Abstract
Species richness (S) and abundance of small mammals were studied for a total of 10,800 trap nights during autumn 1985 and 1986 in a mixed-oak (Quercus spp.) forest in central Pennsylvania, part of which was irrigated with wastewater (chlorinated sewage effluent). Understory tree and shrub densities were less (P 0.05) between irrigated and nonirrigated sites, whereas numbers of white-footed mice (Peromyscus leucopus) and southern red-backed voles (Clethrionomys gapperi) were higher (P < 0.05) on irrigated sites. Populations of P. leucopus on irrigated sites also had significantly greater proportions of adults than on nonirrigated sites.
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