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Description of spatial and temporal distributions of epiphytic lichens
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
2008 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

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.

Place, publisher, year, edition, pages
Institutionen för fysik, kemi och biologi , 2008. , 16 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1348
Keyword [en]
centroid, continuity, lichen, movement, range shift, direction, dispersal, ecological continuity, establishment, global change, global warming, habitat availability, håkan lättman
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-11561ISBN: 978-91-7393-967-6 (print)OAI: oai:DiVA.org:liu-11561DiVA: diva2:17991
Presentation
2008-04-11, Schrödinger E324, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2008-04-17 Created: 2008-04-17 Last updated: 2014-10-08
List of papers
1. Habitat availability is likely to limit the occurrence of the rare lichen Cliostomum corrugatum
Open this publication in new window or tab >>Habitat availability is likely to limit the occurrence of the rare lichen Cliostomum corrugatum
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2008 (English)Article in journal (Refereed) Submitted
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-13182 (URN)
Available from: 2008-04-17 Created: 2008-04-17 Last updated: 2014-10-08
2. Spatio-temporal range shift of epiphytic lichens within a distribution area
Open this publication in new window or tab >>Spatio-temporal range shift of epiphytic lichens within a distribution area
2008 (English)Article in journal (Refereed) Submitted
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-13183 (URN)
Available from: 2008-04-17 Created: 2008-04-17 Last updated: 2014-10-08

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Lättman, Håkan

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