Variations in nano-and pico-eukaryotic phytoplankton assemblages in the Qinhuangdao green-tide area

作     者：Weiqian ZHANG Hongbin HAN Limei QIU Chao LIU Qingchun ZHANG Guizhong ZHOU Weiqian ZHANG;Hongbin HAN;Limei QIU;Chao LIU;Qingchun ZHANG;Guizhong ZHOU

作者机构：Qingdao University of Science and TechnologyQingdao 266071China CAS and Shandong Province Key Laboratory of Experimental Marine BiologyInstitute of OceanologyCAS Center for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Fisheries Science and Food Production ProcessesPilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China CAS Key Laboratory of Marine Ecology and Environmental SciencesInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental SciencePilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Eco-Environmental Science and TechnologyFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China University of Chinese Academy of SciencesBeijing 100049China Center of Ocean Mega ScienceChinese Academy of SciencesQingdao 266071China 

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6期

页      面：2446-2461页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：Supported by the National Key R&D Program of China(No.2019YFC14079000) the National S&T Basic Resources Investigation Program of China(No.2018FY100206)from the Ministry of Science and Technology(MoST) 

主　　题：nano-and pico-eukaryotic phytoplankton high-throughput sequencing green tide eutrophication Qinhuangdao 

摘      要：Qinhuangdao coastal waters have been frequently hitting by nano-and pico-eukaryotic phytoplankton(NPEP)blooms and green tides(macroalgal blooms)in the recent ***,understanding about the impacts of environmental factors and the green tides on the NPEP assemblages in this area is *** this study,the composition of NPEP assemblages and their variations were analyzed via amplicon sequence variants(ASVs)assay based on amplicon high-throughput sequencing data with the 18S V4 region as a targeted gene in the Qinhuangdao green-tide area during the green ***,average NPEP effective sequences and ASVs of 178000 and 200 were obtained from each sample,*** there were 25 classes,110 genera,and 97 species of NPEP were identified and annotated,the proportions of annotated ASVs at genus and species levels were only 44.7%and 17.8%,*** NPEP communities had a seasonal succession from diatom-dominated to *** the three investigations,Skeletonema,Karlodinium,and Gonyaulax were the most dominant genera in May,August,and September,*** diversity and the abundance of NPEP communities could be increased by a high content of dissolved organic nitrogen(DON)and dissolved organic phosphorus(DOP)but inhibited by low dissolved inorganic phosphorus *** outbreak of green tides could alter the composition and content of nutrients and accelerate the succession of the NPEP communities from diatom-dominated to dinoflagellate-dominated under the background of a seasonal increase in seawater *** results preliminarily revealed the impacts of the recurrent occurrences of green tides on the NPEP assemblages in the Qinhuangdao green-tide area exhibiting high DON content and dissolved inorganic nitrogen/phosphorus ratio.