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Decreased soil mois...
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Scharn, RuudGothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
(author)
Decreased soil moisture due to warming drives community transitions in the tundra
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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2021-05-24
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IOP Publishing,2021
Numbers
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LIBRIS-ID:oai:gup.ub.gu.se/304445
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https://gup.ub.gu.se/publication/304445URI
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https://doi.org/10.1088/1748-9326/abfe8aDOI
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Global warming leads to drastic changes in the diversity and structure of Arctic plant communities. Studies of functional diversity within the Arctic tundra biome have improved our understanding of plant responses to warming. However, these studies still show substantial unexplained variation in diversity responses. Complementary to functional diversity, phylogenetic diversity has been useful in climate change studies, but has so far been understudied in the Arctic. Here, we use a 25-year warming experiment to disentangle community responses in Arctic plant phylogenetic diversity across a soil moisture gradient. We found that responses varied over the soil moisture gradient, where meadow communities with intermediate to high soil moisture had a higher magnitude of response. Warming had a negative effect on soil moisture levels in all meadow communities, however meadows with intermediate moisture levels were more sensitive. In these communities, soil moisture loss was associated with earlier snowmelt, resulting in community turnover towards a more heath-like community. This process of "heathification" in the intermediate moisture meadows was driven by the expansion of ericoid and Betula shrubs. In contrast, under a more consistent water supply Salix shrub abundance increased in wet meadows. Due to its lower stature, palatability and decomposability, the increase in heath relative to meadow vegetation can have several large scale effects on the local food web as well as climate. Our study highlights the importance of the hydrological cycle as a driver of vegetation turnover in response to Arctic climate change. The observed patterns in phylogenetic diversity were often driven by contrasting responses of species of the same functional growth form, and could thus provide important complementary information. Thus, phylogenetic diversity is an important tool in disentangling tundra response to environmental change.
Subject headings and genre
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Little, Chelsea J.
(author)
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Bacon, Christine D.Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xbacoc
(author)
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Alatalo, Juha M.,1900
(author)
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Antonelli, Alexandre,1978Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xantal
(author)
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Björkman, Mats P.,1978Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences(Swepub:gu)xbjmat
(author)
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Molau, Ulf,1951Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xmoulf
(author)
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Nilsson, R. Henrik,1976Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences(Swepub:gu)xnihen
(author)
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Björk, Robert G.,1974Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences(Swepub:gu)xbjoro
(author)
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Göteborgs universitetInstitutionen för geovetenskaper
(creator_code:org_t)
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In:Environmental Research Letters: IOP Publishing16:61748-9326
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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Environmental Re ...
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University of Gothenburg