Temporal variability of bacterial communities in cryoconite on an alpine glacier
| Autor: | Federico Navarra, Giuseppina Bestetti, Andrea Franzetti, Umberto Minora, Isabella Gandolfi, Roberto Sergio Azzoni, Ilario Tagliaferri, Roberto Ambrosini, Guglielmina Diolaiuti, Claudio Smiraglia |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Ecology Community structure Glacier Biology 01 natural sciences Agricultural and Biological Sciences (miscellaneous) 03 medical and health sciences 030104 developmental biology chemistry Abundance (ecology) Cryoconite Snowmelt Cryosphere Organic matter Autotroph Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Environmental Microbiology Reports. 9:71-78 |
| ISSN: | 1758-2229 |
| DOI: | 10.1111/1758-2229.12499 |
| Popis: | Summary Cryoconite holes, i.e. small ponds that form on glacier surface, are considered the most biologically active environments on glaciers. Bacterial communities in these environments have been extensively studied, but often through snapshot studies based on the assumption of a general stability of community structure. In this study, we investigated the temporal variation of bacterial communities in cryoconite holes on the Forni Glacier (Italian Alps) by high throughput DNA sequencing. We found a temporal change of bacterial communities, with autotrophic Cyanobacteria populations dominating communities after snowmelt, and heterotrophic Sphingobacteriales populations increasing in abundance later in the season. Bacterial communities also varied according to hole depth and area, amount of organic matter in the cryoconite and oxygen concentration. However, variation in environmental features explained a lower fraction of the variation in bacterial communities than temporal variation. Temporal change along ablation season seems therefore more important than local environmental conditions in shaping bacterial communities of cryoconite of the Forni Glacier. These findings challenge the assumption that bacterial communities of cryoconite holes are stable. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|