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D-Index & Metrics

Environmental Sciences

D-Index
52
Citations
8563
World Ranking
4557
National Ranking
76

Overview

Isao Koike is affiliated with the University of Tokyo in Japan and specializes in environmental science with a focus on oceanography, pollution, and environmental chemistry. Their research primarily addresses topics related to marine and coastal ecosystems, microplastics and plastic pollution, and per- and polyfluoroalkyl substances (PFAS) research.

The scientist's recent scholarly contributions include the paper titled "Heterogeneity of Transparent Exopolymer Particles in a Coastal Marine Environment (Sagami Bay, Japan): Seasonal Variation and Its Possible Bacterial Causes", published in 2021 in Frontiers in Marine Science.

  • Heterogeneity of Transparent Exopolymer Particles in a Coastal Marine Environment (Sagami Bay, Japan): Seasonal Variation and Its Possible Bacterial Causes (2021, Frontiers in Marine Science)

Isao Koike has collaborated frequently with several co-authors in their research work:

  • Kugako Sugimoto
  • Hideki Fukuda
  • Toshi Nagata

Publications by Isao Koike have appeared in the journal Frontiers in Marine Science, which is also a notable venue for their recent work.

In terms of research domains, Isao Koike works extensively within the fields of:

  • Environmental Science
  • Earth and Planetary Sciences

Their specific subfields of study include:

  • Oceanography
  • Pollution
  • Environmental Chemistry

The main topics covered throughout Isao Koike's research are:

  • Marine and coastal ecosystems
  • Microplastics and Plastic Pollution
  • Per- and polyfluoroalkyl substances research

Best Publications

  • Direct Determination of Carbon and Nitrogen Contents of Natural Bacterial Assemblages in Marine Environments

    Rumi Fukuda;Hiroshi Ogawa;Toshi Nagata;Isao Koike

  • Production of Refractory Dissolved Organic Matter by Bacteria

    Hiroshi Ogawa;Yukio Amagai;Isao Koike;Karl Kaiser

  • The Importance of marine sediment biodiversity in ecosystem processes

    P Snelgrove;T Blackburn;Hutchings P.A;Alongi Dm

  • Denitrification and ammonia formation in anaerobic coastal sediments.

    Isao Koike;Akihiko Hattori

  • Abundance of viruses in marine waters: assessment by epifluorescence and transmission electron microscopy.

    Shigemitsu Hara;Kazuki Terauchi;Isao Koike

  • Bacterioplankton distribution and production in deep Pacific waters: Large-scale geographic variations and possible coupling with sinking particle fluxes

    Toshi Nagata;Hideki Fukuda;Rumi Fukuda;Isao Koike

  • Estimates of Denitrification and Nitrification in Coastal and Estuarine Sediments

    Takashi Nishio;Isao Koike;Akihiko Hattori

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

    Yu Umezawa;Toshihiro Miyajima;Masumi Yamamuro;Hajime Kayanne

  • Importance of foraminifera for the formation and maintenance of a coral sand cay: Green Island, Australia

    H. Yamano;T. Miyajima;I. Koike

  • Nitrification rates and 15 N abundances of N 2 O and NO 3 − in the western North Pacific

    Naohiro Yoshida;Hajime Morimoto;Mitsuhiro Hirano;Isao Koike

  • Inorganic nitrogen metabolism by Antarctic phytoplankton with special reference to ammonium cycling

    I Koike;O Holm-Hansen;DC Biggs

  • Vertical distributions of dissolved organic carbon and nitrogen in the Southern Ocean

    Hiroshi Ogawa;Rumi Fukuda;Isao Koike

  • Energy yield of denitrification: an estimate from growth yield in continuous cultures of Pseudomonas denitrificans under nitrate-, nitrite- and oxide-limited conditions.

    Unknown

  • Denitrification, nitrate reduction, and oxygen consumption in coastal and estuarine sediments.

    Takashi Nishio;Isao Koike;Akihiko Hattori

  • N2O production, nitrification and denitrification in an estuarine sediment

    T. Usui;I. Koike;N. Ogura

  • Simultaneous determinations of nitrification and nitrate reduction in coastal sediments by a 15N dilution technique

    Unknown

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

    Y. Umezawa;T. Miyajima;H. Kayanne;I. Koike

  • Growth yield of a denitrifying bacterium, Pseudomonas denitrificans, under aerobic and denitrifying conditions.

    Unknown

  • Translocation and conservation of organic nitrogen within the coral-zooxanthella symbiotic system of Acropora pulchra, as demonstrated by dual isotope-labeling techniques

    Yasuaki Tanaka;Toshihiro Miyajima;Isao Koike;Takeshi Hayashibara

  • Evidence of ontogenetic migration from mangroves to coral reefs by black-tail snapper Lutjanus fulvus: stable isotope approach

    Yohei Nakamura;Masahiro Horinouchi;Takuro Shibuno;Yoshiyuki Tanaka

  • Nitrogen metabolism of the filter-feeding bivalve Corbicula japonica and its significance in primary production of a brackish lake in Japan

    Masumi Yamamuro;Isao Koike

  • Amino acid and ammonium utilization by heterotrophic marine bacteria grown in enriched seawater

    Luis Tupas;Isao Koike

  • Hydrographic features of the deep water of the Bering Sea—the sea of Silica

    Shizuo Tsunogai;Masashi Kusakabe;Hitoshi Iizumi;Isao Koike

Frequent Co-Authors

Toshi Nagata
Toshi Nagata University of Tokyo
Hajime Kayanne
Hajime Kayanne University of Tokyo
Paul V. R. Snelgrove
Paul V. R. Snelgrove Memorial University of Newfoundland
Gary M. King
Gary M. King Louisiana State University
Melanie C. Austen
Melanie C. Austen Plymouth University
Ken Furuya
Ken Furuya Soka University
Craig R. Smith
Craig R. Smith University of Hawaii at Manoa
Hiroya Yamano
Hiroya Yamano National Institute for Environmental Studies
Yoshiki Sohrin
Yoshiki Sohrin Kyoto University
Osmund Holm-Hansen
Osmund Holm-Hansen University of California, San Diego

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