Habitat-quality effects on metapopulation dynamics in greater white-toothed shrews, Crocidura russula.

Details

Ressource 1Download: BIB_8051829F9191.P001.pdf (348.12 [Ko])
State: Public
Version: author
Serval ID
serval:BIB_8051829F9191
Type
Article: article from journal or magazin.
Collection
Publications
Title
Habitat-quality effects on metapopulation dynamics in greater white-toothed shrews, Crocidura russula.
Journal
Ecology
Author(s)
Jaquiéry J., Guélat J., Broquet T., Berset-Brändli L., Pellegrini E., Moresi R., Hirzel A.H., Perrin N.
ISSN
0012-9658 (Print)
ISSN-L
0012-9658
Publication state
Published
Issued date
2008
Peer-reviewed
Oui
Volume
89
Number
10
Pages
2777-2785
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
The effects of patch size and isolation on metapopulation dynamics have received wide empirical support and theoretical formalization. By contrast, the effects of patch quality seem largely underinvestigated, partly due to technical difficulties in properly assessing quality. Here we combine habitat-quality modeling with four years of demographic monitoring in a metapopulation of greater white-toothed shrews (Crocidura russula) to investigate the role of patch quality on metapopulation processes. Together, local patch quality and connectivity significantly enhanced local population sizes and occupancy rates (R2 = 14% and 19%, respectively). Accounting for the quality of patches connected to the focal one and acting as potential sources improved slightly the model explanatory power for local population sizes, pointing to significant source-sink dynamics. Local habitat quality, in interaction with connectivity, also increased colonization rate (R2 = 28%), suggesting the ability of immigrants to target high-quality patches. Overall, patterns were best explained when assuming a mean dispersal distance of 800 m, a realistic value for the species under study. Our results thus provide evidence that patch quality, in interaction with connectivity, may affect major demographic processes.
Keywords
Animals, Demography, Ecosystem, Environment, Factor Analysis, Statistical, Female, Male, Models, Biological, Population Density, Population Dynamics, Population Surveillance/methods, Shrews/growth & development, Shrews/physiology
Pubmed
Web of science
Create date
07/02/2008 9:35
Last modification date
20/08/2019 15:40
Usage data