Abstract
A critical step to design wildlife mitigating measures is the identification of roadkill hotspots. However, the effectiveness of mitigations based on roadkill hotspots depends on whether spatial aggregations are recurrent over time, spatially restricted, and most importantly, shared by species with diverse ecological and functional characteristics. We used a functional group approach to map roadkill hotspots for mammalian species along the BR-101/North RJ, a major road crossing important remnants of the Brazilian Atlantic Forest. We tested if functional groups present distinct hotspot patterns, and if they converge into the same road sectors, in that case, favoring optimal mitigating actions. Roadkill rates were monitored and recorded between October/2014 and September/2018 and species were classified into six functional groups based on their home range, body size, locomotion mode, diet, and forest-dependency. Hotspots along the roads were mapped for comparison of spatial patterns between functional groups. Results demonstrated that the roadkill index varied idiosyncratically for each functional group throughout the months and that no group presented seasonality. Seven hotspots were shared by two or more functional groups, highlighting the importance of these road stretches to regional mammal fauna. Two of the stretches are associated with aquatic areas extending from one side of the road to the other, and the remaining are connected to patches of native vegetation on both sides. This work brings a promising approach, yet hardly used in ecological studies on roads to analyze roadkill dynamics, assigning more importance to ecological instead of taxonomical characteristics, normally used to identify spatiotemporal patterns.
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HS and PG wrote the main manuscript text + revision the second version. LF prepared figures. VO formatting manuscript for submission + revision the second version. WB contributed to the statistical analyzes. All authors reviewed the manuscript before submission.
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Secco, H., Farina, L.F., da Costa, V.O. et al. Identifying Roadkill Hotspots for Mammals in the Brazilian Atlantic Forest using a Functional Group Approach. Environmental Management 73, 365–377 (2024). https://doi.org/10.1007/s00267-023-01844-7
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DOI: https://doi.org/10.1007/s00267-023-01844-7