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Providing evidence to improve practice

Individual study: Small mammals in modified Pinyon-Juniper woodlands, New-Mexico

Published source details

Severson K.E. (1986) Small mammals in modified Pinyon-Juniper woodlands, New-Mexico. Journal of Range Management, 39, 31-34


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Use prescribed burning Terrestrial Mammal Conservation

A replicated, controlled study in 1981–1983 of a pinyon-juniper woodland in New Mexico, USA (Severson 1986) found that felled forest areas that were burned did not have more small mammals than did felled unburned areas 13–18 years after treatment. A similar number of small mammals was caught in stands that were bulldozed and burned (408) as in stands that were bulldozed without burning (433). Fewer were caught in undisturbed stands (246). Treatment plots, c.120 ha each, were established in each of two woodland blocks, one in 1965, one in 1970. In each block, one plot was bulldozed (trees pushed over and left), one was bulldozed with trees pushed and piled, then burned and one was undisturbed. Small mammals were trapped in the second and third week of September, each year, in 1981–1983. Each plot was sampled for four days each year.

(Summarised by Nick Littlewood)

Remove vegetation by hand/machine Terrestrial Mammal Conservation

A replicated, controlled study in 1981–1983 of a pinyon-juniper woodland in New Mexico, USA (Severson 1986) found that 13–18 years after treatment, felled or thinned stands had more small mammals than did undisturbed stands. The number of animals caught in stands that were thinned (432) or bulldozed (433) did not differ from each other but both were greater than the number in undisturbed stands (246). Species composition differed, with more grassland species in bulldozed stands (bulldozed: 95–175; thinned: 35; undisturbed: 46) and more woodland mice in thinned stands (thinned: 58; bulldozed: 6–11; undisturbed: 26). Plots, approximately 120 ha each, were established in each of two woodland blocks, one in 1965, one in 1970. In each block, one plot was thinned (trees ≥6.1 m apart), one was bulldozed (trees pushed over and left) and one was undisturbed. Small mammals were trapped in the second and third week of September, each year, in 1981–1983. Each plot was sampled for four days each year.

(Summarised by Nick Littlewood)