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


Pellet, Jérôme; Schmidt, Benedikt R; et al (2006). Density, climate and varying return points: an analysis of long-term population fluctuations in the threatened European tree frog. Oecologia, 149(1):65-71.

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.

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Scopus Subject Areas:Life Sciences > Ecology, Evolution, Behavior and Systematics
Uncontrolled Keywords:ecology, amphibian, time series, population dynamics, density dependence
Language:English
Date:1 August 2006
Deposited On:11 Oct 2020 10:13
Last Modified:12 Oct 2020 20:00
Publisher:Springer
ISSN:0029-8549
OA Status:Closed
Publisher DOI:https://doi.org/10.1007/s00442-006-0432-1
Official URL:https://www.jstor.org/stable/20445971?seq=1

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