Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum
The thawing of ice-rich permafrost soils in northern peatlands leads to the formation of thermokarst ponds, surrounded by organic-rich soils. These aquatic ecosystems are sites of intense microbial activity, and CO(2) and CH(4) emissions. Many of the pond systems in northern landscapes and their sur...
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ftpubmed:oai:pubmedcentral.nih.gov:6920961 2023-05-15T16:37:49+02:00 Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum Vigneron, Adrien Cruaud, Perrine Bhiry, Najat Lovejoy, Connie Vincent, Warwick F. 2019-10-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920961/ http://www.ncbi.nlm.nih.gov/pubmed/31652931 https://doi.org/10.3390/microorganisms7110486 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920961/ http://www.ncbi.nlm.nih.gov/pubmed/31652931 http://dx.doi.org/10.3390/microorganisms7110486 © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2019 ftpubmed https://doi.org/10.3390/microorganisms7110486 2019-12-29T01:25:56Z The thawing of ice-rich permafrost soils in northern peatlands leads to the formation of thermokarst ponds, surrounded by organic-rich soils. These aquatic ecosystems are sites of intense microbial activity, and CO(2) and CH(4) emissions. Many of the pond systems in northern landscapes and their surrounding peatlands are hydrologically contiguous, but little is known about the microbial connectivity of concentric habitats around the thermokarst ponds, or the effects of peat accumulation and infilling on the microbial communities. Here we investigated microbial community structure and abundance in a thermokarst pond-peatland system in subarctic Canada. Several lineages were ubiquitous, supporting a prokaryotic continuum from the thermokarst pond to surrounding peatlands. However, the microbial community structure shifted from typical aerobic freshwater microorganisms (Betaproteobacteria and Alphaproteobacteria) in the pond towards acidophilic and anaerobic lineages (Acidobacteria and Choroflexi) in the connected peatland waters, likely selected by the acidification of the water by Sphagnum mosses. Marked changes in abundance and community composition of methane cycling microorganisms were detected along the thermokarst pond-peatland transects, suggesting fine tuning of C-1 carbon cycling within a highly connected system, and warranting the need for higher spatial resolution across the thermokarst landscape to accurately predict net greenhouse gas emissions from northern peatlands. Text Ice permafrost Subarctic Thermokarst PubMed Central (PMC) Canada Microorganisms 7 11 486 |
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Article Vigneron, Adrien Cruaud, Perrine Bhiry, Najat Lovejoy, Connie Vincent, Warwick F. Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum |
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description |
The thawing of ice-rich permafrost soils in northern peatlands leads to the formation of thermokarst ponds, surrounded by organic-rich soils. These aquatic ecosystems are sites of intense microbial activity, and CO(2) and CH(4) emissions. Many of the pond systems in northern landscapes and their surrounding peatlands are hydrologically contiguous, but little is known about the microbial connectivity of concentric habitats around the thermokarst ponds, or the effects of peat accumulation and infilling on the microbial communities. Here we investigated microbial community structure and abundance in a thermokarst pond-peatland system in subarctic Canada. Several lineages were ubiquitous, supporting a prokaryotic continuum from the thermokarst pond to surrounding peatlands. However, the microbial community structure shifted from typical aerobic freshwater microorganisms (Betaproteobacteria and Alphaproteobacteria) in the pond towards acidophilic and anaerobic lineages (Acidobacteria and Choroflexi) in the connected peatland waters, likely selected by the acidification of the water by Sphagnum mosses. Marked changes in abundance and community composition of methane cycling microorganisms were detected along the thermokarst pond-peatland transects, suggesting fine tuning of C-1 carbon cycling within a highly connected system, and warranting the need for higher spatial resolution across the thermokarst landscape to accurately predict net greenhouse gas emissions from northern peatlands. |
format |
Text |
author |
Vigneron, Adrien Cruaud, Perrine Bhiry, Najat Lovejoy, Connie Vincent, Warwick F. |
author_facet |
Vigneron, Adrien Cruaud, Perrine Bhiry, Najat Lovejoy, Connie Vincent, Warwick F. |
author_sort |
Vigneron, Adrien |
title |
Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum |
title_short |
Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum |
title_full |
Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum |
title_fullStr |
Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum |
title_full_unstemmed |
Microbial Community Structure and Methane Cycling Potential along a Thermokarst Pond-Peatland Continuum |
title_sort |
microbial community structure and methane cycling potential along a thermokarst pond-peatland continuum |
publisher |
MDPI |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920961/ http://www.ncbi.nlm.nih.gov/pubmed/31652931 https://doi.org/10.3390/microorganisms7110486 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ice permafrost Subarctic Thermokarst |
genre_facet |
Ice permafrost Subarctic Thermokarst |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920961/ http://www.ncbi.nlm.nih.gov/pubmed/31652931 http://dx.doi.org/10.3390/microorganisms7110486 |
op_rights |
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/microorganisms7110486 |
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Microorganisms |
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7 |
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11 |
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486 |
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1766028106479435776 |