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Controlled experiments of habitat fragmentation: a simple computer simulation and a test using small mammals
Michael A Bowers1, Stephen F Matter1, James L Dooley1
1Department of Environmental Sciences and Blandy Experimental Farm, University of Virginia, P.O. Box 175, 22620, Boyce, VA, USA.
Oecologia
|March 18, 2017
Summary
Habitat fragmentation impacts wildlife populations by reducing available area and creating edges. Edge effects disproportionately affect smaller fragments and species with larger home ranges, necessitating large-scale studies.
Area of Science:
- Ecology
- Conservation Biology
- Landscape Ecology
Background:
- Habitat fragmentation reduces effective population area and introduces edges.
- Previous studies primarily focused on area effects, neglecting edge effects.
- Understanding edge effects requires comparing fragmented and unfragmented landscapes.
Purpose of the Study:
- To investigate the impact of habitat edges on population abundance.
- To develop a simulation model predicting population responses to fragmentation.
- To compare model predictions with empirical data from a field experiment.
Main Methods:
- Developed a computer simulation model of animal home ranges affected by habitat edges.
- Modeled populations in continuous and fragmented landscapes.
- Conducted a field experiment with Peromyscus and Microtus populations.
Main Results:
- Simulation results showed edge effects alter population abundance in fragmented landscapes.
- Edge effects were more pronounced in smaller fragments and for species with larger home ranges.
- Field experiment results generally supported the model's predictions.
Conclusions:
- Habitat edges significantly influence population dynamics, independent of area.
- Large-scale, controlled studies comparing fragmented and unfragmented landscapes are crucial.
- Edge effects are a critical consideration in habitat fragmentation research.
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