The key factors on the composition of phytoplankton functional groups in different watersheds in the Huanghe River basin  

作　　者：Jing DONG Feihu WANG Shuwen ZHANG Huatao YUAN Xiaofei GAO Jingxiao ZHANG Xuejun LI 

机构地区：[1]College of Fisheries,Henan Normal University,Xinxiang 453007,China

出　　处：《Journal of Oceanology and Limnology》2024年第6期1909-1927,共19页海洋湖沼学报（英文）

基　　金：Supported by the Young Backbone Teachers Project of Henan Province (No. 2020GGJS064);the Key Scientific and Technological Project of Henan Province (No. 232102321056);the Scientific Fund of Henan Normal University (No. 2020QK02);the Project of Huanghe River Fisheries Resources and Environment Investigation from the MARA,China,and the Observation and Research Station on Water Ecosystem in Danjiangkou Reservoir of Henan Province

摘　　要：To understand the distribution of phytoplankton functional groups(PFGs)and key factors on their compositions in different watersheds of the Huanghe(Yellow)River basin,25 river sites and 25 lake-reservoirs sites were selected.The contents of nephelometric turbidity(NTU),total nitrogen(TN),and total phosphorus(TP)were significantly higher in rivers than that in lakes or reservoirs,whereas the pH and CODMn(chemical oxygen demand or potassium permanganate index)were lower.Results show that,27 PFGs,namely,assemblages A,B,C,D,E,F,G,H,J,K,LM,Lo,M,MP,N,P,S1,S2,T,TC,W1,W2,X1,X2,X3,XPh,and Y,were identified.Additionally,ANOSIM correlation analysis demonstrated significant differences in PFG composition between the riverine and lake-reservoir sections in the Huanghe River basin.In the riverine watersheds,the group MP was dominant,while assemblages B and J were prevalent in lakes and reservoirs.The Mantel correlation tests and RDA analysis showed that environmental variables,such as NTU,water temperature(WT),conductivity(Cond),and TP,were key driving factors of shaping the dominant PFGs of the study area.Using the Venn diagram based on variation partitioning analysis,PFGs were mainly influenced by WT and TP in lake-reservoir sites,while in the river sites were affected mainly by geo-climatic variables.This study helps understanding the PFGs in river ecosystems,and unraveling the key driving factors in different watersheds,which shall be important for the protection and management of entire Huanghe River basin.

关 键 词：Huanghe River phytoplankton functional group driving factor riverine watershed lake-reservoir region 

分 类 号：X173[环境科学与工程—环境科学] X143[生物学—植物学] Q948.8