Diversity of cyanobacteria in seepages of King George Island, maritime Antarctica

0129761 - BU-J 20035026 RIV SIGLE NL eng C - Konferenční příspěvek (zahraniční konf.)
Komárek, Jiří - Komárek, O.
Diversity of cyanobacteria in seepages of King George Island, maritime Antarctica.
Antarctic Biology in a Global Context. Leiden: Backhuys Publishers, 2003 - (Huiskes, A.), s. 244-250. ISBN 90-5782-079-X.
[SCAR International Biology Symposium /8./. Amsterdam (NL), 27.08.2001-01.09.2001]
Grant CEP: GA AV ČR KSK6005114; GA AV ČR IAA6005002
Výzkumný záměr: CEZ:AV0Z6005908
Klíčová slova: cyanobacteria * seepages * Antarctica
Kód oboru RIV: EF - Botanika

Microalgal communities with dominant cyanobacteria (cyanoprokaryotes) develop in meltwater seepages in deglaciated areas of the maritime Antarctica during the Antarctic summer season. Our results from King George Island show that these communities have a characteristic succession, vertical structure and species composition. About 15 cyanobactcrial species were found dominant in this habitat. The developed community formed thick, stratified mats with different species in layers. Dominant cyanoprokaryotes belonged to the genera Leptolyngbya, Phormidium, Nostoc and Tolypothrix, whose diversity and ecology were evaluated by statistical methods. The main environmental factors (temperature from 2.2o-8.2oC , light regime, nutrition) were described. Cyanobacterial communities in seepages in maritime Antarctica represent a unique biocenosis important in terrestrial successional processes. The communities appear to be endemic to coastal Antarctic regions in terms of species composition, distinctive mat structure and seasonality. They are a unique feature of Antarctic living resources, and should be protected from human impacts.
Trvalý link: http://hdl.handle.net/11104/0027934