相模川河口域の植物プランクトンの分布への淡水流入の影響

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原著　2011 年度神奈川大学総合理学研究所共同研究助成論文The stratification of seawater body and the distribution of phytoplankton were estimated in the estuary of Sagami River．In the fall of 2010，the sea was stratified and mixed within a depth of less than 50 m．Above this stratified layer，massive inflow of fresh water from the river made a low‐density layer with low salinity that covered the surface of this area from the mouth to more than 2000 m offshore．Higher densities of chlorophyll a were observed in the surface layer offshore from the mouth than those at the mouth and in the stratified lower layer．These different densities of phytoplankton biomass show a different environment and could indicate possible different responses among phytoplankton communities at the mouth，and in the upper and lower layers．In the winter of 2011，the sea was well mixed to a depth of more than 100 m，and the freshwater inflow was small．The phytoplankton was almost evenly distributed．
2012-06-30