Density, climate and varying return points: an analysis of long-term population fluctuations in the threatened European tree frog.

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It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
Serval ID
serval:BIB_E31562DC3959
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Density, climate and varying return points: an analysis of long-term population fluctuations in the threatened European tree frog.
Journal
Oecologia
Author(s)
Pellet J., Schmidt B.R., Fivaz F., Perrin N., Grossenbacher K.
ISSN
0029-8549 (Print)
ISSN-L
0029-8549
Publication state
Published
Issued date
08/2006
Peer-reviewed
Oui
Volume
149
Number
1
Pages
65-71
Language
english
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Experimental research has identified many putative agents of amphibian decline, yet the population-level consequences of these agents remain unknown, owing to lack of information on compensatory density dependence in natural populations. Here, we investigate the relative importance of intrinsic (density-dependent) and extrinsic (climatic) factors impacting the dynamics of a tree frog (Hyla arborea) population over 22 years. A combination of log-linear density dependence and rainfall (with a 2-year time lag corresponding to development time) explain 75% of the variance in the rate of increase. Such fluctuations around a variable return point might be responsible for the seemingly erratic demography and disequilibrium dynamics of many amphibian populations.
Keywords
Animals, Anura/physiology, Climate, Conservation of Natural Resources/statistics & numerical data, Ecosystem, Longitudinal Studies, Models, Theoretical, Population Density, Population Dynamics, Switzerland
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 18:54
Last modification date
01/10/2019 7:19
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