Isao Koike
Commendation
For outstanding contributions to marine research on the nitrogen cycle and organic particles and to the coordination of research initiatives in environmental sciences.
A list of five major papers
- KOIKE, I. and A. HATTORI: Growth yield of a denitrifying bacterium, Pseudomonas denitrificans under aerobic and denitrifying conditions. J. Gen. Microbiol., 88, 1-10, 1975.
- KOIKE, I. and A. HATTORI : Denitrification and ammonia formation in anaerobic coastal sediments. Appl. Environ. Microbiol., 35, 278-282, 1978.
- KOIKE, I. and H. MUKAI: Oxygen and inorganic nitrogen contents and fluxes in burrows of the shrimps Callianassa japonica and Upogebia major. Mar. Ecol. Prog. Ser., 12, 185-190, 1983.
- KOIKE, I., O. HOLM-HANSEN and D.C. BIGGS: Inorganic nitrogen metabolisms by Antarctic phytoplankton with special references to ammonium cycling. Mar. Ecol. Prog. Ser., 30, 105-116, 1986.
- KOIKE, I., S. HARA, K. TERAUCHI and K. KOGURE: Role of sub-micrometre particles in the ocean. Nature, 345, 242-244, 1990.
Major achievements
Dr. Koike has made outstanding contributions to the study of marine nitrogen cycle and the dynamics of marine organic matter. He introduced pioneering experimental approaches using stable isotopes of nitrogen, and published numerous seminal findings on the interactions between the nitrogen cycle and biological processes in coastal waters, making major contributions to advancing the fundamental understanding of the marine nitrogen cycle. He also discovered abundant abiotic microparticles in seawater, named “Koike particles”. This discovery attracted worldwide attention and represented abreakthrough in the study of marine biogeochemical cycles. His work has provided a new conceptual framework for understanding the dynamics of organic matter and microbial metabolism in the ocean. In addition, he served as chairs of several committees related to Earth environmental research, including in the Science Council of Japan, the Council for Science and Technology Policy of the Cabinet Office, and the Ministry of Education, Culture, Sports, Science and Technology. In these roles, he made substantial contributions to the planning and coordination of research policies in the environmental field. Internationally, he held key positions in the International Geosphere-Biosphere Programme and devoted significant efforts to internationally promoting research in Earth environmental sciences.
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Nominator
Hiroshi OGAWA
Supporters
Toshi Nagata, Uematsu Mitsuo, Kogure Kazuhiro