Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity
Little is known about the impact of changing temperature regimes on composition and diversity of cryptogam communities in the Arctic and Subarctic, despite the well-known importance of lichens and bryophytes to the functioning and climate feedbacks of northern ecosystems. We investigated changes in...
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ftunivwagenin:oai:library.wur.nl:wurpubs/413068 2024-02-04T09:56:23+01:00 Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity Lang, S.I. Cornelissen, J.H.C. Shaver, G.R. Ahrens, M. Callaghan, T.V. Molau, U. ter Braak, C.J.F. Hölzer, A. Aerts, R. 2012 application/pdf https://research.wur.nl/en/publications/arctic-warming-on-two-continents-has-consistent-negativ-effects-o https://doi.org/10.1111/j.1365-2486.2011.02570.x en eng https://edepot.wur.nl/186607 https://research.wur.nl/en/publications/arctic-warming-on-two-continents-has-consistent-negativ-effects-o doi:10.1111/j.1365-2486.2011.02570.x info:eu-repo/semantics/restrictedAccess Wageningen University & Research Global Change Biology 18 (2012) 3 ISSN: 1354-1013 biomass climate-change dwarf shrub heath ecosystems growth nitrogen mineralization plant community responses simulated environmental-change tundra vegetation info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2012 ftunivwagenin https://doi.org/10.1111/j.1365-2486.2011.02570.x 2024-01-10T23:21:25Z Little is known about the impact of changing temperature regimes on composition and diversity of cryptogam communities in the Arctic and Subarctic, despite the well-known importance of lichens and bryophytes to the functioning and climate feedbacks of northern ecosystems. We investigated changes in diversity and abundance of lichens and bryophytes within long-term (9–16 years) warming experiments and along natural climatic gradients, ranging from Swedish subarctic birch forest and subarctic/subalpine tundra to Alaskan arctic tussock tundra. In both Sweden and Alaska, lichen diversity responded negatively to experimental warming (with the exception of a birch forest) and to higher temperatures along climatic gradients. Bryophytes were less sensitive to experimental warming than lichens, but depending on the length of the gradient, bryophyte diversity decreased both with increasing temperatures and at extremely low temperatures. Among bryophytes, Sphagnum mosses were particularly resistant to experimental warming in terms of both abundance and diversity. Temperature, on both continents, was the main driver of species composition within experiments and along gradients, with the exception of the Swedish subarctic birch forest where amount of litter constituted the best explanatory variable. In a warming experiment in moist acidic tussock tundra in Alaska, temperature together with soil ammonium availability were the most important factors influencing species composition. Overall, dwarf shrub abundance (deciduous and evergreen) was positively related to warming but so were the bryophytes Sphagnum girgensohnii, Hylocomium splendens and Pleurozium schreberi; the majority of other cryptogams showed a negative relationship to warming. This unique combination of intercontinental comparison, natural gradient studies and experimental studies shows that cryptogam diversity and abundance, especially within lichens, is likely to decrease under arctic climate warming. Given the many ecosystem processes affected by cryptogams in ... Article in Journal/Newspaper Arctic Arctic Climate change Subarctic Tundra Alaska Wageningen UR (University & Research Centre): Digital Library Arctic Global Change Biology 18 3 1096 1107 |
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Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
biomass climate-change dwarf shrub heath ecosystems growth nitrogen mineralization plant community responses simulated environmental-change tundra vegetation |
spellingShingle |
biomass climate-change dwarf shrub heath ecosystems growth nitrogen mineralization plant community responses simulated environmental-change tundra vegetation Lang, S.I. Cornelissen, J.H.C. Shaver, G.R. Ahrens, M. Callaghan, T.V. Molau, U. ter Braak, C.J.F. Hölzer, A. Aerts, R. Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
topic_facet |
biomass climate-change dwarf shrub heath ecosystems growth nitrogen mineralization plant community responses simulated environmental-change tundra vegetation |
description |
Little is known about the impact of changing temperature regimes on composition and diversity of cryptogam communities in the Arctic and Subarctic, despite the well-known importance of lichens and bryophytes to the functioning and climate feedbacks of northern ecosystems. We investigated changes in diversity and abundance of lichens and bryophytes within long-term (9–16 years) warming experiments and along natural climatic gradients, ranging from Swedish subarctic birch forest and subarctic/subalpine tundra to Alaskan arctic tussock tundra. In both Sweden and Alaska, lichen diversity responded negatively to experimental warming (with the exception of a birch forest) and to higher temperatures along climatic gradients. Bryophytes were less sensitive to experimental warming than lichens, but depending on the length of the gradient, bryophyte diversity decreased both with increasing temperatures and at extremely low temperatures. Among bryophytes, Sphagnum mosses were particularly resistant to experimental warming in terms of both abundance and diversity. Temperature, on both continents, was the main driver of species composition within experiments and along gradients, with the exception of the Swedish subarctic birch forest where amount of litter constituted the best explanatory variable. In a warming experiment in moist acidic tussock tundra in Alaska, temperature together with soil ammonium availability were the most important factors influencing species composition. Overall, dwarf shrub abundance (deciduous and evergreen) was positively related to warming but so were the bryophytes Sphagnum girgensohnii, Hylocomium splendens and Pleurozium schreberi; the majority of other cryptogams showed a negative relationship to warming. This unique combination of intercontinental comparison, natural gradient studies and experimental studies shows that cryptogam diversity and abundance, especially within lichens, is likely to decrease under arctic climate warming. Given the many ecosystem processes affected by cryptogams in ... |
format |
Article in Journal/Newspaper |
author |
Lang, S.I. Cornelissen, J.H.C. Shaver, G.R. Ahrens, M. Callaghan, T.V. Molau, U. ter Braak, C.J.F. Hölzer, A. Aerts, R. |
author_facet |
Lang, S.I. Cornelissen, J.H.C. Shaver, G.R. Ahrens, M. Callaghan, T.V. Molau, U. ter Braak, C.J.F. Hölzer, A. Aerts, R. |
author_sort |
Lang, S.I. |
title |
Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
title_short |
Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
title_full |
Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
title_fullStr |
Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
title_full_unstemmed |
Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
title_sort |
arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity |
publishDate |
2012 |
url |
https://research.wur.nl/en/publications/arctic-warming-on-two-continents-has-consistent-negativ-effects-o https://doi.org/10.1111/j.1365-2486.2011.02570.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change Subarctic Tundra Alaska |
genre_facet |
Arctic Arctic Climate change Subarctic Tundra Alaska |
op_source |
Global Change Biology 18 (2012) 3 ISSN: 1354-1013 |
op_relation |
https://edepot.wur.nl/186607 https://research.wur.nl/en/publications/arctic-warming-on-two-continents-has-consistent-negativ-effects-o doi:10.1111/j.1365-2486.2011.02570.x |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1111/j.1365-2486.2011.02570.x |
container_title |
Global Change Biology |
container_volume |
18 |
container_issue |
3 |
container_start_page |
1096 |
op_container_end_page |
1107 |
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1789960919237787648 |