Amphibian populations are at risk of adverse impacts from roads and traffic. Roads constructed in the vicinity of wetlands and streams often interrupt amphibian movement pathways and can prevent individuals from accessing critical habitats. High numbers of amphibians are either deterred from crossing or killed by traffic, contributing to population declines. Although information on how best to mitigate the impacts of roads on amphibians is lacking in many areas of the world, several important lessons can be identified.
Roads and traffic contribute to amphibian mortality and population declines.
Planning the location of new roads to avoid amphibian habitat is critical.
Road construction should be timed to avoid periods of high amphibian activity.
Good design and placement of wildlife crossing structures is paramount.
Fencing must be designed to keep amphibians off the road.
Construction of replacement ponds as mitigation and compensation measures may provide solutions.
Wildlife crossing structures and fences must be maintained at least annually and to a high standard.
Some circumstances involve management of traffic flow and assistance with amphibian migrations.
The effectiveness of mitigation for amphibians should be studied pre‐ and post‐construction.
Owing to the uncertainty surrounding the ability of crossing structures to mitigate road impacts for many amphibians, design and installation must be done under supervision by experienced and qualified biologists, and effectiveness demonstrated through monitoring. This approach is especially warranted in areas outside of Europe and North America, where there is little information on amphibian usage rates of crossing structures.
Making a Safe Leap Forward
Mitigating Road Impacts on Amphibians
Handbook of Road Ecology ; 261-270
2015-04-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
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