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The epiphytic diatom flora of mosses from Stromness Bay area, South Georgia

Tijdschriftbijdrage - Tijdschriftartikel

A total of 104 taxa, belonging to 27 genera, were recorded from 36 moss samples collected in the Stromness Bay area. Cluster analysis revealed two groups of samples. Group 1 consisted of the Achnanthes incognita-Fragilaria germainii assemblage and the Eunotia paludosa var. paludosa assemblage. Group 2 included the Pinnularia borealis assemblage. The major ecological factor dividing the two groups appears to be the moisture content of the samples. Group 1 represents wetter conditions, and the second group is found on very dry mosses. The assemblages of group 1 were separated from each other by pH. The Achnanthes incognita-Fragilaria germainii assemblage occurs in wet mosses with a circumneutral pH. The Eunotia paludosa var. paludosa assemblage prefers bryophyte habitats with low pH values. The size of Pinnularia borealis drops significantly according to the dryness of the moss habitat.
Tijdschrift: Polar Biology
ISSN: 0722-4060
Issue: 6
Volume: 17
Pagina's: 492-501
Jaar van publicatie:1997
Trefwoorden:diatom assemblage, epiphytic diatom, moss, Antarctica, South Georgia, Stromness Bay, Achnanthes incognita, Eunotia paludosa paludosa, Fragilaria germainii, Pinnularia borealis