If you build it, will they come? A comparative landscape analysis of ocelot roadkill locations and crossing structures
Wildlife-vehicle collisions can have a substantial influence on the mortality rates of many wildlife populations. Crossing structures are designed to mitigate the impact of road mortality by allowing safe passage of wildlife above or below roads, and connect to suitable areas on both sides of the ro...
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| Veröffentlicht in: | PloS one 2022-05, Vol.17 (5), p.e0267630-e0267630 |
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| creator | Blackburn, AnnMarie Veals, Amanda M Tewes, Michael E Wester, David B Young, Jr, John H DeYoung, Randy W Perotto-Baldivieso, Humberto L |
| description | Wildlife-vehicle collisions can have a substantial influence on the mortality rates of many wildlife populations. Crossing structures are designed to mitigate the impact of road mortality by allowing safe passage of wildlife above or below roads, and connect to suitable areas on both sides of the road. Ocelots (Leopardus pardalis) are a federally endangered felid in the United States, with remnant populations of 1,050 m from the road, and 1.2-5.8 ha larger herbaceous patches >450 m from the road compared to ocelot-vehicle collision sites. Additionally, many crossing structures installed during the 1990's are situated >100 km away from an extant ocelot population. Results from this study can guide conservation planners to place future road crossing structures in areas more likely to be used by ocelots. Our results also emphasize that reliable scientific data must be used for effective mitigation efforts. In the absence of data, post-installation assessments can improve the placement of future structures. |
| doi_str_mv | 10.1371/journal.pone.0267630 |
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A comparative landscape analysis of ocelot roadkill locations and crossing structures</title><source>MEDLINE</source><source>DOAJ Directory of Open Access Journals</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Public Library of Science (PLoS) Journals Open Access</source><source>PubMed Central</source><source>Free Full-Text Journals in Chemistry</source><creator>Blackburn, AnnMarie ; Veals, Amanda M ; Tewes, Michael E ; Wester, David B ; Young, Jr, John H ; DeYoung, Randy W ; Perotto-Baldivieso, Humberto L</creator><contributor>Weckerly, Floyd W</contributor><creatorcontrib>Blackburn, AnnMarie ; Veals, Amanda M ; Tewes, Michael E ; Wester, David B ; Young, Jr, John H ; DeYoung, Randy W ; Perotto-Baldivieso, Humberto L ; Weckerly, Floyd W</creatorcontrib><description>Wildlife-vehicle collisions can have a substantial influence on the mortality rates of many wildlife populations. Crossing structures are designed to mitigate the impact of road mortality by allowing safe passage of wildlife above or below roads, and connect to suitable areas on both sides of the road. Ocelots (Leopardus pardalis) are a federally endangered felid in the United States, with remnant populations of <80 individuals remaining in the Lower Rio Grande Valley of South Texas. Vehicle collisions are the greatest known source of mortality for ocelots in Texas. Crossing structures designed for ocelot use have been implemented throughout South Texas since the 1990s, however, ocelots rarely use them. We compared landscape characteristics between ocelot crossing structures and ocelot-vehicle collision sites. We quantified the spatial distribution of woody and herbaceous cover types surrounding ocelot crossing structures (n = 56) and ocelot-vehicle collision sites (n = 26) at multiple spatial extents and compared landscape metrics between these location types. The landscape surrounding ocelot crossing structures had 17-22% more open herbaceous cover >1,050 m from the road, and 1.2-5.8 ha larger herbaceous patches >450 m from the road compared to ocelot-vehicle collision sites. Additionally, many crossing structures installed during the 1990's are situated >100 km away from an extant ocelot population. Results from this study can guide conservation planners to place future road crossing structures in areas more likely to be used by ocelots. Our results also emphasize that reliable scientific data must be used for effective mitigation efforts. 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A comparative landscape analysis of ocelot roadkill locations and crossing structures</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2022-05-03</date><risdate>2022</risdate><volume>17</volume><issue>5</issue><spage>e0267630</spage><epage>e0267630</epage><pages>e0267630-e0267630</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Wildlife-vehicle collisions can have a substantial influence on the mortality rates of many wildlife populations. Crossing structures are designed to mitigate the impact of road mortality by allowing safe passage of wildlife above or below roads, and connect to suitable areas on both sides of the road. Ocelots (Leopardus pardalis) are a federally endangered felid in the United States, with remnant populations of <80 individuals remaining in the Lower Rio Grande Valley of South Texas. Vehicle collisions are the greatest known source of mortality for ocelots in Texas. Crossing structures designed for ocelot use have been implemented throughout South Texas since the 1990s, however, ocelots rarely use them. We compared landscape characteristics between ocelot crossing structures and ocelot-vehicle collision sites. We quantified the spatial distribution of woody and herbaceous cover types surrounding ocelot crossing structures (n = 56) and ocelot-vehicle collision sites (n = 26) at multiple spatial extents and compared landscape metrics between these location types. The landscape surrounding ocelot crossing structures had 17-22% more open herbaceous cover >1,050 m from the road, and 1.2-5.8 ha larger herbaceous patches >450 m from the road compared to ocelot-vehicle collision sites. Additionally, many crossing structures installed during the 1990's are situated >100 km away from an extant ocelot population. Results from this study can guide conservation planners to place future road crossing structures in areas more likely to be used by ocelots. 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| subjects | Animal populations Animals Animals, Wild Biology and Life Sciences Collisions Communication Conservation Ecology and Environmental Sciences Endangered & extinct species Engineering and Technology Evaluation Felidae Grasslands Habitats Humans Leopardus pardalis Mitigation Mortality Open data People and places Population studies Populations Provinces Road construction Roads Roads & highways Spatial distribution Texas - epidemiology Transportation planning Wildlife |
| title | If you build it, will they come? A comparative landscape analysis of ocelot roadkill locations and crossing structures |
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