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Details zur Publikation

Referenztyp Buchkapitel
DOI / URL
Titel (primär) Extinction risk in a stochastic environment: the impact on body size relations
Titel (sekundär) Jahrestagung 1995, Dresden/Tharandt
Autor Johst, K.; Brandl, R.;
Herausgeber Pfadenhauer, J.; Kappen, L.; Mahn, E.G.; Otte, A.; Plachter, H.;
Journal / Serie Verhandlungen der Gesellschaft für Ökologie
Erscheinungsjahr 1996
Department OESA;
Band/Volume 26
Sprache englisch;
Abstract

Using a model we explore how extinction risk of populations in a stochastic environment may depend on body size. We distinguish between environmental fluctuations {weak perturbations) and catastrophes {strong perturbations). Body size is assumed to be correlated to the growth rate and to its variance. Our results show that populations of large-bodied species are more prone to go extinct under the influence of catastrophes, whereas populations of small-bodied species are more vulnerable under the influence of environmental fluctuations. Therefore, very small and very large species should have larger minimum viable population sizes than intermediate species. The consequences of our results for the interspecific distributions of body sizes and the relationships bet· ween body size versus population density and geographical range are discussed.

ID 22464
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22464
Johst, K., Brandl, R. (1996):
Extinction risk in a stochastic environment: the impact on body size relations
In: Pfadenhauer, J., Kappen, L., Mahn, E.G., Otte, A., Plachter, H. (eds.)
Jahrestagung 1995, Dresden/Tharandt
Verhandlungen der Gesellschaft für Ökologie 26
Fischer, Stuttgart, p. 443 - 446