Publication Details |
Category | Text Publication |
Reference Category | Book chapters |
Title (Primary) | Extinctions in habitat remnants: lessons from a specialized gecko species |
Title (Secondary) | Jahrestagung 1995, Dresden/Tharandt |
Author | Wiegand, K.; Brandl, R.; Henle, K.; Sarre, S.; Stephan, T.; Wissel, C. |
Publisher | Pfadenhauer, J.; Kappen, L.; Mahn, E.G.; Otte, A.; Plachter, H. |
Source Titel | Verhandlungen der Gesellschaft für Ökologie |
Year | 1996 |
Department | OESA; NSF |
Volume | 26 |
Page From | 489 |
Page To | 494 |
Language | englisch |
Keywords | Fragmentation, extinction, population dynamics, risk analysis, nature conservation, simulation model |
Abstract | The Western Australian wheatbelt is an area that has been rapidly developed for agriculture about 70 years ago. Most of the native forests were cleared and species adapted to this vegetation are now restricted to small isolated remnants. One example is the reti· culated velvet gecko Oedura reticulata. We explore the hypothesis that actual presence-absence patterns of this species across forest remnants are the results of stochastic extinctions of local populations in small remnants. For this purpose, we constructed an individuals- based model to estimate extinction risks of isolated gecko populations. Our results show that within the given time scale, O. reticulata may survive even in very small forest remnants and we have to reject the hypothesis of stochastic extinctions as the main factor influencing the biogeographic pattern. From a discussion of the implicit assumptions of our model, we pinpoint further factors influencing the actual distribution of species in the Western Australian wheatbelt. |
Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22467 |
Wiegand, K., Brandl, R., Henle, K., Sarre, S., Stephan, T., Wissel, C. (1996): Extinctions in habitat remnants: lessons from a specialized gecko species 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. 489 - 494 |