The physical and chemical conditions in the Sagami River estuary were measured during the high-temperature summer season of 2021, and the results were correlated with the distribution of phytoplankton. The results showed that thermal stratification was clearly observed from the mouth of the river to 5000 m offshore, and that saline stratification was observed in the thin surface layer from the mouth of the river to 2000 m offshore due to the inflow of fresh water from the Sagami River. The low-salinity water contains high concentrations of nitrate, which corresponds to the relatively high biomass of phytoplankton, mainly in the surface layer at 1500 m offshore. Relatively high concentrations of unconsumed phosphate remained in this water mass, indicating that phytoplankton growth in this region may be ratelimited by nitrogen nutrients. This study suggested the structure of the phytoplankton community in this high-temperature season to predict the structure after global warming in the future, and showed that measurements with improved spatial resolution were able to detect water mass structures in this area that were missed by normal resolution measurements.
内容記述
原著
2021年度神奈川大学総合理学研究所共同研究助成論文
雑誌名
Science Journal of Kanagawa University
巻
33
ページ
103 - 109
発行年
2022-07-30
ISSN
1880-0483
書誌レコードID
AA12068302
著者版フラグ
publisher
出版者
神奈川大学総合理学研究所
Research Institute for Integrated Science, Kanagawa University
相模川河口域における長期環境変動のモニタリング9 夏季高水温の海況と植物プランクトン分布
14 相模川河口域における長期環境変動のモニタリング9 夏季高水温の海況と植物プランクトン分布
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