Download Antarctic Terrestrial Microbiology: Physical and Biological by Don A. Cowan PDF

By Don A. Cowan

This publication brings jointly a few of the world’s top specialists within the fields of Antarctic terrestrial soil ecology, supplying a accomplished and fully up to date research of the prestige of Antarctic soil microbiology.

Antarctic terrestrial soils characterize the most severe environments on the earth. as soon as regarded as principally sterile, it really is referred to now that those various and infrequently really expert severe habitats harbor a really wide selection of alternative microorganisms.

Antarctic soil groups are really basic, yet no longer unsophisticated. contemporary phylogenetic and microscopic experiences have confirmed that those groups have good proven trophic structuring and play an important function in nutrient biking in those chilly and sometimes dry wilderness ecosystems. they're strangely conscious of swap and probably delicate to climatic perturbation.

Antarctic terrestrial soils additionally harbor really expert ‘refuge’habitats, the place microbial groups improve less than (and inside) translucent rocks. those cryptic habitats supply targeted versions for knowing the actual and organic ‘drivers’ of group improvement, functionality and evolution.

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Extra info for Antarctic Terrestrial Microbiology: Physical and Biological Properties of Antarctic Soils

Example text

This trend was also noted by Yergeau et al. (2007a) with soil microbial abundances (fungi and bacteria) significantly associated with location/plant-cover interactions and vegetation-related edaphic characteristics. 2 Fungi in the Fossil Record and Glacial Ice Fungi have been present in Antarctica since at least the Permian period with many examples of diverse fossil fungi being found from the Triassic and Jurassic Periods, as demonstrated by paleomycological and paleoecological investigations (Harper et al.

5 Temporal Variation in Bacterial Communities Recent evidence suggests that temporal variation in bacterial community structure may occur rapidly in response to environmental change in Antarctic soils. In a soil warming experiment on the Antarctic Peninsula, soil community compositions were found to shift in response to an increase of 2 °C over the course of just 3 years (Yergeau et al. 2012). Acidobacteria representation was found to decrease in soils of higher temperature, while Alphaproteobacteria representation increased.

In Antarctic studies, non-lichenized fungi have generally been considered separately from lichenized forms and the list of non-lichenized fungi reported from Antarctic regions (including the sub-Antarctic) is extensive at +1,000 species. Fungi are notorious contaminants especially around sites of human activity, and it is crucial to acknowledge the difficulty of discerning transient/introduced versus indigenous and endemic fungi, and to understand their respective contributions to terrestrial biodiversity.

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