2016 Fiscal Year Final Research Report
Quantitative evaluation of zooplankton production by optical plankton observation system
| Project/Area Number |
24248032
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
藤森 康澄 北海道大学, 水産科学研究科(研究院), 教授 (40261341)
今井 一郎 北海道大学, 水産科学研究科(研究院), 特任教授 (80271013)
Lindsay Dhugal 国立研究開発法人海洋研究開発機構, 海底資源研究開発センター, 主任技術研究員 (80344282)
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| Project Period (FY) |
2012-04-01 – 2017-03-31
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| Keywords | 生物海洋学 / プランクトン / カイアシ類 / 生態効率 / バイオマス / サイズ / イメージング技法 / 物質循環 |
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| Outline of Final Research Achievements |
From both viewpoints of fisheries and oceanography, zooplankton size structure is a prime important factors to determine their flux. Concerning zooplankton size spectra, following four topics were evaluated: 1. Spatial distribution of neighboring water of Japan, 2. Geographical distribution in the North Pacific, 3. Vertical distribution down to greater depths covering whole North Pacific, 4. Yearly changes (1946-2012) in the Chukchi Sea.
Concerning energy transfer within the zooplankton community, bottom-up control and high energy transfer efficiencies were observed for the western subarctic Pacific. In the western subarctic Pacific, zooplankton community was dominated by large-sized copepod Neocalanus spp. For vertical distribution, regional differences in zooplankton community were recognized even in the deep-sea down to 2000 m. Inter-annually, zooplankton biomass in the Chukchi Sea increased through 1946-2012.
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| Free Research Field |
海洋プランクトン学
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