Microscopic analysis on eukaryotic algae and cyanobacteria in nine seasonal lakes and ponds in Vestfjella,Dronning Maud Land,Antarctica  

作　　者：Lauri ARVOLA Matti LEPPÄRANTA LI Zhijun 

机构地区：[1]Lammi Biological Station,University of Helsinki,Lammi FI-16900,Finland [2]Department of Physics,University of Helsinki,Helsinki FI-00014,Finland [3]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116023,China

出　　处：《Advances in Polar Science》2024年第2期206-218,共13页极地科学进展（英文版）

基　　金：supported by AF-NSFC mobility program from the Academy of Finland(Grant no.333170);National Natural Science Foundation of China(Grant no.52211530038).

摘　　要：Antarctic continental lakes and ponds are among the most impoverished aquatic environments on earth but many of them support flourishing populations of cyanobacteria,eukaryotic algae,protozoans,and some multicellular animals.In this study,we present results of a microscopic analysis of cyanobacteria and eukaryotic algae from nine diverse types of Antarctic continental water bodies during one austral summer.The results supplement and enlarge our previous studies on the limnological characteristics of the epiglacial and supraglacial lakes and ponds in Dronning Maud Land,an area that has received little attention from limnologists.The taxon with highest frequency among the samples(n=79)was Mesotaenium cf.berggrenii,a eukaryotic Zygnematophyceae,which occurred in 82%of the samples with a maximum cell density of 68 cells·mL^(-1).The taxa with second and third highest frequency were the prokaryotes Gloeocapsopsis(60%)and Leptolyngbya(41%),followed by Chlamydomonas(34%)and Cyanothece(29%).The number of taxa varied between 7-21 among the lakes and ponds,being highest in a supraglacial lake,and lowest in an epiglacial lake.The results did not reveal any obvious correlation between the abundance of any taxa and the water chemistry,but water bodies with inorganic sediments had higher cell densities and biomasses than those without sediment.This suggests the importance of sediment in supporting biological diversity in these ultraoligotrophic lakes and ponds.

关 键 词：Antarctic continental lakes Antarctic continental ponds CYANOBACTERIA algae protozoa rotifers TARDIGRADA 

分 类 号：Q17[生物学—水生生物学]