Clarifying eukaryotic microbial spatial distribution patterns and their determinants is an important idea in ecological research.However,information on the distribution patterns of eukaryotic microbial community structures(EMCSs)within oceans remains unclear.In this study,surface water samples from the southern East China Sea(SECS)were collected to investigate the spa-tiotemporal variation in EMCSs by using 18S rRNA high-throughput sequencing technology and the impact of this variation on Pseudosciaena crocea during the breeding season.The results indicated that the distribution patterns of the eukaryotic microbial community structure were different among the Sansha Bay,Mindong and Wentai reserves and the offshore East China Sea.In addi-tion,there were notable potential effects of EMCSs on fishery activities.The variation partitioning analysis showed the environ-mental and spatial factors caused 53.4％of the variation in the EMCSs,indicating that spatially structured environmental factors were the key determinants of the EMCSs spatial heterogeneity in the SECS and may have contributed to the general distribution of P.crocea.In addition,all the environmental factors were the main factors driving the distribution of eukaryotic microbes except for total phosphorus.Furthermore,it was noted some phytoplankton such as Poterioochromonas and Rhizophydium of fungi in Sansha Bay can effectively prevent Cyanobacteria blooms.Chrysophyceae are natural high-quality baits for juvenile fish distributed in San-sha Bay,Mindong and Wentai reserves.This study provides a part of the insight into potential eukaryotic community distributions in large water bodies and how they are affected by environmental factors.

ZHOU Shouheng;ZHENG Shizhan;LV Tianying;YANG Wen;LUKWAMBE Betina;NICHOLAUS Regan;LI Chenghua;ZHENG Zhongming

School of Marine Sciences,Ningbo University,Ningbo 315211,China;Department of Aquculture Technology,School of Aquatic Sciences and Fisheries Technology,University of Dar es Salaam,Dar es Salaam 999132,Tanzania;Department of Natural Sciences,Mbeya University of Science and Technology,Mbeya999068,Tanzania

中国海洋大学学报（自然科学英文版）

[1]ZHOU Shouheng;ZHENG Shizhan;LV Tianying;YANG Wen;LUKWAMBE Betina;NICHOLAUS Regan;LI Chenghua;ZHENG Zhongming-.Dynamics of the Eukaryotic Microbial Community at the Breeding Sites of the Large Yellow Croaker Pseudosciaena crocea in the Southern East China Sea)[J].中国海洋大学学报（自然科学英文版）,2022(03):789-800

Croaker,EMCSs,Sansha,Mindong,Wentai,Poterioochromonas,Rhizophydium,Chrysophyceae,baits

Dynamics,Eukaryotic,Microbial,Community,Breeding,Sites,Large,Yellow,Pseudosciaena,crocea,Southern,East,China,Sea,Clarifying,eukaryotic,microbial,patterns,their,determinants,important,idea,ecological,research,However,information,community,structures,within,oceans,remains,unclear,In,this,study,surface,water,samples,from,southern,SECS,were,collected,investigate,tiotemporal,variation,by,using,18S,rRNA,high,throughput,sequencing,technology,impact,during,breeding,season,results,indicated,that,different,among,Bay,reserves,offshore,there,notable,potential,effects,fishery,activities,partitioning,analysis,showed,factors,caused,indicating,spatially,structured,environmental,key,heterogeneity,may,have,contributed,general,addition,driving,microbes,except,total,phosphorus,Furthermore,was,noted,some,phytoplankton,such,fungi,can,effectively,prevent,Cyanobacteria,blooms,are,natural,quality,juvenile,distributed,This,provides,insight,into,distributions,large,bodies,they,affected

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