The Idaho Transportation Department is currently considering wildlife crossing structures for a segment of U.S. 20 near Island Park. High Country News recently published an extensive feature article exploring both support and opposition to this proposal: “When wildlife safety turns into fierce political debate.” WTI Road Ecologist Marcel Huijser was interviewed for the article, discussing the potential role and effectiveness of animal detection systems. The article also cites his research on the costs to society of vehicle crashes with deer and other large mammals.
Interested in Road Ecology research? Check out these recent and upcoming publications.
WOLVERINE TRAPPING: The Journal of Wildlife Management has published “The Sustainability of Wolverine Trapping Mortality in Southern Canada,” by Garth Mowat, Tony Clevenger, and their research team. It summarizes the team’s research study, in which they observed wolverines over a large area of southern British Columbia and Alberta, Canada, used spatial capture‐recapture models to estimate density, and calculated trapping kill rates using provincial fur harvest data. The study was also highlighted in a December feature story by the Wildlife Society: “Are southwest Canada wolverines being overharvested?”
Citation: Mowat, G., Clevenger, A.P., Kortello, A.D., Hausleitner, D., Barrueto, M., Smit, L., Lamb, C., DorsEy, B. and Ott, P.K. (2019), The Sustainability of Wolverine Trapping Mortality in Southern Canada. Jour. Wild. Mgmt.. doi:10.1002/jwmg.21787
EFFECTS OF ROADS IN LATIN AMERICA. In 2020, the Environmental Impact Assessment Review will publish “Effects of Roads on Terrestrial Vertebrate Species in Latin America,” co-authored by Tony Clevenger. It summarizes a review to qualitatively and quantitatively assess scientific research papers addressing road impacts on vertebrate species in Latin America. The paper also summarizes research gaps and recommends an approach for future research.
Citation: Pinto, F., Clevenger, A., and Grilo, C. (2020). Effects of Roads on Terrestrial Vertebrate Species in Latin America. Environmental Impact Assessment Review 81 (2020) 106337.
NIGHT-TIME SPEED LIMITS: The National Transportation Research Database (TRID) has posted the final report for the project “Effectiveness of Night-time Speed Limit Reduction in Reducing Wildlife-Vehicle Collisions.” For this project, Research Scientist Marcel Huijser and his partners investigated the effects of speed limit reductions at mule deer collision hotspots in Wyoming. The researchers studied the effects of the speed limits on vehicle speeds, on the interactions between wildlife and vehicles, and on the number of observed collisions.
Citation: Riginos, C., Fairbank, E. Hansen, J. Kolek & M. Huijser. 2019. Effectiveness of night-time speed limit reduction in reducing wildlife-vehicle collisions. Report No. FHWA-WY-1904F. Northern Rockies Conservation Cooperative, Jackson / The Nature Conservancy, Lander, Wyoming, USA. https://trid.trb.org/view/1659707
The WTI Road Ecology program, in partnership with the MSU Gianforte School of Computing, has completed a second phase of research on a system to simplify how wildlife vehicle collision (WVC) data is collected and shared among federal agencies.
The research program is sponsored by the National Center for Rural Road Safety, the National Park Service (NPS) and US Fish and Wildlife Service (USFWS) – the federal agencies want to develop and coordinate the use of a WVC Data Collection System with other federal land management agencies, state and local agencies, and other organizations. During Phase 1, Road Ecology researchers Rob Ament, Matthew Bell, and Kelley Hall, collaborating with MSU Computer Science professor Mike Wittie, developed a pilot WVC system called ROaDS – Roadkill Observation and Data System. It collects WVC roadkill observations and is available to all Department of Interior (DOI) agencies and bureaus.
