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Grassland Bird Use Of Crp Fields That Differ By Age-Class And Cover Type, Kristel K. Bakker, Sarah L. Eggebo, Kenneth F. Higgins, David E. Naugle
Grassland Bird Use Of Crp Fields That Differ By Age-Class And Cover Type, Kristel K. Bakker, Sarah L. Eggebo, Kenneth F. Higgins, David E. Naugle
Proceedings of the North American Prairie Conferences
During the past 50 years increasing agricultural practices have transformed native habitats into row~crop fields, making the Conservation Reserve Program (CRP) grass lands important habitat for wildlife populations. Limited information exists on how nongame grassland bird species relate to different stand ages and cover types of Conservation Reserve Program. Conservation Reserve Program grassland study sites (n = 42) were stratified by stand age (old [10-13 years] and new [0-3 years] grasslands), and cover types (CPI-cool-season grasslands and CPZ-warm-season grasslands) in eastern South Dakota. Field age rather than cover type was more predictive of grassland bird occurrence and density. Sedge wrens …
Could The Area-Sensitivity Of Some Grassland Birds Be Affected By Landscape Composition?, David Joseph Horn, Rolf R. Koford
Could The Area-Sensitivity Of Some Grassland Birds Be Affected By Landscape Composition?, David Joseph Horn, Rolf R. Koford
Proceedings of the North American Prairie Conferences
Several grassland bird species have been shown to be area sensitive. This area sensitivity occurs when a species' frequency of occurrence, or relative abundance, tends to be lower in smaller fields. The detection of area sensitivity, however, is not consistent among studies because a species may exhibit area sensitivity in one study, but not in another. We tested the hypothesis that a species' area sensitivity varies depending on the amount of grassland in the landscape. The study took place in central North Dakota during the 1996 and 1997 breeding seasons on 46 fields enrolled in the Conservation Reserve Program (CRP). …