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Extinction debt in fragmented grasslands: paid or not?
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK). (landscape ecology)
2009 (engelsk)Inngår i: Journal of Vegetation Science, ISSN 1100-9233, E-ISSN 1654-1103, Vol. 20, nr 1, s. 3-7Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Fragmentation of grasslands and forests is considered amajor threat to biodiversity. In the case of plants, theeffect of fragmentation or landscape context is still unclearand published results are divergent. One explanation forthis divergence is the slow response of long-lived plants,creating an extinction debt. However, this has not beenempirically confirmed. In this study, data were compiledfrom broad-scale studies of grasslands from throughoutthe world that relate plant diversity to fragmentationeffects. Only seven studies from northern Europe, out ofa total 61, gave any information on actual habitat fragmentationin time and space. In landscapes with 410%grassland remaining, present-day species richness wasrelated to past landscape or habitat pattern. In landscapeswith o10% grassland remaining, in contrast, plant speciesrichness was more related to contemporary landscapeor habitat pattern. Studies from landscapes with 410%grassland remaining supported the concept of an extinctiondebt, while studies from more fragmented landscapesdid not provide any evidence of an extinction debt. Inorder to make generalisations about historical legacies onspecies diversity in grasslands it is important to consider arange of highly transformed landscapes, and not onlylandscapes with a high amount of grassland remaining.

sted, utgiver, år, opplag, sider
2009. Vol. 20, nr 1, s. 3-7
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URN: urn:nbn:se:su:diva-28546DOI: 10.1111/j.1654-1103.2009.05647.xISI: 000263701500002OAI: oai:DiVA.org:su-28546DiVA, id: diva2:225063
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FormasTilgjengelig fra: 2009-06-24 Laget: 2009-06-24 Sist oppdatert: 2017-12-13bibliografisk kontrollert

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