The effects of a motorway on movement behaviour and gene flow in a forest carnivore: Joint evidence from road mortality, radio tracking and genetics

Carvalho, Filipe; Lourenço, André; Carvalho, Reginaldo de; Alves, Paulo C.; Beja, Pedro

doi:10.1016/j.landurbplan.2018.06.007

Cited by 23 publications

(30 citation statements)

References 74 publications

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“…Moreover, we compared the performance of models using daily movements with models using inferred dispersal, as they correspond to different life-events associated with individual survival and longterm population persistence. Juvenile as well as subadult are the most road-killed age classes for the genet and causalities are higher during the dispersal period (Carvalho et al 2018). Both these facts suggest that dispersal is a critical event explaining temporal patterns of genet roadkills.…”

Section: Discussionmentioning

confidence: 93%

“…However, for H2, all-year-round roadkill records were included, while for H3 roadkill data were restricted to the dispersal period of the genets (September-March; Larivière and Calzada 2001). Because such movements are more common among juveniles or subadults (Fey et al 2016;Carvalho et al 2018), we further excluded all identified road-killed adults (animals with a lower probability of being in dispersal) from H3 testing.…”

Section: Step (B) Model Buildingmentioning

confidence: 99%

“…Moreover, riparian habitats, which had the most pronounced effects for both data type models (Carvalho et al 2016), are often used as corridors during dispersal movements and simultaneously provide optimal residence habitat for multiple mesocarnivores species including genet (Carvalho et al 2016;Grilo et al 2016). On the other hand, adult genets may undertake extraterritorial habitat movements across supposedly avoided roads (Carvalho et al 2018) which might contribute to reducing potential bias effect due to the small number of identified dispersing juveniles in the datasets. Although road avoidance is likely to exclude carnivore road-crossing Fig.…”

Section: Comparison Of Model Performancementioning

confidence: 99%

“…It is also commonly assumed in SDMs that opportunistically collected fine-scale occurrences (used to fit the models) represent mostly daily movement, as dispersal is an infrequent event in the lifetime of one animal (Cosgrove et al 2018). Although dispersal is rare, occurring usually once a year, high kill rates have been detected during this biological period (Červinka et al 2015;Carvalho et al 2018). Crossing roads is inherently risky and roads may impair daily movement routes through avoidance or barrier effects (Coffin 2007;Bissonette and Cramer 2008;Cosgrove et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Crossing roads is inherently risky and roads may impair daily movement routes through avoidance or barrier effects (Coffin 2007;Bissonette and Cramer 2008;Cosgrove et al 2018). However, species may be "forced" to cross roads during natal dispersal to reach new territories (Fey et al 2016;Carvalho et al 2018). Consequently, SDM predictions could be significantly biased when validated through high rates of roadkills containing dispersal movements.…”

Section: Introductionmentioning

confidence: 99%

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Accounting for Connectivity Uncertainties in Predicting Roadkills: a Comparative Approach between Path Selection Functions and Habitat Suitability Models

Valerio

Carvalho

Barbosa

et al. 2019

Environmental Management

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Functional connectivity modeling is increasingly used to predict the best spatial location for over-or underpasses, to mitigate road barrier effects and wildlife roadkills. This tool requires estimation of resistance surfaces, ideally modeled with movement data, which are costly to obtain. An alternative is to use occurrence data within species distribution models to infer movement resistance, although this remains a controversial issue. This study aimed both to compare the performance of resistance surfaces derived from path versus occurrence data in identifying road-crossing locations of a forest carnivore and assess the influence of movement type (daily vs. dispersal) on this performance. Resistance surfaces were built for genet (Genetta genetta) in southern Portugal using path selection functions with telemetry data, and species distribution models with occurrence data. An independent roadkill dataset was used to evaluate the performance of each connectivity model in predicting roadkill locations. The results show that resistance surfaces derived from occurrence data are as suitable in predicting roadkills as path data for daily movements. When dispersal was simulated, the performance of both resistance surfaces was equally good at predicting roadkills. Moreover, contrary to our expectations, we found no significant differences in locations of roadkill predictions between models based on daily movements and models based on dispersal. Our results suggest that species distribution models are a cost-effective tool to build functional connectivity models for road mitigation plans when movement data are not available.

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Section: Discussionmentioning

confidence: 93%

Section: Step (B) Model Buildingmentioning

confidence: 99%

Section: Comparison Of Model Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Accounting for Connectivity Uncertainties in Predicting Roadkills: a Comparative Approach between Path Selection Functions and Habitat Suitability Models

Valerio

Carvalho

Barbosa

et al. 2019

Environmental Management

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Individual variability in space use near power lines by a long‐lived territorial raptor

Marques

Palma

Lourenço

et al. 2022

Ecology and Evolution

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Evaluating species responses to anthropogenic infrastructures and other habitat changes is often used to assess environmental impacts and to guide conservation actions. However, such studies are generally carried out at the population level, disregarding inter‐individual variability. Here, we investigate population‐ and individual‐level responses toward power lines of a territorial raptor, the Bonelli's eagle A quila fasciata . We used GPS‐PTT tracking data of 17 adult eagles to model space use as a function of distance to transmission and distribution lines, while accounting for other habitat features known to affect this species. At population level, eagles increased the intensity of space use in the proximity of power lines (up to 1,000 m), suggesting an attraction effect. At individual level, some eagles shared the general population attraction pattern, while others showed reduced intensity of space use in the proximity of power lines. These differential responses were unrelated to the sex of individuals, but were affected by the characteristics of the power grid, with a tendency for apparent attraction to be associated with individuals occupying home ranges with a denser network of transmission lines and transmission pylons. However, the study could not rule out the operation of other potentially influential factors, such as individual idiosyncrasies, the spatial distribution of prey availability, and the availability of natural perches and nesting sites. Overall, these results suggest that power lines may drive different behaviors and have differential impacts across individuals, with those attracted to the proximity of power lines potentially facing increased risk of mortality through electrocution and collision, and those avoiding power lines being potentially subject to exclusion effects. More generally, our results reinforce the need to understand individual variability when assessing and mitigating impacts of anthropogenic infrastructures.

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Common Genet Genetta genetta (Linnaeus, 1758)

Gaubert,

Nores,

Camps

et al. 2023

Handbook of the Mammals of Europe

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The effects of a motorway on movement behaviour and gene flow in a forest carnivore: Joint evidence from road mortality, radio tracking and genetics

Cited by 23 publications

References 74 publications

Accounting for Connectivity Uncertainties in Predicting Roadkills: a Comparative Approach between Path Selection Functions and Habitat Suitability Models

Accounting for Connectivity Uncertainties in Predicting Roadkills: a Comparative Approach between Path Selection Functions and Habitat Suitability Models

Individual variability in space use near power lines by a long‐lived territorial raptor

Common Genet Genetta genetta (Linnaeus, 1758)

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