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dc.contributor.author Cornelissen, J. Hans C.
dc.contributor.author Callaghan, Terry V.
dc.contributor.author Alatalo, J. M.
dc.contributor.author Michelsen, A.
dc.contributor.author Graglia, E.
dc.contributor.author Hartley, A. E.
dc.contributor.author Hik, D. S.
dc.contributor.author Hobbie, S. E.
dc.contributor.author Press, M. C.
dc.contributor.author Robinson, C. H.
dc.contributor.author Henry, G. H. R.
dc.contributor.author Shaver, G. R.
dc.contributor.author Phoenix, Gareth K.
dc.contributor.author Gwynn-Jones, Dylan
dc.contributor.author Jonasson, Sven E.
dc.contributor.author Chapin III, F. S.
dc.contributor.author Molau, U.
dc.contributor.author Neill, C.
dc.contributor.author Lee, J. A.
dc.contributor.author Melillo, J. M.
dc.contributor.author Sveinbjörnsson, B.
dc.contributor.author Aerts, Rien
dc.date.accessioned 2009-11-03T15:44:59Z
dc.date.available 2009-11-03T15:44:59Z
dc.date.issued 2001-12
dc.identifier.citation Cornelissen , J H C , Callaghan , T V , Alatalo , J M , Michelsen , A , Graglia , E , Hartley , A E , Hik , D S , Hobbie , S E , Press , M C , Robinson , C H , Henry , G H R , Shaver , G R , Phoenix , G K , Gwynn-Jones , D , Jonasson , S E , Chapin III , F S , Molau , U , Neill , C , Lee , J A , Melillo , J M , Sveinbjörnsson , B & Aerts , R 2001 , ' Global change and arctic ecosystems: is lichen decline a function of increases in vascular plant biomass ' Journal of Ecology , vol 89 , no. 6 , pp. 984-994 . , 10.1111/j.1365-2745.2001.00625.x en
dc.identifier.issn 0022-0477
dc.identifier.other PURE: 127023
dc.identifier.other dspace: 2160/3415
dc.identifier.uri http://hdl.handle.net/2160/3415
dc.description Cornelissen, J. H. C., Callaghan, T. V., Alatalo, J. M., Michelsen, A., Graglia, E., Hartley, A. E., Hik, D. S., Hobbie, S. E., Press, M. C., Robinson, C. H., Henry, G. H. R. (2001). Global change and arctic ecosystems: is lichen decline a function of increases in vascular plant biomass.   Journal of Ecology, 89, (6), 984-994. Sponsorship: Swedish Natural Science Research Council (NFR)/Swedish Environmental Protection Agency (two grants)/ US National Science Foundation (four grants)/ the Danish Natural Science Research Council (two grants)/ NASA (Global Change Fellowship), NSERC (Canada, two grants)/the Natural Environment Research Council (UJ, two grants)/ the 'Stiftelse för Oscar & Lilli Lamms Minne' (Sweden) / ESRC (Global Change Research Council). en
dc.description.abstract Macrolichens are important for the functioning and biodiversity of cold northern ecosystems and their reindeer-based cultures and economies. 2We 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. 3Regressions 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). 4Seven 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. 5We 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. 6However, 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. en
dc.format.extent 11 en
dc.language.iso eng
dc.relation.ispartof Journal of Ecology en
dc.subject arctic en
dc.subject ecosystem manipulation experiment en
dc.subject macrolichen en
dc.subject nutrient availability en
dc.subject vascular plant en
dc.subject warming en
dc.title Global change and arctic ecosystems: is lichen decline a function of increases in vascular plant biomass en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1111/j.1365-2745.2001.00625.x
dc.contributor.institution Aberystwyth University en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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