期刊
ECOLOGY
卷 93, 期 4, 页码 704-710出版社
WILEY
DOI: 10.1890/11-1797.1
关键词
habitat fragmentation; landscape corridor; regional enrichment; species diversity
类别
资金
- National Science Foundation [DEB-9907365, DEB-0614333, DEB-0733746]
- Department of Energy, Aiken, South Carolina
- [DE-AI09-00SR22188]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1050591, 1050392, 1050361, 1050929] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1050481] Funding Source: National Science Foundation
Local species diversity is maintained over ecological time by a balance between dispersal and species interactions. Local-regional species richness relationships are often used to investigate the relative importance of these two processes and the scales at which they operate. For communities undergoing succession, theory predicts a temporal progression in local-regional species richness relationships: from no relationship to positive linear to saturating. However, observational tests have been mixed, and experiments have been rare. Using a replicated large-scale experiment, we evaluate the impact of two dispersal-governing processes at the regional scale, connectivity and shape of the region (i.e., patches), on the progression of local-regional species richness relationships for plant communities undergoing succession. Regional connectivity accelerates the transition from no relationship to a positive linear relationship, while the shape of the region has no consistent effect nine years post-disturbance. Our results experimentally demonstrate the importance of dispersal in structuring local-regional species richness relationships over time and suggest that conservation corridors among regions can increase local diversity through regional enrichment of plant communities undergoing reassembly.
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