During Phase 2, the research team developed recommendations for preliminary national standards for WVC data collection systems, which will promote collection and sharing of consistent data among agencies and partners. The team also made recommendations to modify the ROaDS survey (used for data collection) so it is shorter, easier to use, and more efficient. As part of the development process, team members determined that ROaDS can provide a valuable research function – it captures the observer’s route, how long it took to complete the route and each individual observation made while on that route. Phase 2 also included outreach activities, in which team members began to engage other agencies and organizations to jointly develop national standards for WVC data collection systems via meetings, presentations, and workshops at national conferences that will be continued in Phase 3.
The Federal Lands Wildlife-Vehicle Collision Data Coordination Project Phase 2 report is available on the WTI website. A new poster, which displays highlights from Phases 1 and 2 and proposed activities for Phase 3, is also available at the WVC Data Coordination Project Phase 2 webpage.
One of the country’s leading newspapers consulted a WTI researcher and several of our road ecology publications for a national feature story on wildlife crossings. “Retrofitting busy highways to let wildlife travel safely, too” explored national and state initiatives to identify wildlife corridors and enhance crossing structures such as underpasses and overpasses. The Post interviewed Road Ecology Program Manager Rob Ament, who discussed the potential long-term genetic consequences of highways that restrict wildlife movement and connectivity. The article also cites WTI/Montana Department of Transportation research on wildlife crossings on US 93 in Montana, and a cost-benefit analysis study that documented the direct and indirect costs of collisions with large animals.
The Jackson Hole News and Guide has published “Bridging a future for wildlife,” a feature article on proposed wildlife crossings structures for Wyoming highways. In the article, WTI Road Ecology Program Manager Rob Ament discusses how crossing structures can be highly effective in reducing collisions between vehicles and large mammals, especially if the locations are carefully sited and the structures are designed to meet the needs of the target species. WTI has conducted wildlife mitigation planning in Wyoming; Marcel Huijser, Rob Ament and the rest of the Road Ecology team collaborated on the development of the Teton County Wildlife Crossings Master Plan, completed in 2018.
In September, Research Ecologist Marcel Huijser was invited to present a training webinar for all the Regional Transportation Coordinators in the US Fish and Wildlife Services (USFWS). The topic for this training was “Road Ecology: Issues and Solutions on and for USFWS Refuges.” WTI has provided technical assistance to US Fish and Wildlife Service refuges on transportation-related issues for several years, through projects such as the Technical Support for National Wildlife Refuges project and the Workshop and Technical Support for USFWS project.
In other news related to Marcel’s research, his 2018 journal article in Biological Conservation on wildlife fencing continues to receive international attention. Last month, his co-author Andrew Jakes was interviewed about the research for a feature article in Der Spiegel, a leading news magazine in Germany.
Montana State University News Service published a feature story last week on Tony Clevenger’s wolverine research and also highlighted the story on the MSU website homepage.
“MSU research shows impact of major transportation corridor on wolverine movement” summarizes the findings from a multi-year study by Clevenger and his colleagues in Banff, Yoho and Kootenay National Parks. Their research showed that interstate highways in the area limit the movements of female wolverines, causing isolation that can negatively impact the rare species’ population stability and growth.
The results from this research, which used noninvasive genetic sampling methods to collect wolverine DNA samples, were published in the journal Biological Conservation this summer.
The final report for the Mapping the Wolverine Way project is available on the WTI website.
The final report is now available for a wildlife vehicle collision study conducted for the California Department of Transportation. Road Ecology Research Ecologist Marcel Huijser and Research Associate James Begley authored the final report for “Large Mammal-Vehicle Collision Hot Spot Analysis,” which provides guidance on the implementation of mitigation measures aimed at reducing collisions with large wild mammals along all state managed highways in California, with an emphasis on mule deer. These analyses identified the road sections that had the “highest” concentration of deer-vehicle crashes and mule deer carcasses. The hot spots were prioritized based on parameters related to human safety, biological conservation, and economics. Finally, the researchers provided practical guidelines for the implementation of mitigation measures and suggest mitigation strategies for the highest-ranking hot spots in each Caltrans district.
The report is available on the Hot Spot Analysis project page of the WTI website.