Spatial distribution of planktonic ciliates in the western Pacifc Ocean: along the transect from Shenzhen (China) to Pohnpei (Micronesia)  

作　　者：Hungchia Huang Jinpeng Yang Shixiang Huang Bowei Gu Ying Wang Lei Wang Nianzhi Jiao Dapeng Xu 

机构地区：[1]State Key Laboratory of Marine Environmental Science,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China [2]School of Marine Sciences,Sun Yat-Sen University,Guangzhou 510006,China [3]Fujian Key Laboratory of Marine Carbon Sequestration,Xiamen University,Xiamen 361102,China [4]College of the Environment and Ecology,Xiamen University,Xiamen 361102,China

出　　处：《Marine Life Science & Technology》2021年第1期103-115,共13页海洋生命科学与技术（英文）

基　　金：This work was funded by the National Natural Science Foundation of China(Nos.41876142,91751207,41606168,and 41861144018);the Senior User Project of RV KEXUE(No.KEXUE2019G08);funded by the Center for Ocean Mega-Science,Chinese Academy of Sciences and China Ocean Mineral Resources R&D Association(DY135-E2-1-04);JY was also funded by MEL Visiting Fellowship(MELRS1921);the Fundamental Research Funds for the Central Universities(20lgpy66);HH was supported by the Training Program of Innovation and Entrepreneurship for Undergraduate at Xiamen University(2018X0724)Special thanks are given to Prof.

摘　　要：Planktonic ciliates have been recognized as major consumers of nano-and picoplankton in pelagic ecosystems,playing pivotal roles in the transfer of matter and energy in the microbial loop.However,due to the difculties in identifcation,the species composition of ciliate assemblages,especially for the small,fragile,and naked species that usually dominate the ciliate communities in the oceanic waters,remains largely unknown.In the present study,22 stations along the transect from Shenzhen(China)to Pohnpei(Micronesia)were sampled for the enumeration of picoplankton and nanofagellates.In addition,pigment analysis of major phytoplankton groups along with the measurements of environmental variables including temperature,salinity,and nutrients were also carried out.Ciliates were identifed at species level using quantitative protargol stain to reveal the species composition and their distribution patterns from of-shore to open ocean.Ciliate abundance was positively correlated with phosphate,silicate,and pico-sized pigmented eukaryotes(PPEs),whereas the biomass was closely related with PPEs,heterotrophic nanofagellates,and chlorophytes.The combination of silicate and pigmented nanofagellates was identifed as the major factor driving the ciliate community composition.The close relationship between silicate and ciliate abundance and community structure needs further validation based on more data collected from oceanic waters.Our study showed the necessity of using techniques that can reveal the community composition at higher taxonomic resolutions in future studies on ciliates.

关 键 词：Community structure Distribution pattern Diversity Nanofagellates Quantitative protargol stain 

分 类 号：Q178.53[生物学—水生生物学]