Perspectives in Ecology and Conservation Perspectives in Ecology and Conservation
Perspectives in Ecology and Conservation 2017;15:56-60 DOI: 10.1016/j.pecon.2017.03.003
Research Letter
Assessing the consistency of hotspot and hot-moment patterns of wildlife road mortality over time
Rodrigo Augusto Lima Santosa,b,c,d,1,, , Fernando Ascensãoe,f,1, Marina Lopes Ribeiroc, Alex Bagerg, Margarida Santos-Reisd, Ludmilla M.S. Aguiara,b
a Curso de Pós-Graduação em Ecologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
b Laboratório de Biologia e Conservação de Morcegos, Departamento de Zoologia, Universidade de Brasília, Brasília, DF, Brazil
c Instituto Brasília Ambiental (IBRAM), Brasília, DF, Brazil
d Centre for Ecology, Evolution and Environmental Changes (Ce3C), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
e Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/InBio), Universidade do Porto, Vairão, Portugal
f Centro de Ecologia Aplicada “Professor Baeta Neves” (CEABN/InBio), Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal
g Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brazil
Received 10 August 2016, Accepted 06 March 2017
Abstract

Spatial and temporal aggregation patterns of wildlife-vehicle collisions are recurrently used to inform where and when mitigation measures are most needed. The aim of this study is to assess if such aggregation patterns remain in the same locations and periods over time and at different spatial and temporal scales. We conducted biweekly surveys (n=484) on 114km of nine roads, searching for road casualties (n=4422). Aggregations were searched using different lengths of road sections (500, 1000, 2000m) and time periods (fortnightly, monthly, bimonthly). Our results showed that hotspots and hot-moments are generally more consistent at larger temporal and spatial scales. We therefore suggest using longer road sections and longer time periods to implement mitigation measures in order to minimize the uncertainty. We support this finding by showing that the proportional costs and benefits to mitigate roadkill aggregations are similar when using different spatial and temporal units.

Keywords
Road segments, Roadkill, Aggregations, Scale effect, Mitigations