CIR 1484: Use of Amphibians as Indicators of Ecosystem Restoration Success
Figure 7. Eight sampling points with a surrounding 500-meter buffer. The blue lines are off-road vehicle (ORV) trails, and the length of ORV trail segments within the green circles is the basis of the ORV index.
Credit: Hardin Waddle 2004; Adapted from Welch, et. al 1998
