Effects of Habitat on Dickcissel Abundance and Nest Success in Conservation Reserve Program Fields in Kansas

摘要: Declining avian populations in the Midwest have increased interest various aspects of grassland habitats and their effects on birds. We studied vegetation characteristics, woody field edges, surrounding land use abundance daily nest survival dickcissel (Spiza americana) Conservation Reserve Program (CRP) fields northeastern Kansas. observed 873 dickcissels during surveys 11 CRP summers 1994 1995. In those fields, we located 186 nests which 13.2% were successful 14.9% The vertical density wooded area amount edge bordering associated with (P = 0.001). Live dead canopy cover litter 0.005). Therefore, habitat quality for might be enhanced by modifying characteristics. outcome any modifications should judged changes number success rather than