(1) Trailside vegetation was compared with undisturbed vegetation in a variety of vegetation types in a wilderness area in the northern Rocky Mountains, Oregon, U.S.A. (2) Cover was reduced and floristic composition changed along trails. (3) Measures of changes in cover and floristic composition were used to evaluate the relative susceptibility of different vegetation types to trailside alteration. (4) Densely forested vegetation was more altered by trails than the vegetation of meadows or open forests.
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David N. Cole (1978) studied this question.
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