Identifying road mortality threat at multiple spatial scales for semi-aquatic turtles

Beaudry, Frédéric; DeMaynadier, P. G.; Hunter, Malcolm L.

doi:10.1016/j.biocon.2008.07.016

Cited by 119 publications

(99 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, attributes of social links can be used to represent the intensity of a relation, or to denote that two actors have an indirect relation through membership in the same cross-boundary organization (VanceBorland and Holley 2011). Ecological links can be weighted based on matrix quality; for example, how roads affect amphibian movement (Beaudry et al 2008). Also, the social-ecological links between actors and resources can be further specified, for example, by differentiating types of management activities and ecosystem services, or by linking actors and resources across space (like when services and environmental impacts are transported to other locations) (Seitzinger et al 2012).…”

Section: Resultsmentioning

confidence: 99%

The problem of spatial fit in social-ecological systems: detecting mismatches between ecological connectivity and land management in an urban region

Bergsten¹,

Galafassi²,

Bodin³

2014

E&S

View full text Add to dashboard Cite

ABSTRACT. The problem of institutional fit in social-ecological systems has been empirically documented and conceptually discussed for decades, yet there is a shortage of approaches to systematically and quantitatively examine the level of fit. We address this gap, focusing on spatial fit in an urban and peri-urban regional landscape. Such landscapes typically exhibit significant fragmentation of remnant habitats, which can limit critical species dispersal. This may have detrimental effects on species persistence and ecosystem functioning if land use is planned without consideration of the spatial patterns of fragmentation. Managing habitat fragmentation is particularly challenging when the scale of fragmentation reaches beyond the control of single managers, thereby requiring different actors to coordinate their activities to address the problem at the appropriate scale. We present a research approach that maps patterns of collaborations between actors who manage different parts of a landscape, and then relates these patterns to structures of ecological connectivity. We applied our approach to evaluate the fit between a collaborative wetland management network comprising all 26 municipalities in the Stockholm County in Sweden and an ecologically defined network of dispersed but ecologically interconnected wetlands. Many wetlands in this landscape are either intersected by the boundary between two or more municipalities, or are located close to such boundaries, which implies a degree of ecological interconnectedness and a need for intermunicipal coordination related to wetland management across boundaries. We first estimated the level of ecological connectivity between wetlands in neighboring municipalities, and then used this estimate to elaborate the level of social-ecological fit vis-à-vis intermunicipal collaboration. We found that the level of fit was generally weak. Also, we identified critical misalignments of ecological connectivity and intermunicipal collaboration, respectively, as well as collaborations that represented an adequate alignment. These findings inform on where to most effectively allocate limited resources of collaborative capacity to enhance the level of social-ecological fit. Our approach and results are illustrated using maps, which facilitates the potential application of this method in land use planning practice.

show abstract

Section: Resultsmentioning

confidence: 99%

The problem of spatial fit in social-ecological systems: detecting mismatches between ecological connectivity and land management in an urban region

Bergsten¹,

Galafassi²,

Bodin³

2014

E&S

View full text Add to dashboard Cite

show abstract

“…We measured the surface area of each component wetland, and the length of each causeway in terms of (a) the overlap of the two wetlands parallel with the road within 100 m of it (causeway overlap zone), (b) maximum length of road that had wetland components of the causeway on at least one side of the road within 100 m of it, and (c) the maximum length of the causeway (measure b) plus an additional 100 m road segment beyond each limit of the causeway. We used multiple measures of causeway length because the width of the crossing zone of turtles moving between wetlands is unknown and dependent on tortuosity and directedness of orientation of the turtles' movement paths (Beaudry et al 2008). Additional measurements for each causeway included AADT, minimum distance between the paired causeway wetlands, and surface area of the component wetlands.…”

Section: Causeways As Features Associated With Road-kill Hotspotsmentioning

confidence: 99%

“…Turtles are demographically sensitive to additive increases in adult mortality (Congdon et al 1994;Heppell 1998), and simulations of turtle movements within road networks indicate that road mortality may be high enough to cause population declines in regions where road networks are dense and traffic volumes are high (Gibbs and Shriver 2002;Beaudry et al 2008;Litvaitis and Tash 2008). Indeed, populations of some turtle species are lower or altered in structure near roads or within regions that have a dense road network (e.g.…”

Section: Introductionmentioning

confidence: 97%

Road mortality in freshwater turtles: identifying causes of spatial patterns to optimize road planning and mitigation

Langen

Gunson²,

Scheiner

et al. 2012

Biodivers Conserv

View full text Add to dashboard Cite

Road mortality of freshwater turtles can be high enough to imperil populations near roads, thus there is a need to efficiently and accurately locate regions of excessive roadkill along road networks for mitigation. Weekly over 2 years, we drove a 160 km highway circuit in northeastern New York State, USA and recorded the location of all detected roadkill of three freshwater turtle species (Chelydra serpentina, Chrysemys picta, Emydoidea blandingii). We then analyzed the spatial dispersion of road-kill and the road and landscape features associated with road-kill locations. Road-kill was most prevalent at a limited number of short road segments, termed 'hotspots'. The locations of hotspots, as indicated by kernel density analysis, and the peak spatial extent of hotspots (250 m), as indicated by Ripley's K, corresponded to the locations and average lengths of causeways (road segments with wetlands within 100 m on both sides). Hotspots were located at causeways that were greater than 200 m length and characterized by high traffic volumes, close proximity to water, and high forest coverage. We conclude that freshwater turtle road mortality is spatially aggregated at short, severe hotspots, and hotspot locations can be predicted when the locations of wetlands, traffic volumes, and the land-uses bordering roads are known. Hotspot models using these predictors can locate sites along a road network that are the most promising for mitigation to reduce excessive road mortality and maintain connectivity.

show abstract

“…Identifying hotspots for roadkill is crucial for protection planners. Although peaks for road fatalities vary among species (Mysterud, 2004), breeding seasons correspond to high incidences of roadkill (Beaudry et al, 2008;.…”

Section: Introductionmentioning

confidence: 99%

Identifying the hotspots of wildlife–vehicle collision on the Çankırı–Kırıkkale highway during summer

Özcan¹,

Özkazanç²

2017

Turk J Zool

View full text Add to dashboard Cite

In this study, we identified hotspots of mammal-vehicle collisions that occurred on the Çankırı-Kırıkkale highway between May and October 2014. We collected 58 records from 6 species. Sixteen casualties occurred on the part of the road with low traffic volume (1818 vehicles/day) and 42 casualties occurred on the part with moderate traffic volume (4680 vehicles/day). The two species with the highest number of records were hedgehog Erinaceus concolor (n = 27) and red fox Vulpes vulpes (n = 21). Hotspots of mammalvehicle collisions were detected with the CrimeStat3 program using 750-m bandwidth. We identified two spots of high incidence of roadkill and 3 spots of moderate incidence of roadkill on the highway. Strategies to reduce the incidence of roadkill should be considered for these hotspots.

show abstract

Identifying road mortality threat at multiple spatial scales for semi-aquatic turtles

Cited by 119 publications

References 72 publications

The problem of spatial fit in social-ecological systems: detecting mismatches between ecological connectivity and land management in an urban region

The problem of spatial fit in social-ecological systems: detecting mismatches between ecological connectivity and land management in an urban region

Road mortality in freshwater turtles: identifying causes of spatial patterns to optimize road planning and mitigation

Identifying the hotspots of wildlife–vehicle collision on the Çankırı–Kırıkkale highway during summer

Contact Info

Product

Resources

About