Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.tpb.2005.03.001
Titel (primär) Extinction risk, coloured noise and the scaling of variance
Autor Wichmann, M.C.; Johst, K.; Schwager, M.; Blasius, B.; Jeltsch, F.
Quelle Theoretical Population Biology
Erscheinungsjahr 2005
Department OESA
Band/Volume 68
Heft 1
Seite von 29
Seite bis 40
Sprache englisch
Abstract

The impact of temporally correlated fluctuating environments (coloured noise) on the extinction risk of populations has become a main focus in theoretical population ecology. In this study we particularly focus on the extinction risk in strongly correlated environments. Here, we found that, in contrast to moderate auto-correlation, the extinction risk was highly dependent on the process of noise generation, in particular on the method of variance scaling. Such scaling is commonly applied to avoid variance-driven biases when comparing the extinction risk under white and coloured noise. We show that for strong auto-correlation often-used scaling techniques lead to a high variability in the variances of the resulting time series and thus to deviations in the subsequent extinction risk. Therefore, we present an alternative scaling method that always delivers the target variance, even in the case of strong auto-correlation. In contrast to earlier techniques, our very intuitive method is not bound to auto-regressive processes but can be applied to all types of coloured noises. We strongly recommend our method to generate time series when the target of interest is the effect of noise colour on extinction risk not obscured by any variance effects.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=3900
Wichmann, M.C., Johst, K., Schwager, M., Blasius, B., Jeltsch, F. (2005):
Extinction risk, coloured noise and the scaling of variance
Theor. Popul. Biol. 68 (1), 29 - 40 10.1016/j.tpb.2005.03.001