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Large-scale occurrence patterns of red-listed lichens and fungi on old oaks are influenced both by current and historical habitat density

Ranius, Thomas and Eliasson, Per and Johansson, Per (2008). Large-scale occurrence patterns of red-listed lichens and fungi on old oaks are influenced both by current and historical habitat density. Biodiversity and conservation. 17:10, 2371-2381
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Official URL: http://www.springerlink.com/content/h863w6060488l1...

Abstract

Current occurrence patterns of species associated with ancient trees may reflect higher historical habitat densi-ties, because the dynamics of the habitat and the colonisation-extinction processes for many inhabiting species are expected to be slow. We tested this hypothesis in southeast Sweden by analysing species occurrence per parish for twelve redlisted lichen species and nine redlisted fungus species in relation with current density of big oaks, the density of oaks in the 1830’s and connectivity with parishes with the species present. For most species, the occurrence was positively related with current density of habitat (for 18 species out of 21) and parish area (for 16 species). Historical habitat density was positively related with occurrence for 11 species, while connec-tivity with current occurrences in the surroundings was positive for the occurrence of 12 species and negative for the occurrence of 2. For lichen species the connectivity measure that best explained the variation was at a larger spatial scale as compared to fungus species. Even if the density of old oaks remains in the future, inhabit-ing species will most likely decline because their distribution patterns are not in equilibrium with the current habitat density. Therefore, to allow long-term persistence of inhabiting species the number of old oaks should be increased. Areas where such an increase is most urgent could be identified based on species occurrence data and current habitat density, but because species data will always be incomplete data on the historical habitat distribution is valuable.

Authors/Creators:Ranius, Thomas and Eliasson, Per and Johansson, Per
Title:Large-scale occurrence patterns of red-listed lichens and fungi on old oaks are influenced both by current and historical habitat density
Series/Journal:Biodiversity and conservation (0960-3115)
Year of publishing :2008
Volume:17
Number:10
Page range:2371-2381
Publisher:Springer
ISSN:0960-3115
Language:English
Additional Information:Published by Springer in Biodiversity and Conservation. DOI: 10.1007/s10531-008-9387-3
Publication Type:Journal article
Refereed:Yes
Full Text Status:Public
Subjects:Obsolete subject words > NATURAL SCIENCES > Biology > Organism biology
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Keywords:connectivity, epiphytic lichens, extinction debt, habitat history, habitat loss, Quercus robur, saproxylic fungi
URN:NBN:urn:nbn:se:slu:epsilon-8-1002
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-1002
ID Code:5818
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: Thomas Ranius
Deposited On:08 Mar 2011 00:00
Metadata Last Modified:02 Dec 2014 10:44

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