Molecular diversity and biogeography of benthic microeukaryotes in temperate seagrass(Zostera japonica)systems of northern China  

作　　者：Pengyuan Liu Haikun Zhang Yanyu Sun Caixia Wang Xiaoke Hu 

机构地区：[1]Key Laboratory of Coastal Biology and Bioresource Utilization,Yantai Institute of Coastal Zone Research,Chinese Academyof Sciences,Yantai 264003,China [2]Laboratory for Marine Biology and Biotechnology,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]School of Integrated Traditional Chinese and Western Medicine,Binzhou Medical University,Yantai 264003,China

出　　处：《Acta Oceanologica Sinica》2022年第11期115-125,共11页海洋学报（英文版）

基　　金：The National Key Research and Development Program under contract No.2020YFD0901003;the National Natural Science Foundation of China under contract Nos 92051119,42077305 and 32070112;the Special National Project on Investigation of Basic Resources of China under contract No.2019FY100700;the Key Research Project of Frontier Science of Chinese Academy of Sciences under contract No.QYZDB-SSW-DQC041;the Taishan Scholar Project Special Funding under contract No.Tspd20210317。

摘　　要：The productivity and health of seagrass depend on the combined inputs of nutrients from the water and sediments in which they grow and the microbiota with which they live intimately.However,little is known about the composition and diversity pattern of single-celled benthic eukaryotes in seagrass meadows.Here,we investigated how the structure and diversity of the benthic microeukaryotic community vary with respect to season,location,and seagrass colonization,by applying 18S rRNA gene amplicon sequencing for 96 surface sediment samples that were collected from three different seagrass habitats through four seasons.We found that benthic microeukaryotic communities associated with seagrass Zostera japonica exhibited remarkable spatial and seasonal variations,as well as differences between vegetated and unvegetated sediments.Diatoms and dinoflagellates predominated in the benthic microeukaryotic communities,but they were inversely correlated and displaced each other as the dominant microbial group in different seasons or habitats.Mucoromycota was more prevalent in vegetated sediments,whereas Lobulomycetales and Chytridiales had higher proportions in unvegetated sites.Total organic carbon and total organic nitrogen were the most important environmental factors in driving the microeukaryotic assemblages and diversity.Our study expands the available knowledge on the biogeographic distribution patterns and niche preferences for benthic microeukaryotes in seagrass systems.

关 键 词：BIOGEOCHEMISTRY spatiotemporal variation SEASONALITY microeukaryote seagrass meadow seagrass-colonized effect microbial ecology 

分 类 号：Q178.53[生物学—水生生物学]