Abstract
Fragmentation of wildlife habitat by road development is a major threat to biodiversity. Hence, conservation and enhancement of habitat connectivity in roaded landscapes are crucial for effectively maintaining long-term persistence of ecological processes, such as gene flow and migration. Using multivariate statistical techniques combined with graph theoretical methods, we investigated the influence of road-crossing habitat connectivity and road-related features on roadkill abundance of forest mammals in protected areas of South Korea. Because species have different dispersal abilities and thus connectivity would differ between them, we explored three different groups of road-killed mammals, categorized as small, intermediate, and large ones. We found that in all three mammal groups, roadkills are increased on roads that intersect high-connectivity routes. Furthermore, the effect of habitat connectivity on roadkill abundance was scale-dependent. The roadkill abundances of small, intermediate, and large mammals were related with connectivity measured at scales ranging between 100 and 300 m, between 5 and 7 km, and between 10 and 25 km, respectively. Our finding with regard to scale-dependency highlights the importance of maintaining movement and connectivity across roads at multiple scales based on the dispersal potential of different species when planning conservation strategies for forest mammalian roadkill mitigation.
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Acknowledgments
This study would not have been possible without the support from many Korean researchers and governmental organizations, particularly the Ministry of Environment. We also thank anonymous reviewers and editors for helpful feedback on the manuscript. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (No. NRF-2011-0024289).
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Communicated by David Hawksworth.
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Kang, W., Minor, E.S., Woo, D. et al. Forest mammal roadkills as related to habitat connectivity in protected areas. Biodivers Conserv 25, 2673–2686 (2016). https://doi.org/10.1007/s10531-016-1194-7
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DOI: https://doi.org/10.1007/s10531-016-1194-7