2017-2021 年洞庭湖浮游植物变化趋势
Variation Tendency of Phytoplankton in Dongting Lake from 2017 to 2021
尹宇莹 1欧阳美凤 2蒋艳萍 1彭耀 1符哲2
作者信息
- 1. 湖南省长沙生态环境监测中心,湖南 长沙 410000
- 2. 湖南省洞庭湖生态环境监测中心,湖南 岳阳 414000
- 折叠
摘要
2017-2021年洞庭湖共记录浮游植物8门99属,其中蓝藻门20属,绿藻门39属,硅藻门24属,甲藻门3属,裸藻门 6 属,隐藻门 4 属,金藻门 1 属,黄藻门 2 属.出现的物种主要是绿藻门、硅藻门和蓝藻门,分别占全湖种类数的39.4%、24.2%和 20.2%,其他门类占比为 16.2%.与 1988-2017 年统计的数据相比,2017-2021 年洞庭湖浮游植物绿藻门占比降低 1.5%,硅藻门占比降低 5.3%,蓝藻门占比增加 2.4%.1988-2017 年洞庭湖浮游植物藻密度为 3.23×105 cells/L,2017-2021年洞庭湖浮游植物藻密度为5.87×106 cells/L.其中,东洞庭湖浮游植物藻密度为1.518×107 cells/L,南洞庭湖浮游植物藻密度为 1.187×106 cells/L,西洞庭湖浮游植物为 1.248×106 cells/L.东洞庭湖浮游植物藻密度显著高于西洞庭湖和南洞庭湖.
Abstract
From the investigation during 2017-2021,phytoplankton species belonging to 8 phyla and 99 genera were recorded in Dongting Lake,including 20 genera from Cyanophyta,39 genera from Chlorophyta,24 genera from Bacillariophyta,3 genera from Pyrrhophyta,6 genera from Euglenophyta,4 genrera fron Cryptophyta,1 genera from Chrysophyte and 2 genera from Xanthophyta.Within the phytoplankton assemblages in Dongting Lake,the dominat groups were Chlorophyta,Bacillariophyta and Cyanophyta,which accounted for 39.4%,24.2%and 20.2%of total numbers of species,respectively.Whereas others 5 phyla only accounted for 16.2%of total numbers of species richness.Compared with the data collected during 1988-2017,the proportion of Chlorophyta in the phytoplankton of Dongting Lake during 2017-2021 decreased by 1.5%,that of Bacillariophyta decreased by 5.3%,and that of Cyanophyta increased by 2.4%.From 3.23×105 cells/L during 1988-2017 to 5.87×106 cells/L at 2017-2021.The phytoplankton density of East Dongting Lake was 1.518×107 cells/L,which was 1.187×106 cells/L of South Dongting Lake,and 1.248×106 cells/L of West Dongting Lake.The density of phytoplankton in East Dongting Lake was significantly higher than that in West and South Dongting Lake.
关键词
洞庭湖/浮游植物/藻密度Key words
Dongting Lake/phytoplankton/algal density引用本文复制引用
基金项目
洞庭湖江湖生态监测重点站项目(JJ2017-028)
岳阳市长江生态环境保护技术与方案研究项目(2019-LHYJ-01-0213-01)
出版年
2024
NETL
NSTL
万方数据