“…Small-mammal communities provide good models for studying such impacts because species in these communities generally use a wide variety of resources, have short generation times that allow for quick detection of environmental changes, may be permanent residents of a site, and usually respond to disturbances in a perceptible and measurable way (Steele et al 1984). Roads can impact smallmammal communities by: (1) creating an edge with different habitat characteristics (Garland and Bradley 1984, Tyser and Worley 1992, Bellamy et al 2000; (2) promoting the introduction of exotic species (Getz et al 1978, Vermeulen and Opdam 1995, Underhill and Angold 2000; (3) increasing stress and reducing survival (Benedict and Billeter 2004) through disturbance and contamination (Jefferies and French 1972, Williamson and Evans 1972, Quarles et al 1974; (4) blocking movement, causing genetic barriers and home range rearrangements (Oxley et al 1974, Garland and Bradley 1984, Mader 1984, Swihart and Slade 1984, 1990, Merriam et al 1989, Gerlach and Musolf 2000; and finally, (5) causing direct road mortality (Wilkins and Schmidly 1980, Ashley and Robinson 1996, Mallick et al 1998.…”