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Description of spat...
Description of spatial and temporal distributions of epiphytic lichens
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- Lättman, Håkan, 1958- (författare)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
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- Milberg, Per (preses)
- Linköpings universitet,Ekologi,Tekniska högskolan
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- Jonsson, Bengt Gunnar, Professor (opponent)
- Mittuniversitetet
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(creator_code:org_t)
- ISBN 9789173939676
- Institutionen för fysik, kemi och biologi, 2008
- Engelska 16 s.
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Serie: Linköping Studies in Science and Technology. Thesis, 0280-7971 ; 1348
- Relaterad länk:
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Abstract
Ämnesord
Stäng
- Lichens are, in most cases, sensitive to anthropogenic factors such as air pollution, global warming, forestry and fragmentation. Two studies are included in this thesis. The first is an evaluation of the importance of old oak for the rare epiphytic lichen Cliostomum corrugatum (Ach.) Fr. This study analysed whether C. corrugatum was limited by dispersal or restricted to tree stands with an unbroken continuity or the substrate old oaks. The results provide evidence that the investigated five populations in Östergötland, Sweden, of C. corrugatum exhibit substantial gene flow, an effective dispersal and a small genetic variation between the sites. Most of the genetic variation was within the populations. Thus, C. corrugatum is more dependent of the substrate old oaks, rather than limited by dispersal. The second study investigated possible range shift of some common macrolichens, due to global warming, from 64 sites in southern Sweden comparing the two years 1986 and 2003. The centroid of three lichen species had moved a significant distance, all in a north east direction: Hypogymnia physodes (L.) Nyl. and Vulpicida pinastri (Scop.) J.-E. Mattsson and M. J. Lai on the tree species Juniperus communis L. (50 and 151 km, respectively) and H. physodes on Pinus sylvestris L. (41 km). Considering also the non-significant cases, there is strong evidence for a prevailing NE direction of centroid movement.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Nyckelord
- centroid
- continuity
- lichen
- movement
- range shift
- direction
- dispersal
- ecological continuity
- establishment
- global change
- global warming
- habitat availability
- håkan lättman
- Biology
- Biologi
Publikations- och innehållstyp
- vet (ämneskategori)
- lic (ämneskategori)
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