Wild vertebrate roadkill in the Chapada dos Veadeiros National Park, Central Brazil

Braz, Vívian da Silva; França, Frederico Gustavo Rodrigues

doi:10.1590/1676-0611-bn-2014-0182

Cited by 31 publications

(29 citation statements)

References 41 publications

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“…In Europe, USA and Canada some studies tried to understand this (CLEVENGER et al, 2003;GRILO et al, 2009;GRILO et al, 2012;D'AMICO et al, 2015;GARRIGA et al, 2017) and concluded that temperature influences roadkill (D'AMICO et al, 2015;GARRIGA et al, 2017). In Brazil, we have just started, our researches investigate if there are more roadkill in the rainy or dry season (BUENO; ALMEIDA, 2010;RAMOS et al, 2011;BRAZ;FRANÇA, 2016) or the stretches of the highway with higher roadkill rates (CÁCERES et al, 2012;BUENO et al, 2012;SANTANA, 2012;FERREIRA et al, 2014;CARVALHO et al, 2015;ASCENSÃO et al, 2017;SANTOS et al, 2017). We still need to understand better the influence of climate variables on roadkill in tropical countries, such as Brazil.…”

Section: Introductionmentioning

confidence: 99%

“…These authors believe that there is an increase in roadkill accidents in the dry season due to lack of resources, which would increase the mobility of animals and, consequently, the roadkill rates on highways. On the other hand, some authors have found no difference on vertebrate roadkill rates between seasons (MILLI; PASSAMANI, 2006;HENGEMÜHLE;CADEMARTORI 2008;CUNHA et al, 2010) or a higher roadkill rate in the wet season (BRAZ;FRANÇA, 2016). Still, the majority of the studies investigate the vertebrates as a group or examine mammals alone.…”

Section: Introductionmentioning

confidence: 99%

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Influence of climate variables on roadkill rates of wild vertebrates in the cerrado biome, Brazil

Carvalho-Roel¹,

Custódio²,

Júnior³

2017

Biosci. J.

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ABSTRACT:Wildlife road killing is a problem for animal conservation in the world. In order to mitigate this problem, it is necessary to understand the factors that affect it, like seasonality and climatic variables. The objective of the study was to evaluate the influence of climatic variables (mean temperature, relative air humidity and accumulated precipitation), seasonality and average daily traffic (ADT) on vertebrate roadkill rates in an area of Cerrado biome, Brazil. The study area is a stretch of 96 km of the highway BR-050, a four-lane road, between the cities of Uberlândia and Uberaba, state of Minas Gerais, Brazil. This area is characterized by intense fragmentation of natural areas, with few remnants of Cerrado biome. The climate has two very defined seasons, a warm and rainy summer and a very dry winter. We analyzed data from roadkill monitoring carried out from April 2012 to March 2013. The road was monitored weekly by car at an average speed of 60 km/h, by two observers, totaling 8,064 km surveyed. The highest roadkill rates for reptiles were recorded in the rainy season, for the other groups (mammals and birds) no difference was found. We also checked seasonality for the most abundant species: the highest number of roadkills was found in the rainy season for the common boa (Boa constrictor amarali) and for the six-banded armadillo (Euphractus sexcinctus). For the crab-eating fox (Cerdocyon thous), crab-eating raccoon (Procyon cancrivorus), striped hog-nosed skunk (Conepatus semistriatus) and red-legged seriema (Cariama cristata) we found no difference. The humidity and accumulated precipitation positively influenced the reptile roadkill rate. As expected, the same result was found for Boa constrictor amarali. Mammal roadkill rate increases with accumulated precipitation, on the other hand, Euphractus sexcinctus roadkill rate increases with temperature. Birds are not affected by climate variables, nevertheless, Cariama cristata roadkill rate decreases as humidity increases. Contrary to expectations, ADT had no influence on roadkill rates. These results show that it is necessary to investigate the influence of possible descriptor variables on mammals, birds and reptiles separately and not for all vertebrates as a group. Furthermore, certain species may even present different temporal patterns.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of climate variables on roadkill rates of wild vertebrates in the cerrado biome, Brazil

Carvalho-Roel¹,

Custódio²,

Júnior³

2017

Biosci. J.

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“…Amphibians are one of the most underestimated taxa in road kill surveys (Teixeira et al, 2013, Braz & França, 2016. In the present survey, it was possible to identify only one individual of Rhinella sp., due to its outstanding size.…”

Section: Resultsmentioning

confidence: 74%

“…In the present survey, it was possible to identify only one individual of Rhinella sp., due to its outstanding size. Accordingly, to Corrêa et al (2013), other species of smaller amphibians occur in the region and most likely, the number of road killed frogs was probably once again underestimated (Teixeira et al, 2013, Braz & França, 2016.…”

Section: Resultsmentioning

confidence: 89%

“…Further studies should identify which stretches present a higher abundance of road kill records, correlating this data with landscape characteristics, cycles of the moon, temperature, car movement patterns (Carvalho et al, 2014) and rainfall rates (Braz & França, 2016). An approach involving landscape ecology and the Geographic Information System could help to explain and identify vulnerable areas in terms of collisions.…”

Section: Resultsmentioning

confidence: 99%

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<b>Vertebrate road kill survey on a highway in southern Brazil

Corrêa

Silva

Oliveira

et al. 2017

Acta Sci. Biol. Sci.

