Effect of river plume on phytoplankton community structure in Zhujiang River estuary

查看全文 作　　者：Qi [1]ZHONG;Bing [2]XUE;Md Abu [2,3]NOMAN;Yuqiu [1]WEI;Haijiao [1]LIU;Hongbin [4]LIU;Liping [5]ZHENG;Hongmei [5]JING;Jun [2,3]SUN

机构地区：[1]Institute of Marine Science and Technology,Shandong University,Qingdao 266200,China;[2]Research Centre for Indian Ocean Ecosystem,Tianjin University of Science and Technology,Tianjin 300457,China;[3]Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin University of Science and Technology,Tianjin 300457,China;[4]Department of Ocean Science and Division of Life Science,Hong Kong University of Science and Technology,Hong Kong 999077,China;[5]Institute of Deep-sea Science and Engineering,Chinese Academy of Sciences,Sanya 572000,China

出　　处：《Journal of Oceanology and Limnology》索引2021年第39卷第2期,共16页

基　　金：Supported by the National Key Research and Development Program of China(No.2015CB954002);the National Natural Science Foundation of China(Nos.41876134,41676112,41276124);the University Innovation Team Training Program for Tianjin(No.TD12-5003);the Tianjin 131 Innovation Team Program(No.20180314);the Changjiang Scholar Program of Chinese Ministry of Education(No.T2014253)to Jun SUN。 摘　　要：To examine the phytoplankton assemblages and the effect of diluted waters on them,a research cruise was conducted from July 19 to August 7,2015 in the Zhujiang(Pearl)River estuary in the northern South China Sea(21°N–23.5°N,111°E–117°E).Samples were collected from 65 stations including one for time-series sampling.A total of 212 phytoplankton taxa were identified from 61 genera belonging to 4 phyla.Among them,122 species identified from 42 genera of Bacillariophyta and 83 species from 15 genera of Pyrrophyta.Chain-forming diatoms dominated the phytoplankton community where Pseudonitzschia delicatissima,Guinardia striata,Thalassionema nitzschioides,and P.pungens comprised about 52%of the total abundance.However,higher cell abundances concentrated on both sides of the estuary,because of low salinity and high nutrients brought by diluted water.In addition,Canonical Correspondence Analysis revealed that salinity and dissolved inorganic nitrogen shaped the species composition in the study area.Furthermore,the Jaccard similarity index showed prevailing high similarity in the distribution of species in low-salinity diluted waters,and the Bray-Curtis similarity depicted distinguished grouping for phytoplankton assemblages along the salinity gradient.However,phytoplankton diel vertical cycles showed maximum abundance occurred at 2:00 am,which was mainly contributed by benthic phytoplankton species Pseudo-nitzschia spp.and T.nitzschioides. 关键词：PHYTOPLANKTON Canonical Correspondence Analysis diel cycle Zhujiang(Pearl)River estuary

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Effect of river plume on phytoplankton community structure in Zhujiang River estuary

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