中国海洋大学学报（自然科学版）2025，Vol.55Issue(12)：79-91,13.DOI:10.16441/j.cnki.hdxb.20240242
三峡库区蓄水期和消落期表层原生动物群落结构的时空变化
The Spatiotemporal Dynamics of the Community Structure of Protozoa in the Three Gorges Reservoir Area
摘要
Abstract
To compare the characteristics of protozoan community structure and water quality during the water storage and drawdown periods in the Three Gorges Reservoir area,the protozoan communities in 17 main stream and tributary sections from the reservoir tail to the dam were investigated in May and October 2017,respectively.A total of 55 species of protozoa were identified,belonging to 10 orders,18 families,and 18 genera.In both periods,the dominant genus in both main streams and tributaries was Tintinnopsis,with a relative abundance of up to 87%during the water storage period.The average den-sity and biomass of protozoa in the main stream were 40%higher during the water storage period com-pared to the drawdown period,and diversity was also significantly higher.In contrast,the average den-sity and biomass of protozoa in the tributaries decreased by 14%during the water storage period com-pared to the drawdown period,with no significant change in diversity.The diversity of protozoa in the main stream was significantly higher than in the tributaries during the water storage period,but there was no significant difference during the drawdown period.Principal coordinate analysis(PCoA)showed a large difference in the community structure of protozoa between the water storage and drawdown peri-ods,while the difference between the main stream and tributaries was small.Spearman correlation anal-ysis indicated that the density and diversity of protozoa in the main stream were significantly positively correlated with conductivity,whereas the diversity of protozoa in the tributaries was significantly nega-tively correlated with pH.Redundancy analysis(RDA)showed that pH and conductivity were impor-tant factors affecting the community structure of protozoa in the Three Gorges Reservoir area.Based on the evaluation of the protozoan communities,the water quality in the tributaries was found to be more polluted than in the main stream,especially the tributaries near the Three Gorges Dam may be greatly affected.关键词
三峡库区/原生动物/多样性/群落结构/时空变化Key words
Three Gorges Reservoir area/protozoa/diversity/community structure/spatiotemporal variation分类
生物学引用本文复制引用
熊雪平,孔巧意,胡媛媛,罗晓甜,毛成志,王云峰,黄洁..三峡库区蓄水期和消落期表层原生动物群落结构的时空变化[J].中国海洋大学学报（自然科学版）,2025,55(12):79-91,13.基金项目
科技基础资源调查专项(2022FY100401)资助 Supported by the Science and Technology Fundamental Resources Investigation Programme of China(2022FY100401) （2022FY100401）
