生态环境学报2024，Vol.33Issue(6)：946-957,12.DOI:10.16258/j.cnki.1674-5906.2024.06.012
海湖湿地水体蓝藻水华期浮游生物群落特征及其影响因素
Characteristics of Plankton Community and Its Influencing Factors during Algal Blooms Period in the Haihu Wetland
摘要
Abstract
The frequency of algal blooms triggered by eutrophication is increasing in plateau wetland ecosystems,which negatively affects the health of local ecosystems.To analyze the changes of plankton community structures during the whole process of Cyanobacterial bloom,the Haihu wetland in Xining City,Qinghai Province was investigated as a study area.Plankton community structures were monitored at six monitoring sites in March(bloom outbreak stage),April(bloom decline stage)and May(bloom end stage)in 2022.Vegan and rdacca.hp packages of the R were utilized to quantitatively analyze the environmental factors that affect the structures of the plankton communities.Results showed that:1)a total of 94 species of 7 phyla of phytoplankton and 46 species of 4 phyla of zooplankton were identified in the above three periods.Keratella cochlearis was the dominant species in all three periods.2)An increasing trend from upstream to downstream was observed in plankton density and biomass.The trends of phytoplankton and zooplankton exhibited contrasting patterns.The phytoplankton biomass reached the maximum value(63.84 mg·L-1)in bloom decline stage,while the zooplankton biomass reached its maximum value(6.76 mg·L-1)in bloom end stage.3)Pearson Correlation and Canonical Correspondence Analysis(CCA)showed significant differences in dominant influencing factors of the dominant plankton species in three periods of algal bloom.Phytoplankton and zooplankton were significantly affected by TN and water temperature in the bloom outbreak stage(p<0.05),NH4+-N and TP in the bloom decline stage(p<0.05),and pH and water temperature in the bloom end stage(p<0.05),respectively.4)The water quality evaluation based on the zooplankton diversity index indicated that the water quality of the Haihu wetland was at a good level between medium pollution and no pollution.5)Variance Partitioning Analysis(VPA)and Hierarchical Partitioning(HP)showed that water temperature produced stronger effect(13.01%)on phytoplankton community(p<0.01),while TN conducted stronger effect(6.70%)on zooplankton community structures(p>0.01).This study showed that the Cyanobacterial bloom significantly affected the succession of plankton community structures in the Haihu wetland,which may provide some information for the management of wetland algal blooms.关键词
层次分割/浮游植物/浮游动物/CCA分析/青藏高原/富营养化Key words
hierarchical partitioning/phytoplankton/zooplankton/canonical correspondence analysis(CCA)/Qinghai Plateau/eutrophication分类
生物学引用本文复制引用
刘泽碧,毛旭锋,吴艺,宋秀华,于红妍,金鑫,杜凯,谢顺邦..海湖湿地水体蓝藻水华期浮游生物群落特征及其影响因素[J].生态环境学报,2024,33(6):946-957,12.基金项目
青海省自然科学基金项目(2024-ZJ-910) （2024-ZJ-910）
