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Chapitre D'ouvrage Année : 2022

Microbiology of the Cryosphere: Diversity, Habitat Constraints and Ecology

Résumé

Polar Regions are transforming; they provide visible signals of change, and yet, are also actors intrinsically involved in global cooling through a number of feedback mechanisms. These changes alter the structure and functioning of many cryosphere ecosystems and by extension those of the planet. Due to the extreme temperatures and the limited presence of liquid water, snow and ice were regarded simply as freezers that entrap and store microorganisms in a vegetative state and, therefore, the microbial ecology of the cryosphere was largely overlooked. Here we summarize research on the role of microorganisms in the functioning of environmental ices by highlighting the links between their biotic and abiotic components. This chapter focuses on observations of snow and ice in the Arctic and explores the biodiversity, the microbial population dynamics and influence of microorganisms on biogeochemical cycling, and their interactions with their physical and chemical environment. Through these studies, we have challenged the view of snow and ice as simply cold storage and have shown that they should be considered as ecosystems.
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Dates et versions

hal-03827601 , version 1 (24-10-2022)

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Catherine Larose, Lorrie Maccario, Timothy Vogel. Microbiology of the Cryosphere: Diversity, Habitat Constraints and Ecology. Chemistry in the Cryosphere, WORLD SCIENTIFIC, pp.755-794, 2022, ⟨10.1142/9789811230134_0015⟩. ⟨hal-03827601⟩
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