Effects of roads on the vertebrates diversity of the Indigenous Territory Paresi and its surrounding

Brum, T. R.; Santos-Filho, Manoel dos; Canale, Gustavo Rodrigues; Ignácio, Áurea Regina Alves

doi:10.1590/1519-6984.08116

Cited by 21 publications

(25 citation statements)

References 13 publications

(16 reference statements)

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“…The black line represents the observed number of neighbors per roadkill along the road minus the mean expected number of neighbors if the roadkill was distributed randomly. Values above the upper confidence limit (grey line) indicate significant clustering of roadkill with those observed in other studies (Brum, Santos-Filho, Canale, & Ignácio, 2018;Coelho et al, 2008;Vargas-Salinas, Delgado-Ospina, & López-Aranda, 2011). However, we found that herpetofauna is affected the most whereas in other studies (Coelho et al, 2008;Miranda et al, 2017;Teixeira, Coelho, Esperandio, Rosa Oliveira, et al, 2013) (Sosa & Schalk, 2016).…”

Section: Discussionsupporting

confidence: 74%

“…The higher the intensity (red color) the higher the aggregation of roadkill vertebrates such as frogs and small snakes are therefore more easily missed than mammals, which tend to be larger (D'Anunciação, Lucas, Silva, & Bager, 2013;Santos et al, 2016;Slater, 2002). This could also partially explain the relatively high roadkill per surveyed km in this study compared to estimates by Brum et al (2018) and Payan et al (2013). Finally, the persistence time of carcasses is generally lower for reptiles and amphibians than for mammals (Santos, Carvalho, & Mira, 2011), which may also have led to an underestimation of reptile and amphibian mortality in other Neotropical studies, performed with a longer sampling interval (e.g., a week).…”

Section: Discussionmentioning

confidence: 52%

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Wildlife roadkill patterns in a fragmented landscape of the Western Amazon

Filius

Hoek

Jarrín‐V

et al. 2020

Ecology and Evolution

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One of the most evident and direct effects of roads on wildlife is the death of animals by vehicle collision. Understanding the spatial patterns behind roadkill helps to plan mitigation measures to reduce the impacts of roads on animal populations. However, although roadkill patterns have been extensively studied in temperate zones, the potential impacts of roads on wildlife in the Neotropics have received less attention and are particularly poorly understood in the Western Amazon. Here, we present the results of a study on roadkill in the Amazon region of Ecuador; a region that is affected by a rapidly increasing development of road infrastructure. Over the course of 50 days, in the wet season between September and November 2017, we searched for road‐killed vertebrates on 15.9 km of roads near the city of Tena, Napo province, for a total of 1,590 surveyed kilometers. We recorded 593 dead specimens, predominantly reptiles (237 specimens, 40%) and amphibians (190, 32%), with birds (102, 17%) and mammals (64, 11%) being less common. Recorded species were assigned to three functional groups, based on their movement behavior and habitat use (“slow,” “intermediate,” and “fast”). Using Ripley's K statistical analyses and 2D HotSpot Identification Analysis, we found multiple distinct spatial clusters or hotspots, where roadkill was particularly frequent. Factors that potentially determined these clusters, and the prevalence of roadkill along road segments in general, differed between functional groups, but often included land cover variables such as native forest and waterbodies, and road characteristics such as speed limit (i.e., positive effect on roadkill frequency). Our study, which provides a first summary of species that are commonly found as roadkill in this part of the Amazon region, contributes to a better understanding of the negative impacts of roads on wildlife and is an important first step toward conservation efforts to mitigate these impacts.

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Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 52%

Wildlife roadkill patterns in a fragmented landscape of the Western Amazon

Filius

Hoek

Jarrín‐V

et al. 2020

Ecology and Evolution

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“…However, this animal is very selective in its choice of habitat and is dependent on forest cover and wet areas (Desbiez et al, 2009). The high frequency of roadkill records (Cherem et al, 2007;Cunha et al, 2010;Costa, 2011;Caceres et al, 2012) may be due to its limited sight and hearing as well as its exposure during slow movements between forest fragments intercepted by roadways (Brum et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Although there is no consensus on the effect of seasonality on mammals killed by vehicular traffic (Carvalho et al, 2017), studies demonstrate a correlation between vehicle-related deaths (roadkills) of wild mammals and seasonality (Brum et al, 2017), which is likely associated with dispersal and migration movements related to foraging and reproduction (Braz & França, 2016).…”

Section: Iheringia Iheringiamentioning

confidence: 99%

Roadkilled mammals in the northern Amazon region and comparisons with roadways in other regions of Brazil

Caires

Souza

Lobato

et al. 2019

Iheringia, Sér. Zool.

