Microbial community responses to freeze
Permafrost affected soils are a vast pool of Carbon, storing around 1300Pg below the ground. As a result of climate change, permafrost soils that have been frozen for thousands of years are thawing, causing the ancient organic matter to be metabolised by microorgan-isms. Moisture content of soils ha...
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ftsluppsalast:oai:stud.epsilon.slu.se:15240 2023-05-15T15:07:04+02:00 Microbial community responses to freeze Gough, Isabelle 2019-12-03 application/pdf https://stud.epsilon.slu.se/15240/7/gough_i_191129.pdf sv eng swe eng https://stud.epsilon.slu.se/15240/ urn:nbn:se:slu:epsilon-s-15240 https://stud.epsilon.slu.se/15240/7/gough_i_191129.pdf Gough, Isabelle, 2019. Microbial community responses to freeze : thaw cycles in active layer soils of permafrost tundra, Disko Island, Greenland. Second cycle, A2E. Uppsala: (NL, NJ) > Dept. of Soil and Environment <https://stud.epsilon.slu.se/view/divisions/OID-435.html> Soil chemistry and physics Second cycle, A2E NonPeerReviewed 2019 ftsluppsalast 2022-09-10T18:12:32Z Permafrost affected soils are a vast pool of Carbon, storing around 1300Pg below the ground. As a result of climate change, permafrost soils that have been frozen for thousands of years are thawing, causing the ancient organic matter to be metabolised by microorgan-isms. Moisture content of soils has an impact on microbial community activity, but the mechanism of this effect is poorly understood. This study sought to explore the effect of microbial alpha and beta diversity, microbial activity, and greenhouse gas production respond to thaw in wet and dry soils in the Arctic. Soils were selected from a wet fen and dry sedge heath from Disko Island, Greenland to test the effect of soil type on thaw. Microbial community dynamics were studied over the thaw period using amplicon sequencing of 16S (bacteria) and ITS (fungi). It was found that although alpha and beta diversity did not sig-nificantly respond to thaw, enzyme activity did have an effect, sug-gesting that microbial community behaviour had been affected. The impact of this on greenhouse gas fluxes were that the dry soil became a sink of CO2, N2O and CH4, whereas the wet soils became a source of all three gases. This finding indicates that moisture regime will play a large role in whether artic soils will contribute to climate feedbacks upon thawing. Text Arctic Climate change Greenland permafrost Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects Arctic Greenland |
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Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects |
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Swedish English |
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Soil chemistry and physics |
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Soil chemistry and physics Gough, Isabelle Microbial community responses to freeze |
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Soil chemistry and physics |
description |
Permafrost affected soils are a vast pool of Carbon, storing around 1300Pg below the ground. As a result of climate change, permafrost soils that have been frozen for thousands of years are thawing, causing the ancient organic matter to be metabolised by microorgan-isms. Moisture content of soils has an impact on microbial community activity, but the mechanism of this effect is poorly understood. This study sought to explore the effect of microbial alpha and beta diversity, microbial activity, and greenhouse gas production respond to thaw in wet and dry soils in the Arctic. Soils were selected from a wet fen and dry sedge heath from Disko Island, Greenland to test the effect of soil type on thaw. Microbial community dynamics were studied over the thaw period using amplicon sequencing of 16S (bacteria) and ITS (fungi). It was found that although alpha and beta diversity did not sig-nificantly respond to thaw, enzyme activity did have an effect, sug-gesting that microbial community behaviour had been affected. The impact of this on greenhouse gas fluxes were that the dry soil became a sink of CO2, N2O and CH4, whereas the wet soils became a source of all three gases. This finding indicates that moisture regime will play a large role in whether artic soils will contribute to climate feedbacks upon thawing. |
format |
Text |
author |
Gough, Isabelle |
author_facet |
Gough, Isabelle |
author_sort |
Gough, Isabelle |
title |
Microbial community responses to freeze |
title_short |
Microbial community responses to freeze |
title_full |
Microbial community responses to freeze |
title_fullStr |
Microbial community responses to freeze |
title_full_unstemmed |
Microbial community responses to freeze |
title_sort |
microbial community responses to freeze |
publishDate |
2019 |
url |
https://stud.epsilon.slu.se/15240/7/gough_i_191129.pdf |
geographic |
Arctic Greenland |
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Arctic Greenland |
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Arctic Climate change Greenland permafrost |
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Arctic Climate change Greenland permafrost |
op_relation |
https://stud.epsilon.slu.se/15240/ urn:nbn:se:slu:epsilon-s-15240 https://stud.epsilon.slu.se/15240/7/gough_i_191129.pdf Gough, Isabelle, 2019. Microbial community responses to freeze : thaw cycles in active layer soils of permafrost tundra, Disko Island, Greenland. Second cycle, A2E. Uppsala: (NL, NJ) > Dept. of Soil and Environment <https://stud.epsilon.slu.se/view/divisions/OID-435.html> |
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