Study

General versus specific surveys: Estimating the suitability of different road-crossing structures for small mammals

  • Published source details D'Amico M., Clevenger A.P., Román J. & Revilla E. (2015) General versus specific surveys: Estimating the suitability of different road-crossing structures for small mammals. The Journal of Wildlife Management, 79, 854-860

Actions

This study is summarised as evidence for the following.

Action Category

Install overpasses over roads/railways

Action Link
Terrestrial Mammal Conservation

Install tunnels/culverts/underpass under roads

Action Link
Terrestrial Mammal Conservation
  1. Install overpasses over roads/railways

    A replicated study in 2009 at two sites along a highway through forest in Alberta, Canada (D'Amico et al. 2015) found that North American deer mice Peromyscus maniculatus, southern red-backed voles Myodes gapperi and meadow voles Microtus pennsylvanicus used overpasses to cross a road. Deer mouse tracks were recorded in 75% of track tubes established on overpasses. Southern red-backed vole tracks were detected in 15% and meadow vole in 5% of track tubes. Over two weeks in September–October 2010, small mammals were surveyed on two 50-m-wide wildlife overpasses above the Trans-Canada Highway. Overpasses consisted of sparse young trees, shrubs and open grassland. Two parallel sample lines, each with five 30 cm long × 10 cm diameter track tubes, with sooted metal sheet as a floor, were placed in the centre of each overpass. Mammals were identified from their footprints.

  2. Install tunnels/culverts/underpass under roads

    A study in 2009 at 10 sites along a highway through forest in Alberta, Canada (D'Amico et al. 2015) found that North American deer mice Peromyscus maniculatus used underpasses to cross a road but meadow voles Microtus pennsylvanicus and southern red-backed voles Myodes gapperi did not. Tracks of deer mice were recorded in 90% of track tubes in elliptical culverts, in 87% of track tubes in box culverts and in 75% of track tubes on open-span bridge underpasses. No tracks of meadow vole or southern red-backed vole were detected, despite their use of overpasses in the area. Over two weeks in September–October 2010, small mammals were surveyed in three elliptical metal culverts (4 m high, 7 m wide), five concrete box culverts (2.6 m high, 3.2 m wide) and two open-span bridge underpasses (3 m high, 11 m wide). Underpasses were unvegetated and entrances were characterized by roadside grasslands. Two parallel sample lines, each of five 30 × 10 cm track tubes with sooted metal sheet as a floor, were placed in the centre of each underpass. Mammals were identified from their footprints.

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust