NEST SURVIVAL RELATIVE TO PATCH SIZE IN A HIGHLY FRAGMENTED SHORTGRASS PRAIRIE LANDSCAPE

@inproceedings{Skagen2005NESTSR,
  title={NEST SURVIVAL RELATIVE TO PATCH SIZE IN A HIGHLY FRAGMENTED SHORTGRASS PRAIRIE LANDSCAPE},
  author={Susan K. Skagen and Amy A. Yackel Adams and Rodney D. Adams},
  year={2005}
}
Abstract Understanding the influences of habitat fragmentation on vertebrate populations is essential for the protection and ecological restoration of strategic sites for native species. We examined the effects of prairie fragmentation on avian reproductive success using artificial and natural nests on 26 randomly selected, privately owned patches of shortgrass prairie ranging in size from 7 to 454 ha within a cropland matrix in Washington County, Colorado, summer 2000. Survival trends of… Expand
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Abstract We examined the effects of habitat fragmentation and vegetation structure of shortgrass prairie and Conservation Reserve Program (CRP) lands on predation rates of artificial and naturalExpand
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Habitat fragmentation and the creation of extensive edges have been postulated as causes of higher nest predation in many species of birds. In this study we tested the hypothesis that predation onExpand
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It is argued that, based on edge avoidance behavior, “grassland-interior” species such as the Henslow's Sparrow respond to edge effects mainly by a decrease in density, whereas habitat generalists such asThe Dickcissel are affected mainly byA decrease in nesting success. Expand
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Increased predation by corvids and lower nest success in fragmented landscapes may have played a part in recent declines of some shrubsteppe birds, and future research should measure annual reproductive success of individual females and survival rates of juveniles and adults. Expand
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TLDR
Differences in nest-predation rates between large fragments and small fragments suggest that fragmentation of prairie habitats may be contributing to regional declines of grass- land birds and may require protection and restoration of large prairie areas. Expand
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These findings suggest that another process -- perhaps differential survivorship or dispersal - yields reduced abundance of ground-nesting species in habitat fragments, which would reflect that the strength of top-down forces across a landscape varies with characteristics of predator and prey and their autecological responses to ecological gradients. Expand
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