海洋科学2024，Vol.48Issue(12)：44-58,15.DOI:10.11759/hykx20240715001
2021年秋季黄海颗石藻群落结构特征及影响因素探讨
Community structure and influencing factors of living cocco-lithophores in the Yellow Sea in autumn 2021
摘要
Abstract
In order to clarify the autumn distribution of living coccolithophores with influencing factors in the Yel-low Sea,samples of living coccolithophores were collected during a Yellow Sea cruise in autumn of 2021.The spe-cies composition,abundance,and diversity were analyzed through scanning electron microscopy,and potentially influencing factors were determined.A total of 31 species were recorded,including six morphotypes.The dominant species were as follows:Emiliania huxleyi,Gephyrocapsa oceanica,Syracosphaera delicate,Michaelsarsia adri-aticus,Algirosphaera robusta,and Acanthoica quattrospina.The abundance of coccospheres and coccoliths exhib-ited a pattern of patchy distribution along the opposite side of the 50 m isobath.The maximum abundance was 178.4×103 cells L-1 with a mean of 37.4×103 cells L-1.Moreover,the abundance in deep stations was 6.43-fold higher than that of shallow stations.The contribution of E.huxleyi to the total abundance was 45.5%in the surface water,and it was 51.7%in the bottom water,with maximal occurrence in pelagic and deep stations.G.oceanica was mainly distributed in the coastal and shallow stations.The species richness and diversity in deep stations were 5.03-and 3.65-fold higher than that of the shallow stations,respectively.The rich abundance and diversity of living coc-colithophores in the Yellow Sea during autumn were largely attributed to the potential limitations of dissolved ni-trogen(N)and relatively low nutrients in the surface waters.Thus,future works should focus on the utilization of dissolved organic N and phosphorous under nutrient-limited conditions,as well as responses to the seasonal acidi-fication of seawaters in the Yellow Sea and associated adaptation mechanisms.关键词
浮游植物/颗石藻/营养盐/氮磷比/黄海Key words
phytoplankton/coccolithophore/nutrient/nitrogen to phosphorus ratio/the Yellow Sea分类
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栾青杉,袁涌铨,时永强,刘永健,韩青鹏..2021年秋季黄海颗石藻群落结构特征及影响因素探讨[J].海洋科学,2024,48(12):44-58,15.基金项目
国家自然科学基金资助项目(42106116) （42106116）
中央级公益性科研院所基本科研业务费专项(20603022022006,23TD01):National Natural Science Foundation of China,No.42106116 （20603022022006,23TD01）
Special Scientific Research Funds for Central Non-profit Institutes,Nos.20603022022006,23TD01 （）
