浒苔防控期间辐射沙洲绿潮分布区浮游植物群落现状  

Current status of phytoplankton community in green tide area of radial sand ridges during prevention of Ulva prolifera

作　　者：朱旭宇[1] 葛跃浩 杨波[1] 丁言者[1] 贲成恺[2] 肖悦悦 张虎[2] ZHU Xuyu;GE Yuehao;YANG Bo;DING Yanzhe;BEN Chengkai;XIAO Yueyue;ZHANG Hu(Marine Environmental Monitoring Station of Nantong,State Oceanic Administration,Nantong 226005,China;Institute of Oceanology&Marine Fisheries,Nantong 226005)

机构地区：[1]国家海洋局南通海洋环境监测中心站,江苏南通226002 [2]江苏省海洋水产研究所,江苏南通226002

出　　处：《海洋湖沼通报（中英文）》2024年第5期146-154,共9页Transactions of Oceanology and Limnology

基　　金：江苏省财政资金项目(2020-SJ-016-01)。

摘　　要：2019年11月至2020年5月在辐射沙洲绿潮分布区进行了持续的人为干预浒苔发生的活动,为了解该海域浮游植物群落的变化特征,分别于2019年5月、2020年5月对该海域绿潮分布区(120°~124°E,32°~34°N)的浮游植物和环境因子进行了分析。研究结果表明,2019年春季共鉴定浮游植物4门33属53种,其中硅藻25属43种,甲藻6属7种,其余门类(金藻和隐藻)3种;2020年春季共鉴定浮游植物6门49属72种,其中硅藻31属51种,甲藻13属16种,其余门类(裸藻、绿藻、金藻和隐藻)5种。共发现浮游植物优势种11种,主要优势种均为硅藻,其中具槽帕拉藻Paralia sulcata优势度较高。2019年春季(1.39×10^(4)cells/L)浮游植物平均细胞丰度低于2020年春季(2.06×10^(4)cells/L)。浮游植物群落参数(浮游植物种类数、香农威纳指数和Margalef丰富度指数)和环境因子(水温、悬浮物、pH、溶解氧、浊度)均存在显著年度差异。Spearman相关性分析和RDA分析结果表明,影响浮游植物群落参数的环境因子主要有:pH、溶解氧、盐度、溶解无机氮、活性磷酸盐、活性硅酸盐、氮磷比和悬浮物等。From November 2019 to May 2020,a continuous human intervention was carried out in the occurrence of Ulva prolifera in the green-tide area of radial sand ridges.To understand the change of phytoplankton community,we documented phytoplankton composition and environmental parameters in green-tide area(120°00'0″~124°00'0″E,32°00'0″~34°00'0″N)in April in 2019(before prevention of U.prolifera)and 2020(after prevention of U.prolifera).A total of 4 phyla,33 genera,53 species were identified in 2019,which mainly included 43 diatom species,7 dinoflagellate species,and 5 other taxonomic(Chrysophyta and Cryptophyta)species.A total of 6 phyla,49 genera,72 species were identified in 2020,which included 51 diatom species,13 dinoflagellate species and other taxonomic(Euglenophyta,Chlorophyta,Chrysophyta,Cryptophyta)species.A total of 11 dominant phytoplankton species were found.Diatoms dominated the phytoplankton community,of them Paralia sulata was the top dominant species in 2019 and 2020.The average cell abundance in spring 2019(1.39×10^(4)cells/L)was lower than that in spring 2020(2.06×10^(4)cells/L).Both the phytoplankton community parameters(species number,Shannon-Wiener diversity index,Margalef richness index)and environmental factor(temperature,suspended solids,pH,dissolved oxygen,turbidity)were different between the two years.Spearman analysis and redundancy analysis showed that pH,dissolved oxygen,salinity,nutrients and suspended solids were the main factors influencing phytoplankton community.

关 键 词：浮游植物 辐射沙洲 群落 环境因子 绿潮 

分 类 号：P735[天文地球—海洋生物学]