2013
DOI: 10.3402/polar.v32i0.19468
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Contrasts between the cryoconite and ice-marginal bacterial communities of Svalbard glaciers

Abstract: 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… Show more

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Cited by 52 publications
(57 citation statements)
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“…We estimated the observed richness (S obs ), Shannon diversity (H) and Gini coefficient (G), a measure of inequality where values close to 0 correspond to even communities (Dorfman, 1979;Edwards et al, 2013b), based on evenly rarefied OTU matrices (Bacteria: 3764 sequences; Fungi: 675 sequences). We assessed differences in α-diversity indices between exogenous and endogenous sources as well as among different soil habitats by performing a one-way analysis of variance (ANOVA) in R v.2.15 (R development Core Team, 2012).…”
Section: Statistical Analysesmentioning
confidence: 99%
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“…We estimated the observed richness (S obs ), Shannon diversity (H) and Gini coefficient (G), a measure of inequality where values close to 0 correspond to even communities (Dorfman, 1979;Edwards et al, 2013b), based on evenly rarefied OTU matrices (Bacteria: 3764 sequences; Fungi: 675 sequences). We assessed differences in α-diversity indices between exogenous and endogenous sources as well as among different soil habitats by performing a one-way analysis of variance (ANOVA) in R v.2.15 (R development Core Team, 2012).…”
Section: Statistical Analysesmentioning
confidence: 99%
“…Similar to our results, Naff et al (2013) observed that fungal zoospores affiliated to Chytrids differed between geographically close snowpacks. Further, Edwards et al (2013b) reported that fungal community structures differed between moraine debris, tundra…”
Section: Origin Of Microbial Pioneers In Deglaciated Soilsmentioning
confidence: 99%
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“…Cryoconite material sits upon and within a dynamic supraglacial weathering crust environment (Müller and Keeler, 1969), within which physical and hydrological influences act upon it, in addition to biogeochemical interactions. Radionuclide analysis (Tieber et al, 2009) and timelapse imagery (Irvine-Fynn et al, 2011) both suggest that, despite seasonal meltwater flow, cryoconite can reside on the ice surface for extended time periods, up to decades, thereby creating complex microbial community structures and promoting the development of niche communities and microenvironments (Edwards et al, 2013;Zarsky et al, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Given the variability of cryoconite microstructure between Arctic glaciers , and the development of niche communities and microenvironments (Edwards et al, 2013;Zarsky et al, 2013), even on adjacent glaciers, care must be taken as to the wider representativeness of the data analysed and discussed henceforth. This research employs a spectrophotometric approach, using 96-well plates and performing a variety of assays, to allow rapid, glacierwide determination of specific biochemical parameters -in !…”
Section: Introductionmentioning
confidence: 99%