We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Biological filtering of correlated environments: towards a generalised Moran theorem.
- Authors
Ripa, Jörgen; Ranta, Esa
- Abstract
Many species from diverse taxa are known to display synchronous fluctuations across vast geographical ranges. It is often thought that climate factors influencing the growth of conspecific populations are correlated over large distances and hence produce the synchronous population dynamics – an effect known as the Moran effect. However, for species embedded in a food web the Moran effect needs not necessarily influence the focal species directly, but can act indirectly through other species. Such an indirect synchronization can also occur in an age-structured population, where the correlated environment of one age-class causes synchronous fluctuations of another. Here, we investigate this indirect Moran effect. We find first of all that synchrony is readily transferred through food webs or between age classes, which complicates the identification of the underlying synchronizing factor. Secondly, we find puzzling cases, where synchrony is enhanced as it is filtered through a food web or between age-classes. Our results also apply to systems of different species, but with closely matching dynamics.
- Subjects
FOOD chains; BIOLOGICAL productivity; ANIMAL feeding behavior; ENVIRONMENTAL management; POPULATION dynamics; POPULATION biology; ANIMAL populations; ANIMAL ecology; ECOLOGY
- Publication
Oikos, 2007, Vol 116, Issue 5, p783
- ISSN
0030-1299
- Publication type
Article
- DOI
10.1111/j.0030-1299.2007.15497.x