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Effects of Grazing on Lizard Abundance and Diversity in Western Arizona

K. Bruce Jones
The Southwestern Naturalist
Vol. 26, No. 2 (May 21, 1981), pp. 107-115
DOI: 10.2307/3671106
Stable URL: http://www.jstor.org/stable/3671106
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Grazing on Lizard Abundance and Diversity in Western Arizona
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Abstract

Lizard populations sampled on heavily grazed chaparral, desert grassland, mixed riparian scrub, and cottonwood-willow vegetative communities were characterized by lower relative abundance and species diversity indices than those of similar, lightly grazed sites. Lower relative abundance and diversity at heavily grazed sites were a result of vegetative structures that favored lizards who forage while roosting on trees, downed tree limbs, or under trees. Lightly grazed sites were characterized by vegetative structures that favored a wide variety of foraging styles. There were no differences in lizard abundance and diversity between lightly and heavily grazed Sonoran Desertscrub. Similarities in lizard abundance and diversity of lightly and heavily grazed Sonoran Desertscrub were attributed to similarities in vegetative structure.

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