Water chemistry and diatom occurrences in sediments of Terrasovoje, Radok and Beaver Lake, Amery Oasis, East Antarctica ...

• Main Authors: Cremer, Holger, Gore, Damian B, Hultzsch, Nadja, Melles, Martin, Wagner, Bernd
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2004
• Subjects: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Amery; Antarctic; Arctic; Beaver Lake; East Antarctica; Radok Lake; The Antarctic; Antarc*; Antarctica; Phytoplankton; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.847363; https://doi.pangaea.de/10.1594/PANGAEA.847363

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. ... : Supplement to: Cremer, Holger; Gore, Damian B; Hultzsch, Nadja; Melles, Martin; Wagner, Bernd (2004): The diatom flora and limnology of lakes in the Amery Oasis, East Antarctica. Polar Biology, 27(9), 513-531 ...