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Aspects of microbial and protozoan abundances in Signy Island fellfields

, : Aspects of microbial and protozoan abundances in Signy Island fellfields. British Antarctic Survey Bulletin, 83-90 No. 68

Determinations of the abundances of protozoan and microbial taxa (bacteria, fungi, yeasts, algae, flagellates and testate amoebae) were made in two fellfield sites on Signy Island. Samples for counts were taken along short transects located to include a variety of substrata: fines, coarse, Usnea-colonized stones and Andreaea cushions. All materials except Andreaea had low moisture and organic content. Bacteria and flagellates showed declining abundances along transect gradients from fines to coarse. Highest protozoan numbers were associated with Andreaea cushions, but microflora were lower in these than in unvegetated materials.


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