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The movement ecology and dynamics of plant communities in fragmented landscapes.


ABSTRACT: A conceptual model of movement ecology has recently been advanced to explain all movement by considering the interaction of four elements: internal state, motion capacity, navigation capacities, and external factors. We modified this framework to generate predictions for species richness dynamics of fragmented plant communities and tested them in experimental landscapes across a 7-year time series. We found that two external factors, dispersal vectors and habitat features, affected species colonization and recolonization in habitat fragments and their effects varied and depended on motion capacity. Bird-dispersed species richness showed connectivity effects that reached an asymptote over time, but no edge effects, whereas wind-dispersed species richness showed steadily accumulating edge and connectivity effects, with no indication of an asymptote. Unassisted species also showed increasing differences caused by connectivity over time, whereas edges had no effect. Our limited use of proxies for movement ecology (e.g., dispersal mode as a proxy for motion capacity) resulted in moderate predictive power for communities and, in some cases, highlighted the importance of a more complete understanding of movement ecology for predicting how landscape conservation actions affect plant community dynamics.

SUBMITTER: Damschen EI 

PROVIDER: S-EPMC2614718 | biostudies-literature | 2008 Dec

REPOSITORIES: biostudies-literature

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The movement ecology and dynamics of plant communities in fragmented landscapes.

Damschen Ellen I EI   Brudvig Lars A LA   Haddad Nick M NM   Levey Douglas J DJ   Orrock John L JL   Tewksbury Joshua J JJ  

Proceedings of the National Academy of Sciences of the United States of America 20081205 49


A conceptual model of movement ecology has recently been advanced to explain all movement by considering the interaction of four elements: internal state, motion capacity, navigation capacities, and external factors. We modified this framework to generate predictions for species richness dynamics of fragmented plant communities and tested them in experimental landscapes across a 7-year time series. We found that two external factors, dispersal vectors and habitat features, affected species colon  ...[more]

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