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Global change and a...
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Cornelissen, CVrije Univ Amsterdam
(author)
Global change and arctic ecosystems : is lichen decline a function of increases in vascular plant biomass?
- Article/chapterEnglish2001
Publisher, publication year, extent ...
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2004-01-23
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Wiley,2001
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:mdh-10268
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https://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10268URI
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https://doi.org/10.1111/j.1365-2745.2001.00625.xDOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202959URI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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1 Macrolichens are important for the functioning and biodiversity of cold northern ecosystems and their reindeer-based cultures and economics. 2 We hypothesized that, in climatically milder parts of the Arctic, where ecosystems have relatively dense plant canopies, climate warming and/or increased nutrient availability leads to decline in macrolichen abundance as a function of increased abundance of vascular plants. In more open high-arctic or arctic-alpine plant communities such a relationship should be absent. To test this, we synthesized cross-continental arctic vegetation data from ecosystem manipulation experiments simulating mostly warming and increased nutrient availability, and compared these with similar data from natural environmental gradients. 3 Regressions between abundance or biomass of macrolichens and vascular plants were consistently negative across the subarctic and mid-arctic experimental studies. Such a pattern did not emerge in the coldest high-arctic or arctic-alpine sites. The slopes of the negative regressions increased across 10 sites as the climate became milder (as indicated by a simple climatic index) or the vegetation denser (greater site above-ground biomass). 4 Seven natural vegetation gradients in the lower-altitude sub- and mid-arctic zone confirmed the patterns seen in the experimental studies, showing consistent negative relationships between abundance of macrolichens and vascular plants. 5 We conclude that the data supported the hypothesis. Macrolichens in climatically milder arctic ecosystems may decline if and where global changes cause vascular plants to increase in abundance. 6 However, a refining of our findings is needed, for instance by integrating other abiotic and biotic effects such as reindeer grazing feedback on the balance between vascular plants and lichens.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Callaghan, V
(author)
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Alatalo, Juha,1966-Göteborgs Universitet(Swepub:uu)juhal964
(author)
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Michelsen, A
(author)
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Graglia, E
(author)
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Hartley, E
(author)
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Hik, S
(author)
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Hobbie, E
(author)
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Press, C
(author)
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Robinson, H
(author)
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Henry, R
(author)
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Shaver, R
(author)
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Phoenix, K
(author)
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Jones, G
(author)
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Jonasson, S
(author)
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Chapin, S
(author)
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Molau, U
(author)
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Neill, C
(author)
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Lee, A
(author)
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Melillo, M
(author)
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Sveinbjornsson, B
(author)
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Aerts, R
(author)
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Vrije Univ AmsterdamGöteborgs Universitet
(creator_code:org_t)
Related titles
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In:Journal of Ecology: Wiley89:6, s. 984-9940022-04771365-2745
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- By the author/editor
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Cornelissen, C
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Callaghan, V
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Alatalo, Juha, 1 ...
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Michelsen, A
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Graglia, E
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Hartley, E
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Hik, S
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Hobbie, E
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Press, C
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Robinson, H
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Henry, R
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Shaver, R
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Phoenix, K
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Jones, G
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Jonasson, S
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Chapin, S
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Molau, U
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Neill, C
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Lee, A
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Melillo, M
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Sveinbjornsson, ...
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Aerts, R
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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Journal of Ecolo ...
- By the university
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Mälardalen University
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Uppsala University