Weak effect of edges on avian nesting success in fragmented and forested landscapes in Ontario, Canada

摘要: We studied the effects of anthropogenic edges on predation and parasitism forest bird nests in an agriculturally fragmented landscape a continuously forested Ontario, Canada. Nesting data were collected at 1937 across 10 species from 2002–2008, 464 4 2006–2008. Brood only occurred landscape, was positively related to proportion rural grassland row crop habitats within 500-m nests. Daily nest survival negatively density roads but not influenced by distance edge either landscape. Predation rates higher for Ovenbird Rose-breasted Grosbeak nests, did differ between landscapes Veery American Redstart Uniformly high may be result (1) matrix predators that penetrate deep (>300 m) into interior, or (2) additive effect forest-dependent matrix-associated results pressure both interior habitats. Further research focused identification predators, their population dynamics, habitat use is required understand underlying mechanisms leading uniformly landscapes.