Impact of road mitigation measures on amphibian populations: A stage-class population mathematical model

摘要: It is now well established that amphibians are suffering widespread decline and extinctions. Among other causes, urbanization responsible for habitat reduction, fragmentation massive road kills. In this context, it urgent to develop assess appropriate conservation measures. Using yearly censuses of migrating adults two anuran species at one location in Switzerland, we examined the impact a mitigation measure - permanent under-road tunnels with guiding trenches along separating wintering forests from breeding wetlands. We observe adult populations do not exhibit any long-term trend but undergo transient increase few years after installation measure. additional datasets like climatic data obtained control area, show observed pattern cannot be explained by our disposal. then checked as working hypothesis whether could explain or not. To end, use simple population model together competition resources can successfully experimental observations. conclude discussing requirements further assessment consequences planners.