The temporal and spatial changes of periphytic algae community structure and its relationship with environmental factors were studied at five sampling sections in Jiangsu section of the mainstream of Huai River in four seasons from November 2020 to July 2021.The results showed that 39 species of periphytic algae from 36 genera and 5 phyla were detected in this section.The species composition was dominated by Bacillario-phyta,Chlorophyta and Cyanophyta,accounting for 35.90％,33.33％and 23.08％respectively.There was no significant spatial difference in periphytic algae community structure,but there was a seasonal variation trend of autumn＞winter＞spring＞summer.Alpha diversity index and beta diversity distance analysis both showed that the changes in periphytic algae community were mainly seasonal,with higher degree of variation in sum-mer and winter than in spring and autumn.Environmental factor redundancy analysis(dbRDA)showed that the environmental factors affecting the succession of periphytic algae community structure in different seasons were dif-ferent,and total nitrogen was the only significant factor in nutrient indicators.
关键词
着生藻类/群落结构/时空变化特征/环境因子/淮河干流江苏段
Key words
Periphytic algae/Community struc-ture/Spatial-temporal variation characteristic/Envi-ronmental factors/Jiangsu section of the mainstream of Huai River
维普
万方数据