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Declining fungal diversity in Arctic freshwaters along a permafrost thaw gradient
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- Kluge, Mariana (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Department of Forest Mycology and Plant Pathology,Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden.
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- Wauthy, Maxime (author)
- Univ Quebec Chicoutimi, Dept Sci Fondamentales, Saguenay, PQ, Canada.;Univ Laval, Ctr Northern Studies CEN, Quebec City, PQ, Canada.
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- Engelbrecht Clemmensen, Karina (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Department of Forest Mycology and Plant Pathology,Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden.
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- Wurzbacher, Christian (author)
- Tech Univ Munich, Chair Urban Water Syst Engn, Garching, Germany.
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- Hawkes, Jeffrey A. (author)
- Uppsala universitet,Analytisk kemi
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- Einarsdóttir, Karólina, 1980- (author)
- Uppsala universitet,Limnologi
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- Rautio, Milla (author)
- Univ Quebec Chicoutimi, Dept Sci Fondamentales, Saguenay, PQ, Canada.;Univ Laval, Ctr Northern Studies CEN, Quebec City, PQ, Canada.;Univ Montreal, Grp Interuniv Res Limnol & Aquat Environm GRIL, Montreal, PQ, Canada.
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- Stenlid, Jan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Department of Forest Mycology and Plant Pathology,Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden.
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- Peura, Sari (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Department of Forest Mycology and Plant Pathology,Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden.
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(creator_code:org_t)
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- 2021-08-30
- English.
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In: Global Change Biology. - : John Wiley & Sons. - 1354-1013 .- 1365-2486. ; 27:22, s. 5889-5906
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Abstract
Subject headings
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- Climate change-driven permafrost thaw has a strong influence on pan-Arctic regions, via, for example, the formation of thermokarst ponds. These ponds are hotspots of microbial carbon cycling and greenhouse gas production, and efforts have been put on disentangling the role of bacteria and archaea in recycling the increasing amounts of carbon arriving to the ponds from degrading watersheds. However, despite the well-established role of fungi in carbon cycling in the terrestrial environments, the interactions between permafrost thaw and fungal communities in Arctic freshwaters have remained unknown. We integrated data from 60 ponds in Arctic hydro-ecosystems, representing a gradient of permafrost integrity and spanning over five regions, namely Alaska, Greenland, Canada, Sweden, and Western Siberia. The results revealed that differences in pH and organic matter quality and availability were linked to distinct fungal community compositions and that a large fraction of the community represented unknown fungal phyla. Results display a 16%-19% decrease in fungal diversity, assessed by beta diversity, across ponds in landscapes with more degraded permafrost. At the same time, sites with similar carbon quality shared more species, aligning a shift in species composition with the quality and availability of terrestrial dissolved organic matter. We demonstrate that the degradation of permafrost has a strong negative impact on aquatic fungal diversity, likely via interactions with the carbon pool released from ancient deposits. This is expected to have implications for carbon cycling and climate feedback loops in the rapidly warming Arctic.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- aquatic fungi
- Arctic
- dissolved organic matter
- fungal diversity
- permafrost thaw
- thermokarst ponds
Publication and Content Type
- ref (subject category)
- art (subject category)
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