Response of the Phytoplankton Sinking Rate to Community Structure and Environmental Factors in the Eastern Indian Ocean
文献类型： 外文期刊
作者： Wang, Xingzhou 1 ; Sun, Jun 2 ; Wei, Yuqiu 5 ; Wu, Xi 3 ;
作者机构： 1.Tianjin Univ Sci & Technol, Coll Food Sci & Engn, Tianjin 300457, Peoples R China
2.Tianjin Univ Sci & Technol, Res Ctr Indian Ocean Ecosyst, Tianjin 300457, Peoples R China
3.China Univ Geosci Wuhan, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China
4.China Univ Geosci Wuhan, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
5.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
关键词： phytoplankton sinking rate; community structure; eastern indian ocean; environmental factors; oligotrophic
期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）
ISSN：
年卷期： 2022 年 11 卷 12 期
页码：
收录情况： SCI
摘要： The phytoplankton sinking rate in the eastern Indian Ocean was measured during spring 2017 based on the SETCOL method. The range of phytoplankton sinking rates was -0.291 to 2.188 md(-1), with an average of 0.420 +/- 0.646 md(-1). The phytoplankton sinking rate in the Equator (EQ) and the eastern boundary of the Indian Ocean near Sumatra (EB) was lower than that in the Bay of Bengal (BOB). The sinking rate above 100 m was low and increased rapidly below 100 m in all the three regions. The phytoplankton community composition had an important impact on the phytoplankton sinking rate in the east Indian Ocean. The strong stratification in BOB resulted in Trichodesmium spp. bloom and a lower phytoplankton diversity and evenness in BOB, while the phytoplankton in the deep layer are senescent cells that sink down from the upper layer and cannot actively regulate the state of the cells, resulting in a higher sinking rate. Depth and temperature have a great impact on the physiological state of phytoplankton. The sinking rate of phytoplankton depend on the dominant groups composing the phytoplankton community. For the eastern Indian Ocean, seawater stratification caused by temperature changes the distribution of nutrients in the upper layer, and phytoplankton are affected by temperature and nutrients, resulting in changes in community structure, and finally showing different subsidence characteristics.
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