Some animals are seen to be at greater risk of road mortality than others. For example, the impact of road mortality on reptile and amphibian populations is thought to be more significant than on small mammals (Bennett 1991; Fahrig et al. 1995; Rudolph et al. 1999).The impact of road mortality on endangered species is also often high. In Queensland, a population of the southern cassowary (Casuarius casuarius johnsonii) decreased by around 14% over three years due to road mortality (Bentrupperbaumer 1988, cited in Goosem, 1997). Generally, however, common species are killed most frequently, and the proportion of mortality attributable to roads is usually only a small percentage of the total mortality of a population (Coulson 1985). Nevertheless, it has been suggested that road mortality has a greater, and more direct, impact on the persistence of wildlife populations than reduced movement caused by roads (Jaeger & Fahrig 2001, cited in Fahrig 2001).
Some animals are seen to be at greater risk of road mortality than others. For example, the impact of road mortality on reptile and amphibian populations is thought to be more significant than on small mammals (Bennett 1991; Fahrig et al. 1995; Rudolph et al. 1999).The impact of road mortality on endangered species is also often high. In Queensland, a population of the southern cassowary (Casuarius casuarius johnsonii) decreased by around 14% over three years due to road mortality (Bentrupperbaumer 1988, cited in Goosem, 1997). Generally, however, common species are killed most frequently, and the proportion of mortality attributable to roads is usually only a small percentage of the total mortality of a population (Coulson 1985). Nevertheless, it has been suggested that road mortality has a greater, and more direct, impact on the persistence of wildlife populations than reduced movement caused by roads (Jaeger & Fahrig 2001, cited in Fahrig 2001).
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