Planktonic ciliate trait structure variation over Yap,Mariana,and Caroline seamounts in the tropical Western Pacific Ocean  

作　　者：Chaofeng WANG Haibo LI Yi DONG Li ZHAO Gérald GREGORI Yuan ZHAO Wuchang ZHANG Tian XIAO 

机构地区：[1]CAS Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [2]Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China [3]Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China [4]Aix-Marseille University,Toulon University,CNRS,IRD,Mediterranean Institute of Oceanology UM110,Marseille 13288,France

出　　处：《Journal of Oceanology and Limnology》2021年第5期1705-1717,共13页海洋湖沼学报（英文）

基　　金：the Science&Technology Basic Resources Investigation Program of China(No.2017FY100803);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB42000000);the China Postdoctoral Science Foundation(No.2020M672149);the National Key Research and Development Program of China(No.2017YFA0603204);the CNRS-NSFC Joint Research Projects Program(No.NSFC 41711530149);the 2017-2019 Sino-French Cai Yuanpei Program;the International Cooperation Project-Dynamics and Function of Marine Microorganisms(No.ICP-DYF2M):Insight from Physics and Remote Sensing;。

摘　　要：Trait structure is increasingly used in plankton ecology to understand diversity and biogeography.However,our knowledge of micro zooplankton(e.g.planktonic ciliates)trait structure and its variation with hydrography is limited.In this study,we analyzed planktonic ciliate trait structure in waters with different hydrography and deep Chlorophyll a maximum(DCM)layers over three seamounts:Yap,Mariana,and Caroline seamounts.Mariana seamount had a lower surface temperature than the Yap and Caroline seamounts.DCM layers over Mariana and Caroline seamounts were deeper than Yap seamount.There was a weak upwelling in upper 50 m around top of Mariana seamount.The ciliate distribution showed bimodal pattern(high abundance appeared in the surface and DCM layers)over three seamounts.At surface layer,the large size-fraction(>30μm)abundance proportion to aloricate ciliate over Yap seamount(44.4%)was higher than Mariana(32.8%)and Caroline(36.1%)seamounts.For tintinnid abundance proportion to total ciliate,Mariana(12.0%)and Caroline(11.5%)seamounts at about 100-m depth were higher than that of Yap seamount(6.4%).Vertically,tintinnid could be divided into 4 groups over the three seamounts.At30-m depth,group I(species occurring from surface to 100 m only)was dominant component over Yap and Caroline seamounts,while group IV(species occurring at every depth)changed into dominant component over Mariana seamount,the weak upwelling might be the reason.Salpingella faurei was the top dominant species,which corresponded to deeper DCM layers over Mariana and Caroline seamounts.Our results showed that the upwelling and the deeper DCM could influence the planktonic ciliate trait structure.

关 键 词：planktonic ciliate UPWELLING SEAMOUNT vertical distribution Western Pacific Ocean 

分 类 号：Q958.8[生物学—动物学]