Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra
Abstract Many Arctic regions are currently experiencing substantial summer and winter climate changes. Litter decomposition is a fundamental component of ecosystem carbon and nutrient cycles, with fungi being among the primary decomposers. To assess the impacts of seasonal climatic changes on litter...
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Online Access: | http://dx.doi.org/10.1111/gcb.13362 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.13362 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.13362 |
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crwiley:10.1111/gcb.13362 2024-05-19T07:36:02+00:00 Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra Christiansen, Casper T. Haugwitz, Merian S. Priemé, Anders Nielsen, Cecilie S. Elberling, Bo Michelsen, Anders Grogan, Paul Blok, Daan Natural Sciences and Engineering Research Council of Canada Danmarks Grundforskningsfond 2016 http://dx.doi.org/10.1111/gcb.13362 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.13362 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.13362 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 23, issue 1, page 406-420 ISSN 1354-1013 1365-2486 General Environmental Science Ecology Environmental Chemistry Global and Planetary Change journal-article 2016 crwiley https://doi.org/10.1111/gcb.13362 2024-04-22T07:35:34Z Abstract Many Arctic regions are currently experiencing substantial summer and winter climate changes. Litter decomposition is a fundamental component of ecosystem carbon and nutrient cycles, with fungi being among the primary decomposers. To assess the impacts of seasonal climatic changes on litter fungal communities and their functioning, Betula glandulosa leaf litter was surface‐incubated in two adjacent low Arctic sites with contrasting soil moisture regimes: dry shrub heath and wet sedge tundra at Disko Island, Greenland. At both sites, we investigated the impacts of factorial combinations of enhanced summer warming (using open‐top chambers; OTC s) and deepened snow (using snow fences) on surface litter mass loss, chemistry and fungal decomposer communities after approximately 1 year. Enhanced summer warming significantly restricted litter mass loss by 32% in the dry and 17% in the wet site. Litter moisture content was significantly reduced by summer warming in the dry, but not in the wet site. Likewise, fungal total abundance and diversity were reduced by OTC warming at the dry site, while comparatively modest warming effects were observed in the wet site. These results suggest that increased evapotranspiration in the OTC plots lowered litter moisture content to the point where fungal decomposition activities became inhibited. In contrast, snow addition enhanced fungal abundance in both sites but did not significantly affect litter mass loss rates. Across sites, control plots only shared 15% of their fungal phylotypes, suggesting strong local controls on fungal decomposer community composition. Nevertheless, fungal community functioning (litter decomposition) was negatively affected by warming in both sites. We conclude that although buried soil organic matter decomposition is widely expected to increase with future summer warming, surface litter decay and nutrient turnover rates in both xeric and relatively moist tundra are likely to be significantly restricted by the evaporative drying associated with ... Article in Journal/Newspaper Arctic Greenland Tundra Wiley Online Library Global Change Biology 23 1 406 420 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
topic |
General Environmental Science Ecology Environmental Chemistry Global and Planetary Change |
spellingShingle |
General Environmental Science Ecology Environmental Chemistry Global and Planetary Change Christiansen, Casper T. Haugwitz, Merian S. Priemé, Anders Nielsen, Cecilie S. Elberling, Bo Michelsen, Anders Grogan, Paul Blok, Daan Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
topic_facet |
General Environmental Science Ecology Environmental Chemistry Global and Planetary Change |
description |
Abstract Many Arctic regions are currently experiencing substantial summer and winter climate changes. Litter decomposition is a fundamental component of ecosystem carbon and nutrient cycles, with fungi being among the primary decomposers. To assess the impacts of seasonal climatic changes on litter fungal communities and their functioning, Betula glandulosa leaf litter was surface‐incubated in two adjacent low Arctic sites with contrasting soil moisture regimes: dry shrub heath and wet sedge tundra at Disko Island, Greenland. At both sites, we investigated the impacts of factorial combinations of enhanced summer warming (using open‐top chambers; OTC s) and deepened snow (using snow fences) on surface litter mass loss, chemistry and fungal decomposer communities after approximately 1 year. Enhanced summer warming significantly restricted litter mass loss by 32% in the dry and 17% in the wet site. Litter moisture content was significantly reduced by summer warming in the dry, but not in the wet site. Likewise, fungal total abundance and diversity were reduced by OTC warming at the dry site, while comparatively modest warming effects were observed in the wet site. These results suggest that increased evapotranspiration in the OTC plots lowered litter moisture content to the point where fungal decomposition activities became inhibited. In contrast, snow addition enhanced fungal abundance in both sites but did not significantly affect litter mass loss rates. Across sites, control plots only shared 15% of their fungal phylotypes, suggesting strong local controls on fungal decomposer community composition. Nevertheless, fungal community functioning (litter decomposition) was negatively affected by warming in both sites. We conclude that although buried soil organic matter decomposition is widely expected to increase with future summer warming, surface litter decay and nutrient turnover rates in both xeric and relatively moist tundra are likely to be significantly restricted by the evaporative drying associated with ... |
author2 |
Natural Sciences and Engineering Research Council of Canada Danmarks Grundforskningsfond |
format |
Article in Journal/Newspaper |
author |
Christiansen, Casper T. Haugwitz, Merian S. Priemé, Anders Nielsen, Cecilie S. Elberling, Bo Michelsen, Anders Grogan, Paul Blok, Daan |
author_facet |
Christiansen, Casper T. Haugwitz, Merian S. Priemé, Anders Nielsen, Cecilie S. Elberling, Bo Michelsen, Anders Grogan, Paul Blok, Daan |
author_sort |
Christiansen, Casper T. |
title |
Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
title_short |
Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
title_full |
Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
title_fullStr |
Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
title_full_unstemmed |
Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
title_sort |
enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/gcb.13362 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.13362 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.13362 |
genre |
Arctic Greenland Tundra |
genre_facet |
Arctic Greenland Tundra |
op_source |
Global Change Biology volume 23, issue 1, page 406-420 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.13362 |
container_title |
Global Change Biology |
container_volume |
23 |
container_issue |
1 |
container_start_page |
406 |
op_container_end_page |
420 |
_version_ |
1799475057013030912 |