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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
Impacts Of Agricultural Tillage On Grassland Birds In Western South Dakota, Julie R. Dejong, David E. Naugle, Kristel K. Bakker, Frank R. Quamen, Kenneth F. Higgins
Impacts Of Agricultural Tillage On Grassland Birds In Western South Dakota, Julie R. Dejong, David E. Naugle, Kristel K. Bakker, Frank R. Quamen, Kenneth F. Higgins
Proceedings of the North American Prairie Conferences
Xeric, mixed-grass landscapes are changing rapidly as native grasslands are converted to cropland. We surveyed birds to compare their use of grassland and cropland habitats and to evaluate whether their abundances were related to grassland fragment size. Surveys were conducted in western South Dakota at 146 sites that were stratified by habitat type, landscape composition and fragment size. The abundances of 13 of 14 species were 1.2-140 times higher in grass- lands than in cropland. Greater prairie-chicken, sharp-tailed grouse, burrowing owl, Baird's sparrow, northern harrier, and short-eared owl never occurred in cropland. Abundances of grasshopper sparrow, western meadowlark and chestnut-collared …
Response Of Grassland Birds To Fire On A Wisconsin Sand Prairie Over An 18-Year Period, Greg Geller, David Sample, Rich Henderson
Response Of Grassland Birds To Fire On A Wisconsin Sand Prairie Over An 18-Year Period, Greg Geller, David Sample, Rich Henderson
Proceedings of the North American Prairie Conferences
The relative abundance of grassland birds was estimated on an 81-ha (200-acre) dry to dry-mesic sand prairie in south, west Wisconsin over an 18-year period (1987-2004). Birds were surveyed three times during the breeding season on seven, 2-ha (5-acre) strip transects in six different burn units. We compared results to time since fire and other habitat features. The average rotation of prescribed fires in the burn units ranged from three to six years. Seven species were selected for detailed analysis. These were grasshopper sparrows (Ammodramus savannarum),-18-year average of 1.33 birds per ha, field sparrows (Spizella pusilla) …