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Adaptive branching in source-sink habitats

Holmér, Jennie LU and Ripa, Jörgen LU (2010) In Evolutionary Ecology 24(2). p.479-489
Abstract
Evolution and ecological diversification in a heterogeneous environment is driven by an often complex interplay between local adaptation and dispersal between different habitat types. Heterogeneous environments also easily generate source-sink dynamics of populations coupled by dispersal. It follows that local adaptation and possible adaptive radiation almost by necessity involves adaptation to a (pseudo-)sink habitat, which is considered unlikely. We here study a model of 'parapatric branching' with this special focus on the spatial ecology of the process. We find that evolutionary branching can display a sequence of alternating adaptations to the source or the sink. In some circumstances a true sink can become a pseudo-sink through... (More)
Evolution and ecological diversification in a heterogeneous environment is driven by an often complex interplay between local adaptation and dispersal between different habitat types. Heterogeneous environments also easily generate source-sink dynamics of populations coupled by dispersal. It follows that local adaptation and possible adaptive radiation almost by necessity involves adaptation to a (pseudo-)sink habitat, which is considered unlikely. We here study a model of 'parapatric branching' with this special focus on the spatial ecology of the process. We find that evolutionary branching can display a sequence of alternating adaptations to the source or the sink. In some circumstances a true sink can become a pseudo-sink through adaptation to the corresponding source habitat. The evolutionary endpoint is a spatially structured community consisting of two source populations with one corresponding sink or pseudo-sink each. Our results shed new light on the interpretation of extant source-sink systems and the process of parapatric branching. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Parapatric branching, Source-sink dynamics, Local adaptation, Dispersal, Migration
in
Evolutionary Ecology
volume
24
issue
2
pages
479 - 489
publisher
Springer
external identifiers
  • wos:000274109600015
  • scopus:77952746049
ISSN
1573-8477
DOI
10.1007/s10682-009-9320-6
language
English
LU publication?
yes
id
8c6b01b6-d88b-4d2a-b566-f85fbddc6475 (old id 1570804)
date added to LUP
2010-03-16 15:30:23
date last changed
2018-05-29 09:21:11
@article{8c6b01b6-d88b-4d2a-b566-f85fbddc6475,
  abstract     = {Evolution and ecological diversification in a heterogeneous environment is driven by an often complex interplay between local adaptation and dispersal between different habitat types. Heterogeneous environments also easily generate source-sink dynamics of populations coupled by dispersal. It follows that local adaptation and possible adaptive radiation almost by necessity involves adaptation to a (pseudo-)sink habitat, which is considered unlikely. We here study a model of 'parapatric branching' with this special focus on the spatial ecology of the process. We find that evolutionary branching can display a sequence of alternating adaptations to the source or the sink. In some circumstances a true sink can become a pseudo-sink through adaptation to the corresponding source habitat. The evolutionary endpoint is a spatially structured community consisting of two source populations with one corresponding sink or pseudo-sink each. Our results shed new light on the interpretation of extant source-sink systems and the process of parapatric branching.},
  author       = {Holmér, Jennie and Ripa, Jörgen},
  issn         = {1573-8477},
  keyword      = {Parapatric branching,Source-sink dynamics,Local adaptation,Dispersal,Migration},
  language     = {eng},
  number       = {2},
  pages        = {479--489},
  publisher    = {Springer},
  series       = {Evolutionary Ecology},
  title        = {Adaptive branching in source-sink habitats},
  url          = {http://dx.doi.org/10.1007/s10682-009-9320-6},
  volume       = {24},
  year         = {2010},
}