The response of zooplankton abundance in saline meromictic Lake Shira to a change in circulation regime  

作　　者：Yuri V.BARKHATOV Alexander P.TOLOMEEV Anton V.DROBOTOV Egor S.ZADEREEV 

机构地区：[1]Krasnoyarsk Research Center,Institute of Biophysics,Siberian Branch of Russian Academy of Sciences,Akademgorodok,Krasnoyarsk 660036,Russia [2]Institute of Fundamental Biology and Biotechnology,Siberian Federal University,Krasnoyarsk 660041,Russia

出　　处：《Journal of Oceanology and Limnology》2023年第4期1321-1330,共10页海洋湖沼学报（英文）

基　　金：Supported by the RFBR and Krasnoyarsk Krai Government and the Krasnoyarsk Regional Fund of Science(No.19-44-240002);supported by the State Assignment of the Ministry of Science and Higher Education of the RF(No.0287-2021-0019).

摘　　要：The long-term data(1996-2021)on the summer abundances of the dominant zooplankton species(copepod Arctodiaptomus salinus(Daday,1885),rotifers Brachionus plicatilis(Müller,1786)and Hexarthra sp.)in saline Lake Shira were used to analyze the response of zooplankton to air temperature and a change in the circulation regime of the lake:breakdown and reestablishment of meromixis.All groups of zooplankton responded to prolonged summer elevated temperatures by increasing their abundance.During the breakdown of the stable stratification of Lake Shira(2015-2016),zooplankton abundance increased on average by a factor of two and amounted to 9×10^(5)inds./m^(2)in the water column for copepods.That increase coincided with similar responses of other components of the lake’s mixolimnion ecosystem,whose biomasses increased approximately two-fold during that period.After the reestablishment of the meromixis,the abundance of zooplankton decreased to previous values.Thus,the abundance of zooplankton is largely determined by weather(the effect of temperature)and ecological factors(mixing regime).

关 键 词：meromictic lake ZOOPLANKTON COPEPODS ROTIFERS meromixis breakdown 

分 类 号：Q958.8[生物学—动物学]