Carbon and nitrogen biogeochemical cycling potentials of supraglacial cryoconite communities

Cameron, Karen A. and Hodson, Andrew J. and Osborn, A. Mark (2012) Carbon and nitrogen biogeochemical cycling potentials of supraglacial cryoconite communities. Polar Biology, 35 (9). pp. 1375-1393. ISSN 0722-4060

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Official URL: http://dx.doi.org/10.1007/s00300-012-1178-3

Abstract

Microorganisms have a crucial role to play in the cycling of nutrients within glacial environments. These systems are often nutrient-limited, and so biogeochemical reactions, which ensure the availability of nutrients for microbial communities, are critical for the maintenance of these systems. This study uses molecular biology to characterise the supraglacial cryoconite microbial communities that are capable of cycling carbon and nitrogen in a range of glacial environments. Organisms with the potential to photosynthesise were identified, including Cyanobacteria, Actinobacteria, Betaproteobacteria, Stramenopiles and Haptophyceae. Organisms with the potential to perform nitrification and denitrification processes were also identified and featured Betaproteobacteria, Alphaproteobacteria, Thaumarchaeota and Cyanobacteria. While it is unlikely that the chemical and physical parameters of the supraglacial environment will facilitate optimal rates of all of the nitrogen-related biogeochemical processes, the transport of these cryoconite communities to downstream locations, where more favourable conditions may prevail, will perhaps provide a valuable inoculation of microorganisms with the genetic potential to catalyse these reactions elsewhere.

Item Type:Article
Additional Information:Microorganisms have a crucial role to play in the cycling of nutrients within glacial environments. These systems are often nutrient-limited, and so biogeochemical reactions, which ensure the availability of nutrients for microbial communities, are critical for the maintenance of these systems. This study uses molecular biology to characterise the supraglacial cryoconite microbial communities that are capable of cycling carbon and nitrogen in a range of glacial environments. Organisms with the potential to photosynthesise were identified, including Cyanobacteria, Actinobacteria, Betaproteobacteria, Stramenopiles and Haptophyceae. Organisms with the potential to perform nitrification and denitrification processes were also identified and featured Betaproteobacteria, Alphaproteobacteria, Thaumarchaeota and Cyanobacteria. While it is unlikely that the chemical and physical parameters of the supraglacial environment will facilitate optimal rates of all of the nitrogen-related biogeochemical processes, the transport of these cryoconite communities to downstream locations, where more favourable conditions may prevail, will perhaps provide a valuable inoculation of microorganisms with the genetic potential to catalyse these reactions elsewhere.
Keywords:Glacier, Cryoconite, Microbial diversity, Biogeochemical, Carbon, Nitrogen, carbon cycle, catalysis, denitrification, glacial environment, inoculation, microbial community, nitrogen cycle, nutrient availability, photosynthesis, species diversity, Actinobacteria, Alphaproteobacteria, Betaproteobacteria, Cyanobacteria, Haptophyceae, stramenopiles
Subjects:C Biological Sciences > C180 Ecology
C Biological Sciences > C500 Microbiology
Divisions:College of Science > School of Life Sciences
ID Code:6734
Deposited By:INVALID USER
Deposited On:30 Oct 2012 21:09
Last Modified:21 Apr 2013 10:51

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