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• W2183407483 abstract "I made a selective review of studies conducted in shrublands and grasslands of Chile, Argentina, and Uruguay, in which population levels of small mammals had been assessed, information on the diet of local predators had been reported, and/or presumed effects of predation had been discussed. The information available supports the following generalizations: 1) Predators seem to concentrate on the most abundant native rodents (e.g., Octodon degus in Chile; Microcavia australis, Cavia aperea, and Akodon azarae in Argentina; and Cavia aperea in Uruguay), consuming the remaining mammal species about in proportion to their relative abundances, but sometimes ignoring abundant introduced lagomorphs (e.g., Oryctolagus cuniculus). 2) The most preyed-upon rodents tend to be of large size (> 200 g) and usually are diurnal folivores. 3) Population levels of these rodents are sometimes depressed by predation but predators do not seem capable of driving them to extinction, except in very small habitat patches, and perhaps only temporarily. 4) Predators seem effective in restricting the spatial activity patterns of their main prey to the vicinity of protective cover (e.g., bushes, burrows, rock piles), which usually are interconnected by tunnels, galleries, and/or runways. 5) Intensive removal of herbs caused by rodent foraging in the periphery of cover or shelter generates characteristic bare zones. 6) Low predation upon introduced lagomorphs (e.g., Oryctolagus cuniculus in Chile) has resulted in the expansion of their habitat use, which has affected the physiognomy and vegetational composition of the areas invaded. 7) In general, the different predation pressures upon small mammals directly affect their spatial activities, and indirectly, their impact on the habitats they occupy." @default.
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• W2183407483 date "1986-01-01" @default.
• W2183407483 modified "2023-09-24" @default.
• W2183407483 title "Predation upon small mammals in shrublands and grasslands of southern South America: ecological correlates and presumable" @default.
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