The diatom flora and limnology of lakes in the Amery Oasis, East Antarctica

The diatom flora of three lakes in the ice-free Amery Oasis, East Antarctica, was studied. Two of the lakes are meltwater reservoirs, Terrasovoje Lake (31 m depth) and Radok Lake (362 m depth), while Beaver Lake (>435 m depth) is an epishelf lake. The lakes can be characterized as cold, ultra-oli...

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Bibliographic Details
Published in:Polar biology 2004-08, Vol.27 (9), p.513-531
Main Authors: CREMER, Holger, GORE, Damian, HULTZSCH, Nadja, MELLES, Martin, WAGNER, Bernd
Format: Article
Language:English
Subjects:
Amphora veneta
Animal and plant ecology
Animal, plant and microbial ecology
Antarctic zone
Bacillariophyceae
Biogeography
Biological and medical sciences
Craticula
Cymatopleura
Flora
Fresh water ecosystems
Fundamental and applied biological sciences. Psychology
Holocene
Lakes
Limnology
Meltwater
Particular ecosystems
Phytoplankton
Pinnularia
Plankton
Stauroneis anceps
Synecology
Taxa
Water depth
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Summary:The diatom flora of three lakes in the ice-free Amery Oasis, East Antarctica, was studied. Two of the lakes are meltwater reservoirs, Terrasovoje Lake (31 m depth) and Radok Lake (362 m depth), while Beaver Lake (>435 m depth) is an epishelf lake. The lakes can be characterized as cold, ultra-oligotrophic and alkaline, displaying moderate (Radok and Terrasovoje lakes) to high (Beaver Lake) conductivities. There was no diatom phytoplankton present in any of the three lakes. While 34 benthic diatom taxa were identified from modern and Holocene sediments of Terrasovoje and Radok lakes, a 30-cm long sediment core recovered in Beaver Lake was barren. Five species (Luticola muticopsis, Muelleria peraustralis, Pinnularia cymatopleura, Psammothidium metakryophilum, P. stauroneioides) are endemic to the Antarctic region. All identified taxa are photographically documented and brief notes on their taxonomy, biogeography and ecology are provided. The most abundant diatom taxa are Amphora veneta, Craticula cf. molesta, Diadesmis spp, M. peraustralis and Stauroneis anceps. This is the first report on the diatom flora in lakes of the Amery Oasis.[PUBLICATION ABSTRACT]
ISSN:0722-4060
1432-2056
DOI:10.1007/s00300-004-0624-2