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Roadways and road traffic modify landscapes, posing a threat to the conservation of species in different biomes. The aim of the present study was to analyze roadkill records of wild mammals and to compare the results to findings from 37 other studies conducted in Brazil, to evaluate the richness and diversity of threatened species in different eco-regions of the country. This study was conducted between June 2007 and June 2008, along 60 km of the inter-state highway BR-364, which connects the municipalities of Ouro Preto d’Oeste and Presidente Médici in the state of Rondônia (northern Brazil). Two hundred twenty roadkills were recorded involving 13 species of mammals. Cingualata, Pilosa and Carnivora were the most represented orders. The most represented were the generalist species Dasypus novemcinctus (56.7%), Tamandua tetradactyla (10.5%), and Cerdocyon thous (8.2%), reflecting the adaptability of these species to habitat changes and presence of humans. The number of roadkilled individuals and species indicated no significant differences between the dry and rainy seasons. The findings indicate a high index of roadkills (3.38 individuals/km/year) and moderate number of run over species (0.20 species/km/year) in the region in comparison to records from other roadways in Brazil, with 46% species having an endangered status. Roadways in the eco-regions of the Cerrado (Brazilian savanna) accounted a significantly larger proportion of endangered species (mean: 52%) in comparison to the Pampa (lowlands of southern Brazil; 24%), but the differences in comparison to roadways in Amazonia (37%) and the Atlantic Forest (31%) were non-significant. The present findings underscore the need for emergency measures to minimize the impact of roadkills on mammals. Moreover, priority should be given to more impacted roadways and more threaten eco-regions.

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“…Both species are common and adapted to living in disturbed environments, they are omnivorous and even eat dead animals on the road, the same being true for Conepatus semistriatus (Reis et al, 2010). The BR-050 highway presented a roadkill rate of 0.03 wild mammals/km/day which is relevant when compared to other researchers performed in a Cerrado region, 0.01 (Cunha, Moreira, & Silva, 2010;Carvalho, Bordignon, & Shapiro, 2014), 0.02 (Braz & França, 2016); 0.03 (Cáceres et al, 2012;Brum et al, 2018). Anyway, roadkill rates are underestimated and a correction index needs to be calculated in order to try to get more actual numbers (Santos, Carvalho, & Mira, 2011;.…”

Section: Discussionmentioning

confidence: 81%

Do roadkill aggregations of wild and domestic mammals overlap?

Carvalho-Roel

Custódio

Júnior

2019

RBT

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Domestic animals are involved in a large number of traffic accidents and they represent danger to humans due to their size. Despite this, few studies consider domestic animals. That is why we evaluate mammals’ roadkill aggregations in order to locate them and to determine if wild and domestic mammals’ roadkills overlap. In addition, we investigate the influence of the landscape on the location of the aggregations. This study was carried out on the BR-050 highway, an area of Cerrado biome, in Southeastern Brazil. The monitoring was executed from April 2012 to March 2013, by car, at an average speed of 60 km/h, with two observers looking for roadkills on the highway. We found 482 mammals’ roadkills, including 260 (54 %) wild mammals, 164 (34 %) domestic and 58 (12.0 %) undetermined specimens. Of the 21 recorded mammal species, five were domestic. The wild mammals’ roadkill rate was 0.03 (± 0.02) individuals/km/day and the domestic roadkill rate was 0.02 (± 0.01). We detected roadkill aggregations for wild and domestic mammals. Roadkill hotspots of domestic mammals and wild mammals did not overlap. The variables that had the highest influence on wild mammals’ roadkill probability were: agriculture and silviculture cover as positive effects and distance to the nearest river, to the urban perimeter and to a natural fragment as negative effects. For domestic mammals these variables were: area of the smallest fragment and distance to a natural fragment as positive effects and silviculture cover as a negative effect. The explanation for the wild and domestic mammals’ roadkill hotspot non overlapping seems to be the effect of each variable in determining the roadkill hotspot since their effect is different for wild and domestic mammals. On the other hand, this non overlapping can be a result of domestic mammals’ scavenging habits. We propose different kinds of mitigation measures in order to reduce domestic and wild mammals’ roadkill.

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Effects of roads on the vertebrates diversity of the Indigenous Territory Paresi and its surrounding

Cited by 21 publications

References 13 publications

Wildlife roadkill patterns in a fragmented landscape of the Western Amazon

Wildlife roadkill patterns in a fragmented landscape of the Western Amazon

Roadkilled mammals in the northern Amazon region and comparisons with roadways in other regions of Brazil

Do roadkill aggregations of wild and domestic mammals overlap?

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