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ABSTRACT. Highways are a major factor acting in the decline of several wildlife populations. Impact occurs due to the continuous flow of motor vehicles over tracks and collision with animals using the same area. This study aimed to list road killed wild vertebrates found in highways in the Pampa Biome, state of Rio Grande do Sul, over an entire year. The taxa found (amphibians, reptiles, birds and mammals) were identified to species level and their frequency of occurrence was seasonally registered. Along 2,160 km, we found 318 road killed individuals, totaling 65 species. This number represents an average of 0.147 road killed specimens by kilometer (that is, 1 individual each 7 km). Of these, seven species are under threat of extinction in the state of Rio Grande do Sul. We also found a seasonal pattern among road kills, in which the highest number of road killed animals was registered in the summer and spring months. These results contribute to increase knowledge about which species are most impacted by road kill on highways of the Pampa Biome. Such data can be used as an indicator for the implementation of measures by competent bodies to mitigate impacts of highways in the state of Rio Grande do Sul.Keywords: mortality, wildlife, Rio Grande do Sul.Levantamento de vertebrados atropelados em rodovias do sul do Brasil RESUMO. As rodovias são um fator provocador de declínio populacional de diversas espécies da fauna silvestre. O impacto ocorre devido ao contínuo fluxo de veículos automotores sobre as pistas e a colisão dos mesmos com animais que também utilizam essa área. O presente estudo teve por finalidade listar os vertebrados silvestres encontrados atropelados em rodovias no bioma Pampa, no Estado do Rio Grande do Sul, ao longo de um ano. Os táxons encontrados (anfíbios, répteis, aves e mamíferos) foram identificados em nível específico e a sua frequência de ocorrência foi registrada de forma sazonal. Em 2.160 km de estrada percorridos, foram encontrados 318 indivíduos atropelados, totalizando 65 espécies. Essa quantia representa uma média de 0,147 espécimes atropelados por quilômetro (ou seja, 01 indivíduo atropelado a cada 07 Km). Destas, sete espécies estão sob ameaça de extinção no Estado do Rio Grande do Sul. Foram observados padrões sazonais nos atropelamentos, sendo que os meses de verão e da primavera apresentaram o maior número de animais atropelados. Os resultados do estudo contribuem para o conhecimento de quais espécies da fauna silvestre são mais impactadas por atropelamentos no bioma Pampa. Estes dados poderão ser utilizados como orientação na implantação de medidas por órgãos competentes, afim de mitigar o impacto de rodovias no Estado do Rio Grande do Sul.Palavras-chave: mortandade, fauna silvestre, Rio Grande do Sul.

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Landscape and road features linked to wildlife mortality in the Amazon

Medrano-Vizcaíno,

Grilo,

Brito-Zapata

et al. 2023

Biodivers Conserv

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Roads impact wildlife around the world; however, dedicated studies are lacking in many biodiverse areas such as the Amazon. Identifying which species are more often hit by vehicles and which landscape and road-related features promote roadkill is essential to guide future development and ensure adequate mitigation actions. For six months, we monitored 240 km of roads in the Ecuadorian Amazon and recorded 1125 dead vertebrates (149 species). Reptiles were the most observed Class with 380 individuals (56 species), followed by amphibians with 278 individuals (11 species), birds with 259 individuals (62 species), and mammals with 208 individuals (20 species). We used Random Forest models to explore the role of various land cover types and road sinuosity on the observed mortality. Additionally, we created heatmaps to visualize the road segments where roadkills were more frequent. For all vertebrates, mortality was more likely in straight road sections near rivers. The effects of other variables were taxa-specific. Amphibian mortality was more likely near bare soil or forest, birds and mammals died more often near herbaceous-shrubby vegetation, and reptile mortality occurred more often in areas with high cover of agriculture. Road segments with high mortality (i.e., roadkill hotspots) varied across taxa. These hotspots identify areas where further research into mitigation is needed to assess road impacts and prevent collisions. Among records, we found rare and threatened species, for which road mortality could be a significant threat. Roadkill surveys not only aid in quantifying threats and informing future planning but can also provide insight into local biodiversity.

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Wild vertebrate roadkill in the Chapada dos Veadeiros National Park, Central Brazil

Cited by 31 publications

References 41 publications

Influence of climate variables on roadkill rates of wild vertebrates in the cerrado biome, Brazil

Influence of climate variables on roadkill rates of wild vertebrates in the cerrado biome, Brazil

<b>Vertebrate road kill survey on a highway in southern Brazil

Landscape and road features linked to wildlife mortality in the Amazon

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