Phytoplankton and chlorophyll a relationships with ENSO in Prydz Bay, East Antarctica  

作　　者：ZHANG HaiSheng HAN ZhengBing ZHAO Jun YU PeiSong HU ChuanYu SUN WeiPing Yang Dan ZHU GenHai LU Bing Hans-UIrich PETER Walter VETTER 

机构地区：[1]The Second Institute of Oceanography,State Oceanic Administration [2]Laboratory of Marine Ecosystem and Biogeochemistry,State Oceanic Administration [3]Institute of Ecology, Friedrich Schiller University

出　　处：《Science China Earth Sciences》2014年第12期3073-3083,共11页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.40876104,41076134,41306202,and 41376193);the Scientific Research Fund of the Second Institute,SOA(Grant Nos.JT1208,JG1217 and JG1218)

摘　　要：The historical data of phytoplankton and chlorophyll a(Chl a)(1990–2002)obtained during the Chinese National Antarctic Research Expedition(CHINARE)in the Prydz Bay have been integrated.The results showed that the temperature,salinity,nutrients,and oxygen of seawater changed when El Nino/La Nina occurred.The variation of biological communities reflected the response of ecosystem to environmental changes.During El Ni?o period,Chl a concentration and phytoplankton community structure changed significantly,and the relative proportion of diatoms increased while dinoflagellates decreased.During La Ni?a period,the proportion of diatoms decreased,but the golden-brown algae and blue-green algae increased significantly.The variation of phytoplankton population directly affected the biodiversity of the bay,which were also quite sensitive to the marine environment changes.Meanwhile,the satellite remote sensing data of 2002–2011(December–March)have been used to study the temporal connection change of Chl a and phytoplankton in the Prydz Bay.We found that there were significant differences in the monthly variation characteristics of satellite remote sensing Chl a and sea surface temperature(SST),which had some links with sea ice melting and El Ni?o/La Ni?a events.We found that the start time of bloom advanced,lagged or synchronized with the changes of the SST,and we also found the occurrence time of phytoplankton bloom corresponded with the sea ice melting inner bay.To some extent,this study will help us understand the relationships between ENSO events and the phytoplankton bloom in the Southern Ocean.The historical data of phytoplankton and chlorophyll a（Chl a）（1990–2002）obtained during the Chinese National Antarctic Research Expedition（CHINARE）in the Prydz Bay have been integrated.The results showed that the temperature,salinity,nutrients,and oxygen of seawater changed when El Nino/La Nina occurred.The variation of biological communities reflected the response of ecosystem to environmental changes.During El Ni？o period,Chl a concentration and phytoplankton community structure changed significantly,and the relative proportion of diatoms increased while dinoflagellates decreased.During La Ni？a period,the proportion of diatoms decreased,but the golden-brown algae and blue-green algae increased significantly.The variation of phytoplankton population directly affected the biodiversity of the bay,which were also quite sensitive to the marine environment changes.Meanwhile,the satellite remote sensing data of 2002–2011（December–March）have been used to study the temporal connection change of Chl a and phytoplankton in the Prydz Bay.We found that there were significant differences in the monthly variation characteristics of satellite remote sensing Chl a and sea surface temperature（SST）,which had some links with sea ice melting and El Ni？o/La Ni？a events.We found that the start time of bloom advanced,lagged or synchronized with the changes of the SST,and we also found the occurrence time of phytoplankton bloom corresponded with the sea ice melting inner bay.To some extent,this study will help us understand the relationships between ENSO events and the phytoplankton bloom in the Southern Ocean.

关 键 词：Prydz Bay ANTARCTICA PHYTOPLANKTON chlorophyll a sea ice melting El Nino/La Nina satellite remote sensing 

分 类 号：Q948[生物学—植物学] P732[天文地球—海洋科学]