水生生物学报2025，Vol.49Issue(5)：158-166,9.DOI:10.7541/2025.2024.0427
洞庭湖浮游植物群落结构特征及其影响因素分析
COMMUNITY STRUCTURE AND INFLUENCING FACTORS OF PHYTOPLANKTON IN DONGTING LAKE
摘要
Abstract
To investigate the structural characteristics and influencing factors of phytoplankton communities in Dong-ting Lake,quarterly surveys were conducted in different water areas of the lake in 2023.The results indicated that a total of 44 genera belonging to 6 phytoplankton phyla were identified,including 16 genera of green algae,12 of diatoms,and 10 of cyanobacteria.The average density of phytoplankton was 8.499× 105 cells/L,predominantly composed of diatoms and cyanobacteria,which accounted for 57.1％and 18.6％,respectively.Temporal distribution showed the highest average density in June(1.352×106 cells/L)and the lowest in December(3.448×105 cells/L).Spatially,the highest phytoplankton density was observed in West Dongting Lake(1.419× 106 cells/L),mainly compri-sing diatoms,followed by the river inlet,South Dongting Lake,East Dongting Lake,and the river outlet.The Shannon-Wiener diversity index ranged from 2.76 to 3.62,with the inlet,East Dongting Lake,and outlet rated as excellent,while West and South Dongting Lake were classified as good.The comprehensive nutrient status index for the entire lake was 48.1,indicating a mesotrophic level.Principal Component Analysis revealed that water temperature and chemical oxygen demand were the primary environmental factors.Redundancy Analysis indicated that the main factors affecting phytoplankton distribution were water temperature,dissolved oxygen,and ammonium nitrogen.This study provides data support for the ecological restoration and management of Dongting Lake.关键词
洞庭湖/浮游植物/群落结构/水环境Key words
Dongting Lake/Phytoplankton/Community structure/Water environment分类
水产学引用本文复制引用
郭晶,陈冬素,张屹,黄代中,严广寒,卢少勇..洞庭湖浮游植物群落结构特征及其影响因素分析[J].水生生物学报,2025,49(5):158-166,9.基金项目
岳阳市长江水生态环境保护研究(2022-LHYJ-02-0207-02)资助[Supported by the Ecological and Environmental Protection Study of the Yangtze River in Yueyang City(2022-LHYJ-02-0207-02)] （2022-LHYJ-02-0207-02）
