Effects of habitat fragmentation on effective dispersal of Florida scrub-jays
Abstract
Studies comparing dispersal in fragmented versus unfragmented landscapes show that habitat fragmentation alters the dispersal behavior of many species. We used two complementary approaches to explore Florida Scrub-Jay (Aphelocoma coerulescens) dispersal in relation to landscape fragmentation. First, we compared dispersal distances of color-marked individuals in intensively monitored continuous and fragmented landscapes. Second, we estimated effective dispersal relative to the degree of fragmentation (as inferred from two landscape indexes: proportion of study site covered with Florida Scrub-Jay habitat and mean distance to nearest habitat patch within each study site) by comparing genetic isolation-by-distance regressions among 13 study sites having a range of landscape structures. Among color-banded individuals, dispersal distances were greater in fragmented versus continuous landscapes, a result consistent with other studies. Nevertheless, genetic analyses revealed that effective dispersal decreases as the proportion of habitat in the landscape decreases. These results suggest that although individual Florida Scrub-Jays may disperse farther as fragmentation increases, those that do so are less successful as breeders than those that disperse short distances. Our study highlights the importance of combining observational data with genetic inferences when evaluating the complex biological and life-history implications of dispersal.
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Augmented dispersal may not always translate into the establishment of stable local populations because some species may be unable to survive and successfully reproduce.
“Augmented dispersal may not always translate into the establishment of stable local populations because some species may be unable to survive and successfully reproduce (Coulon et al., 2010).”
From A meta-analysis of environmental responses to freshwater ecosystem restoration in China (1987–2018) (2023) · cites this paper as Coulon et al., 2010
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A meta-analysis of environmental responses to freshwater ecosystem restoration in China (1987–2018)
Fu, H., Xu, J., Zhang, H., García Molinos, J., Zhang, M., Klaar, M., & Brown, L. E. (2023) · Environmental Pollution · doi:10.1016/j.envpol.2022.120589 · Cited by 15 · see citing works
- Authors
- COULON, A., FITZPATRICK, J. W., BOWMAN, R., & LOVETTE, I. J.
- Affiliations
- Cornell University (US)
- Archbold Biological Station (US)
- Corresponding author
- COULON, AURÉLIE
- Venue
- Conservation Biology
- Publisher
- Wiley
- Published
- 2010-07-15
- Volume
- 24
- Issue
- 4
- Pages
- 1080-1088
- ISSN
- 0888-8892 (ISSN-L)
- 1523-1739
- OpenAlex
- W1598649379
- Semantic Scholar
- e163f6c983a752b4d2beb9ad641b3fab18c90ea3
- Cited by
- 93
- References
- 41
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 5 · 2023: 3 · 2022: 5 · 2021: 9 · 2020: 6 · 2019: 3 · 2018: 4 · 2017: 9 · 2016: 2 · 2015: 9 · 2014: 2 · 2013: 6 · 2012: 12
- FWCI
- 8.13
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Conservation Biology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Science Foundation
- U.S. Fish and Wildlife Service
- Topics
- Physical Sciences › Environmental Science › Ecology › Avian ecology and behavior
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
- Physical Sciences › Environmental Science › Ecology › Wildlife-Road Interactions and Conservation
- Keywords
- habitat fragmentation, Florida scrub-jay, Aphelocoma coerulescens, dispersal distance, color marking, genetic isolation by distance, landscape structure, breeding success, life history
- MeSH terms
- Animals, Demography, Florida, Genetics, Population, Geography, Linear Models, Ecosystem, Songbirds, Gene Flow
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