2012 Fiscal Year Final Research Report
Grazing impact of microzooplankton on phytoplankton distribution and material cycle in subtropical ocean
| Project/Area Number |
22710027
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
KITAMURA Minoru 独立行政法人海洋研究開発機構, 海洋・極限環境生物圏領域, 研究員 (00392952)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 生物海洋 / 微小動物プランクトン |
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| Research Abstract |
Primary productivity is high in surface layer but phytoplankton biomass is high in subsurface Chl.a maximum layer in the subtropical ocean. To solve this mismatch, grazing of microzooplankton in surface and subsurface layers were observed. Grazing rates in surface layer (0.08～1.05 d^<-1>) were higher than those in Chl.a maximum layer(0.01～0.24 d^<-1>) but the rates were variable in both layers. The higher grazing rate suggests that grazing is one of the factors decreasing phytoplankton biomass in surface layer, but the grazing impact maybe not constantly large.
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