Contrasts between the cryoconite and ice-marginal bacterial communities of Svalbard glaciers

Polar research

Alexandre M. Anesio¹  Hilary J. Worgan²  Tristram D.L. Irvine-Fynn³  Sara M.E. Rassner³  Birgit Sattler³  Arwyn Edwards⁴  Gareth Wyn Griffith⁵  Hefin Wyn Williams⁶ 

[1] Institute of Geography and Earth SciencesLlandinam Building, Aberystwyth University, Aberystwyth SY23 3DB, UK;Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, University Road, Bristol BS8 1SS, UK;Institute of BiologicalRural and Environmental Sciences, Cledwyn Building, Aberystwyth University, , Aberystwyth SY23 3FG UK;Institute of BiologicalRural and Environmental Sciences, Cledwyn Building, Aberystwyth University, , Aberystwyth SY23 3FG UKCorrespondence;Institute of EcologyUniversity of Innsbruck, Technikerstrasse 25, AT-6020 Innsbruck, Austria;Institute of Geography and Earth SciencesLlandinam Building, Aberystwyth University, Aberystwyth SY23 3DB, UK

关键词: Cryoconite;    glacier;    Svalbard;    moraines;    niche;    T-RFLP;   

DOI  :  10.3402/polar.v32i0.19468

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Cryoconite holes are foci of unusually high microbial diversity and activity on glacier surfaces worldwide, comprising melt-holes formed by the darkening of ice by biogenic granular debris. Despite recent studies linking cryoconite microbial community structure to the functionality of cryoconite habitats, little is known of the processes shaping the cryoconite bacterial community. In particular, the assertions that the community is strongly influenced by aeolian transfer of biota from ice-marginal habitats and the potential for cryoconite microbes to inoculate proglacial habitats are poorly quantified despite their longevity in the literature. Therefore, the bacterial community structures of cryoconite holes on three High-Arctic glaciers were compared to bacterial communities in adjacent moraines and tundra using terminal-restriction fragment length polymorphism. Distinct community structures for cryoconite and ice-marginal communities were observed. Only a minority of phylotypes are present in both habit...

【 授权许可】

CC BY-NC