Seasonal variation of phytoplankton community and its relationship with environmental factors in the influent rivers of Dishui Lake
CHEN Yan
YUAN Lin
HU Jingyang
ZHANG Yu
XUE Junzeng
CHEN Chong
CHEN Jiajie
HU Qianye
Abstract：In order to clarify the spatial and temporal distribution of phytoplankton community and its relationship with environmental factors in the influent rivers of Dishui Lake,twelve sampling sites were set up at the lake inlet,Neilian River,Zhonglian River and Wailian Rivier,and the phytoplankton there were field surveyed from Sept.2018 to Aug.2019.In total,8 phyla,93 genera and 232 species of phy-toplankton were collected in the survey area.Among the total,species in Chlorophyta accounted for 41.81％,species in Bacillariophyta for 22.41％,species in Cyanophyta for 18.97％and species in Eu-glenophyta for 11.64％.The number of phytoplankton species in Neilian River and Zhonglian River was high,especially in the sample 8.The phytoplankton density ranged from 584X104 cells/L to 1985 × 104 cell/L.The phytoplankton was mainly composed of Chlorophyta and Cyanobacteria,with the highest density documented in spring and the lowest in winter.The phytoplankton density in the sec-ond route of Neilian River was significantly high than that in other sampling sites.Pearson correlation analysis showed that pH,DO,TN and NO3--N were the main factors affecting phytoplankton density,but there was no correlation wss found between the density and sal,NO2--N and SD.Canonical corre-spondence analysis showed that WT,DO,TN,NH+4-N and NO3--N are the main factors affecting phy-toplankton composition.
Keywords：phytoplanktoncommunity structurespatiotemporal distributionCCA
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 142-151 )