Adaptive branching in source-sink habitats
Författare
Summary, in English
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.
Publiceringsår
2010
Språk
Engelska
Sidor
479-489
Publikation/Tidskrift/Serie
Evolutionary Ecology
Volym
24
Issue
2
Dokumenttyp
Artikel i tidskrift
Förlag
Springer
Ämne
- Biological Sciences
Nyckelord
- Parapatric branching
- Source-sink dynamics
- Local adaptation
- Dispersal
- Migration
Status
Published
Forskningsgrupp
- Theoretical Population Ecology and Evolution Group
ISBN/ISSN/Övrigt
- ISSN: 1573-8477