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Dispersal among habitats varying in fitness: reciprocating migration through ideal habitat selection

Morris, D W; Diffendorfer, J E and Lundberg, Per LU (2004) In Oikos 107(3). p.559-575
Abstract
Current evolutionary models of dispersal set the ends of a continuum where the number of individuals emigrating from a habitat either equals the number of individuals immigrating (balanced dispersal) or where emigrants flow from a source habitat to a corresponding sink. Theories of habitat selection suggest a more sophisticated conditional strategy where individuals disperse from habitats where they have the greatest impact on fitness to habitats where their per capita impact is lower. Asymmetries between periods of population growth and decline result in a reciprocating dispersal strategy where the direction of migration is reversed as populations wax and wane. Thus, for example, if net migration of individuals flows from high- to... (More)
Current evolutionary models of dispersal set the ends of a continuum where the number of individuals emigrating from a habitat either equals the number of individuals immigrating (balanced dispersal) or where emigrants flow from a source habitat to a corresponding sink. Theories of habitat selection suggest a more sophisticated conditional strategy where individuals disperse from habitats where they have the greatest impact on fitness to habitats where their per capita impact is lower. Asymmetries between periods of population growth and decline result in a reciprocating dispersal strategy where the direction of migration is reversed as populations wax and wane. Thus, for example, if net migration of individuals flows from high- to low-density habitats during periods of population growth, net migration will flow in the opposite direction during population decline. Stochastic simulations and analytical models of reciprocating dispersal demonstrate that fitness, carrying capacity, stochastic dynamics, and interference from dominants interact to determine whether dispersal is balanced between habitats, or whether one habitat or the other acts as a net donor of dispersing individuals. While the pattern of dispersal may vary, each is consistent with an underlying strategy of density-dependent habitat selection. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
107
issue
3
pages
559 - 575
publisher
Wiley-Blackwell
external identifiers
  • wos:000225266600012
  • scopus:8744256531
ISSN
1600-0706
DOI
10.1111/j.0030-1299.2004.12894.x
language
English
LU publication?
yes
id
0979af6b-bb10-452d-87f6-e2c726269e0f (old id 135380)
date added to LUP
2007-07-03 14:03:30
date last changed
2017-08-06 03:46:41
@article{0979af6b-bb10-452d-87f6-e2c726269e0f,
  abstract     = {Current evolutionary models of dispersal set the ends of a continuum where the number of individuals emigrating from a habitat either equals the number of individuals immigrating (balanced dispersal) or where emigrants flow from a source habitat to a corresponding sink. Theories of habitat selection suggest a more sophisticated conditional strategy where individuals disperse from habitats where they have the greatest impact on fitness to habitats where their per capita impact is lower. Asymmetries between periods of population growth and decline result in a reciprocating dispersal strategy where the direction of migration is reversed as populations wax and wane. Thus, for example, if net migration of individuals flows from high- to low-density habitats during periods of population growth, net migration will flow in the opposite direction during population decline. Stochastic simulations and analytical models of reciprocating dispersal demonstrate that fitness, carrying capacity, stochastic dynamics, and interference from dominants interact to determine whether dispersal is balanced between habitats, or whether one habitat or the other acts as a net donor of dispersing individuals. While the pattern of dispersal may vary, each is consistent with an underlying strategy of density-dependent habitat selection.},
  author       = {Morris, D W and Diffendorfer, J E and Lundberg, Per},
  issn         = {1600-0706},
  language     = {eng},
  number       = {3},
  pages        = {559--575},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {Dispersal among habitats varying in fitness: reciprocating migration through ideal habitat selection},
  url          = {http://dx.doi.org/10.1111/j.0030-1299.2004.12894.x},
  volume       = {107},
  year         = {2004},
}