +6

Journal of Hydrology

Groundwater QualityHydrogeologyEnvironmental ChemistryComplex Pollution CausesEngineering +8

Effects of intensive urbanization on the intrusion of shallow groundwater into deep groundwater: Examples from Bangkok and Jakarta

Shin‐ichi Onodera, Mitsuyo Saito, Misa Sawano, +7

The Science of The Total Environment

Groundwater QualityHydrogeologyEngineeringCivil EngineeringGeography +5

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

Taeko Sato, Toshihiro Miyajima, Hiroshi Ogawa, +2

Estuarine Coastal and Shelf Science

Organic GeochemistryBiogeochemistryEutrophicationEngineeringEstuarine Geochemistry +6

Microbiological nitrogen transformation in carbonate sediments of a coral-reef lagoon and associated seagrass beds

Takayuki Miyajima, Masahiro Suzumura, Yu Umezawa, +1

Marine Ecology Progress Series

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

Yu Umezawa, Akira Yamaguchi, Joji Ishizaka, +7

Biogeosciences

EutrophicationNo3 UptakeEngineeringKuroshio CurrentMarine Chemistry +19