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Biological filtering of correlated environments: towards a generalised Moran theorem

Ripa, Jörgen LU and Ranta, E (2007) In Oikos 116(5). p.783-792
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
116
issue
5
pages
783 - 792
publisher
Wiley-Blackwell
external identifiers
  • wos:000245814500008
  • scopus:34247397980
ISSN
1600-0706
DOI
10.1111/j.0030-1299.2007.15497.x
language
English
LU publication?
yes
id
c35ef61e-647d-4aba-97c9-2003704135f7 (old id 168661)
date added to LUP
2007-07-03 15:40:09
date last changed
2017-05-21 03:28:04
@article{c35ef61e-647d-4aba-97c9-2003704135f7,
  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.},
  author       = {Ripa, Jörgen and Ranta, E},
  issn         = {1600-0706},
  language     = {eng},
  number       = {5},
  pages        = {783--792},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {Biological filtering of correlated environments: towards a generalised Moran theorem},
  url          = {http://dx.doi.org/10.1111/j.0030-1299.2007.15497.x},
  volume       = {116},
  year         = {2007},
}