- Small, Mary F.
University of Maine Graduate School
The effects of abrupt forest-estuarine river and forest-powerline edges upon passerine and small mammal richness and density, and the effect of forest fragmentation upon songbird nesting success were investigated. Passerines were censused along line transects perpendicular to an edge on 4 study areas. Two study areas were beside rivers, and two beside powerlines. Densities were estimated with a modification of Emlen's technique. Density and richness were not consistently greater near either edge type in the forest interior. Richness within 30 m of powerlines was greater than richness from 60 to 90M of them. Different edge species occurred in the powerline and river edges.