Comparison in phytoplankton diversity-productivity-community stability between river-type reservoir and lake-type reservoir

作     者：Qiong WU Qiuhua LI Huan LUO Qian CHEN Huaxiang CHEN Yanjun DONG Shenghua LI Qiong WU;Qiuhua LI;Huan LUO;Qian CHEN;Huaxiang CHEN;Yanjun DONG;Shenghua LI

作者机构：College of EnvironmentHohai UniversityNanjing 210098China Pearl River Water Resources Research InstituteGuangzhou 510611China Key Laboratory of the Pearl River Estuary Regulation and Protection of Ministry of Water ResourcesGuangzhou 510611China Guangdong Provincial Engineering Technology Research Center for Life and Health of River&LakeGuangzhou 510611China Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou ProvinceGuizhou Normal UniversityGuiyang 550001China Bureau of Ecological Environment of Xunwu County of Jiangxi ProvinceXunwu 342200China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2022年第40卷第4期

页      面：1485-1507页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 0707[理学-海洋科学] 0713[理学-生态学] 

基　　金：Supported by the Key Research and Development Program of Guangdong Province(No.2019B110205004) the Science and Technology Foundation of Guizhou Province(Nos.4Y009,6009)。 

主　　题：community stability functional group stability phytoplankton diversity resource utilization effi ciency reservoir 

摘      要：Relationship between biodiversity and ecosystem function is one of the core issues in ecological research.Phytoplankton,as the main producer of aquatic ecosystem,its diversity,productivity,and community stability are of great signifi cance to reveal ecosystem function.There are signifi cant diff erences in hydrodynamics,water retention time,and phytoplankton community structure between river-type reservoir and newly built lake-type reservoir.The comparative analysis of phytoplankton community stability between the two types of reservoir has not been reported.Jiuquwan Reservoir(river-type)and Taihu Reservoir(lake-type),the two reservoirs in the Dongjiang River source area of Zhujiang(Pearl)River Basin,were selected for comparison in terms of multi-year operation vs.new impoundment,river-type vs.lake-type,and shallow water vs.sub-deep water reservoirs.Samples were collected in dry season(December 2019),normal season(March 2020),and wet season(August 2020),on which the phytoplankton diversity and productivity of the two reservoirs,and the relationship and diff erence of community stability were examined.Results show that(1)the number of phytoplankton species in Jiuquwan Reservoir decreased comparing that before algal bloom and the restoration treatment,while that in Taihu Reservoir increased compared with that before the impoundment of the reservoir.There was no signifi cant diff erence in functional groups and species number between the two reservoirs(P0.05);(2)the biological stability,diversity,productivity,and resource utilization effi ciency of newly built lake-type reservoir were higher than those of multi-year river-type reservoir.In addition,the utilization effi ciency of phytoplankton resources was the highest in wet season in both reservoirs.The increases in biodiversity,richness,and evenness promoted the stability of the community,while increases in productivity and resource utilization effi ciency weakened the stability of the community;(3)community stability was aff ected by both biotic and abiotic factors,and hydrodynamic index was the main factor.This study is helpful to understand the relationship and diff erences in phytoplankton diversity,productivity and community stability in diff erent types of reservoirs,and provides a guidance for maintaining the stability of reservoir water ecosystem and protecting the biodiversity.The relationships between phytoplankton diversity,productivity,and community stability will be investigated in depth,for which a long-term observation will be conducted on the impact of environmental factors and diversity on the local biostability in diff erent types of reservoirs.