Spatiotemporal Distributions of Bacterioplankton Communities in the Qiantang River(Hangzhou Section),China  

作　　者：XU Jiaojiao ZHAO Li LUKWAMBE Betina NICHOLAUS Regan ZHU Jinyong YANG Wen ZHENG Zhongming 

机构地区：[1]School of Marine Sciences,Ningbo University,Ningbo 315211,China [2]School of Aquatic Sciences and Fisheries Technology,University of Dar es Salaam,Dar es Salaam,Tanzania [3]Department of Natural Sciences,Mbeya University of Science and Technology,Mbeya,Tanzania

出　　处：《Journal of Ocean University of China》2024年第4期1102-1114,共13页中国海洋大学学报（英文版）

基　　金：financially supported by the Fisheries Species Conservation Program of the Agricultural Department of China (Nos.171821303154051044,17190236);the Natural Science Foundation of Zhejiang Province (No.LQ20C190003);the Natural Science Foundation of Ningbo Municipality (Nos.2019A610421,2019A 610443);the K.C.Wong Magna Fund in Ningbo University。

摘　　要：The spatial and temporal distribution of bacterioplankton communities plays a vital role in understanding the ecological dynamics and health of aquatic ecosystems.In this study,we conducted a comprehensive investigation of the bacterioplankton communities in the Qiantang River(Hangzhou section).Water samples were collected quarterly from seven sites over a one-year period.Physical and chemical parameters,including dissolved oxygen(DO),water temperature(WT),chemical oxygen demand(COD),nitrite(NO_(2)^(-)),active phosphate(PO_(4)^(3-))and other indices were determined.In this study,theαdiversity,βdiversity and abundance differences of bacterial communities were investigated using 16S rRNA high-throughput sequencing analysis.The spatial and temporal distribution characteristics and main driving factors of the bacterioplankton community structure and diversity were discussed.The results showed that a total of 57 phyla were detected in the bacterioplankton community,among which Proteobacteria and Actinomycetes were the two dominant groups with the highest relative abundance.The results of PCoA based on Bray-Curtis distance showed that the sampling season had a slightly greater effect on the changes in bacterioplankton community structure in the Qiantang River.Mantel and partial Mantel test showed that environmental variables(Mantel r=0.6739,P<0.0001;partial Mantel r=0.507,P=0.0001)were more important than geographical distance(Mantel r=0.5322,P<0.001;partial Mantel r=0.1563,P=0.001).The distance attenuation model showed that there was significant distance attenuation in all four seasons,and the maximum limit of bacterial community diffusion was found in spring.RDA analysis showed that nine environmental factors,including COD,WT and DO,significantly affected community distribution(P<0.05).This study provides valuable insights into the spatial and temporal distribution characteristics of bacterioplankton communities,shedding light on their ecological roles in the Qiantang River.The information obtained can guide future

关 键 词：Qiantang River bacterioplankton community spatial and temporal distribution 16S rRNA range attenuation 

分 类 号：Q938.8[生物学—微生物学]