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A lower trophic ecosystem model including iron effects in the Okhotsk Sea

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Title: A lower trophic ecosystem model including iron effects in the Okhotsk Sea
Authors: Okunishi, Takeshi Browse this author
Kishi, Michio J. Browse this author →KAKEN DB
Ono, Yukiko Browse this author
Yamashita, Toshihiko Browse this author
Keywords: ecosystem model
Okhotsk Sea
primary production
Issue Date: 15-Sep-2007
Publisher: Elsevier
Journal Title: Continental Shelf Research
Volume: 27
Issue: 16
Start Page: 2080
End Page: 2098
Publisher DOI: 10.1016/j.csr.2007.05.007
Abstract: We applied a three-dimensional ecosystem-physical coupled model including iron the effect to the Okhotsk Sea. In order to clarify the sources of iron, four dissolved iron compartments, based on the sources of supply, were added to Kawamiya et al.’s(1995) model (KKYS) to create our ecosystem model (KKYS-Fe). We hypothesized that four processes supply iron to sea water: atmospheric loadings from Northeastern Asia, input from the Amur River, dissolution from sediments and regeneration by zooplankton and bacteria. We simulated 1year, from 1 January, 2001 to 31 December, 2001, using both KKYS-Fe and KKYS. KKYS could not reproduce the surface nitrate distribution after the spring bloom, whereas KKYS-Fe agreed well with observations in the northwestern Pacific because it includes iron limitation of phytoplankton growth. During the spring bloom, the main source of iron at the sea surface is from the atmosphere. The contribution of riverine iron to the total iron utilized for primary production is small in the Okhotsk Sea. Atmospheric deposition, the iron flux from sediment and regeneration of iron in the water column play important roles in maintaining high primary production in the Okhotsk Sea.
Type: article (author version)
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 岸 道郎

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