Title
Structure and ecology of freshwater benthic diatom communities from Byers Peninsula, Livingston Island, South Shetland IslandsStructure and ecology of freshwater benthic diatom communities from Byers Peninsula, Livingston Island, South Shetland Islands
Author
Faculty/Department
Faculty of Sciences. Biology
Research group
Ecosystem Management
Publication type
article
Publication
Oxford,
Subject
Economics
Physics
Chemistry
Biology
Source (journal)
Antarctic science. - Oxford
Volume/pages
25(2013):2, p. 239-253
ISSN
0954-1020
ISI
000316479700012
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Diatom and water chemistry samples were collected from 49 lakes, pools and rivers on Byers Peninsula (Livingston Island, South Shetland Islands) during the summer of 2009. A diverse diatom flora of 143 taxa was found. Fragilaria capucina s.l., Psammothidium papilio, Navicula dobrinatemniskovae and several Nitzschia taxa dominated the flora. The biogeographical analysis showed that more than 55% of all observed taxa presented a restricted Antarctic biogeographic distribution and only 30% had a cosmopolitan distribution, contrary to previously published data. Cluster analysis and Principal Components Analysis were used to classify the samples based on their chemical characteristics, revealing that nutrients and specific conductance were the main factors dividing the samples into four groups: young lakes, coastal lakes, larger lakes on the central plateau and smaller, temporary pools. Diatom communities corresponded well to this division and were strongly influenced by salinity and nutrients.
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