Download the full-sized PDF
Permanent link (DOI): https://doi.org/10.7939/R3Z60C35X
This file is in the following communities:
|Renewable Resources, Department of|
This file is in the following collections:
|Journal Articles (Renewable Resources)|
The local-regional relationship: immigration, extinction, and scale Open Access
- Author or creator
- Additional contributors
- Type of item
- Journal Article (Published)
While local processes (e.g., competition, predation, and disturbance) presumably cause species exclusion and thus limit diversity in individual communities, regional processes (e.g., historical events, immigration, and speciation) are assumed to provide a source of species to colonize and thus enrich local communities. Ecologists have attempted to distinguish between these two sets of processes using graphical evidence for local assemblage saturation. However, such efforts have been controversial and are antithetical to the fact that local diversity bears an imprint of both. We examine the local-regional species richness relationship from the perspective of the theory of island biogeography and develop a model that can produce the full range of observed local-regional richness relationships from linear to curvilinear. Importantly, unlike previous models, we do not require species interactions to produce the curvilinear pattern. Curvilinear relationships arise if per-species stochastic extinction rates are substantially higher than colonization rates, while linear relationships result if colonization rates are higher than extinction rates. Because we also show that merely changing the sampling scale can make local-regional relationships appear either saturated or unsaturated, an inference of ecological processes, derived solely from local-regional relationships, is unwarranted.
- Date created
- License information
- © 2005 Ecological Society of America. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
- Citation for previous publication
He, F., Gaston, K.J., Connor, E.F. and Srivastava, D. (2005). The local-regional relationship: immigration, extinction, and scale. Ecology, 86(2), 360-365. DOI: 10.1890/04-1449.
- Link to related item
- Date Uploaded
- Date Modified
- Audit Status
- Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 95482
Last modified: 2015:10:12 16:22:04-06:00
Original checksum: ecc8ddc0d3e98bb3239dc096fdfcb5ba
Well formed: true
Status message: Improperly formed date offset=94423
File title: ecol_86_310.360_365.tp
File author: mwoodard
Page count: 6