The Importance of Distance-Dependent Synchrony of Coloured Noise
(English)Manuscript (preprint) (Other academic)
Local populations in patches close to each other would probably be influenced by similar environmental conditions. When increasing the distance between the patches the local population will experience less synchronized environments. Since, the degree of synchrony is important for the overall extinction risk it is probably likewise important to include distance dependence in environmental variation when studying environmental forcing on spatially subdivided populations. Thus, we will investigate the importance of including such distance dependent synchrony when studying coloured environmental variation applied to populations in explicit landscapes. We will introduce a method based on controlling the phases when generating 1/fnoise. The results showed large differences between fast or slow density regulation responses in populations. Extinction risk was several magnitudes larger when including distance dependent synchrony compared to randomly distributing environmental time series for overcompensatory dynamics. There was one exception; it is not necessary to include distance dependent synchrony for landscape with random patch distribution. For undercompensatory dynamics the effect from distant dependent synchrony was only apparent in the most aggregated patch configurations.
Synchrony; distance dependence; landscape; patch configuration; noise colour; extinction risk; environmental noise; metapopulation
IdentifiersURN: urn:nbn:se:liu:diva-72946OAI: oai:DiVA.org:liu-72946DiVA: diva2:464026