作者: Miriam Goosem
DOI: 10.1071/WR99093
关键词: Culvert 、 Rainforest 、 Ecology 、 Biology 、 Tropical rainforest 、 Biodiversity 、 Seasonal breeder 、 Uromys caudimaculatus 、 Melomys cervinipes 、 Biological dispersal
摘要: Along a narrow, unsealed road through rainforest in north-eastern Queensland, movements of small mammals were examined to determine whether the would inhibit crossings, thereby causing linear barrier effects. Crossings 12- or 20-m-wide clearing by Melomys cervinipes severely inhibited, crossing inhibition Rattus sp. was less severe, while crossings Uromys caudimaculatus unaffected. This differential effect attributed species differences size, mobility and behaviour. Baiting on only one side increased rates for all species. During breeding season, 20-m clearings almost completely inhibited significantly fewer than 12-m clearings. Clearing width had little rate outside season. Seasonal dispersal juvenile animals appeared explain this discrepancy clearing-width likely cross where there no vegetative cover at entrance culvert both entrances. Linear effects may be mitigated narrower road-clearing widths, replanting grassy verges resulting entrances canopy closure above road, providing more faunal underpasses.