Research article - Peer-reviewed, 2008
Restricted dispersal in a flying beetle assessed by telemetry
Hedin, Jonas; Ranius, Thomas; Nilsson, Sven G.; Smith, Henrik G.Abstract
Many insects living in ancient trees are assumed to be threatened as a result of habitat loss and fragmentation. It is generally expected that species in habitats with low temporal variability in carrying capacity have lower degree of dispersal in comparison to those in more ephemeral habitats. As hollow trees are long-lived, species in that habitat are expected to be sensitive to habitat fragmentation, due to a low capacity to establish new populations far from present ones. Using radio telemetry, we studied the dispersal for a beetle, Osmoderma eremita, living in hollow trees. O. eremita exhibited philopatry and only dispersed over short ranges. About 82-88% of the adults remained in the tree where they were caught. All observed dispersal movements ended up in nearby hollow trees and 62% in the neighbouring hollow tree. These results corroborate the suggestion that habitat fragmentation may be detrimental to insects living in temporally stable but spatially variable habitats. In order to preserve such species, we propose that conservation efforts should be focused on maintaining or increasing the number of suitable trees in and near presently occupied stands.Keywords
dispersal distance; dispersal rate; Osmoderma eremita; radio transmitters; sedentary; tree hollowPublished in
Biodiversity and Conservation2008, volume: 17, number: 3, pages: 675-684
Publisher: SPRINGER
Authors' information
Hedin, Jonas
Lund University
Swedish University of Agricultural Sciences, Department of Ecology
Nilsson, Sven G.
Lund University
Smith, Henrik G.
Lund University
UKÄ Subject classification
Forest Science
Environmental Sciences related to Agriculture and Land-use
Publication Identifiers
DOI: https://doi.org/10.1007/s10531-007-9299-7
URI (permanent link to this page)
https://res.slu.se/id/publ/18467