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Showing 1 to 20 of 33 for “"Grassland Bird"”.
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Grassland bird associations in a managed agricultural matrix
<p>Continued declines of grassland bird populations in the U.S. are largely attributed to grassland loss from conversion to agriculture. Habitat establishment efforts by the U.S. Department of Agriculture (USDA) may stem these declines given adequate ecological insight to guide management …
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Using Occupancy Models to Predict Grassland Bird Distributions in Southeastern Alberta
Widespread population declines of grassland birds have stimulated a variety of conservation plans, many of which promote a landscape approach to conservation. Identifying needs for survival and reproduction, and prioritizing key habitat requirements that influence where species occur on the …
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Comparison of grassland bird stopover and breeding habitat use in Illinois
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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A Landscape Approach to Grassland Bird Conservation in the Prairie Pothole Region of the Northern Great Plains
… is one of the most imperiled ecosystems, and grassland birds have experienced steeper and more consistent declines than any other group of birds in North America. Habitat-based planning tools are a cornerstone of conservation in forested ecosystems, but remain a novel approach in grasslands. …
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A Landscape Approach to Grassland Bird Conservation in the Prairie Pothole Region of the Northern Great Plains
… is one of the most imperiled ecosystems, and grassland birds have experienced steeper and more consistent declines than any other group of birds in North America. Habitat-based planning tools are a cornerstone of conservation in forested ecosystems, but remain a novel approach in grasslands. …
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EFFECTS OF SCALE AND HABITAT MANAGEMENT ON GRASSLAND BIRD RESPONSE IN CONSERVATION RESERVE PROGRAM FIELDS IN NORTHWEST ILLINOIS
North American populations of grassland birds have been declining consistently for the past several decades. Grassland birds respond to multiple scales which encompass a spectrum of habitat variables, and the habitat scale of importance may depend on the response of interest. For practitioners, …
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Influence Of Landscape Spatial Patterns And Land Use Planning On Grassland Bird Habitat Occupancy In Chester County, Pennsylvania
Throughout their range, North American grassland birds as a group have shown steeper and more widespread population declines than any other avian guild. Grassland bird decline corresponds to habitat loss, landscape fragmentation, agricultural intensification, and changes in land management. In …
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Influence of Habitat Disturbances on Endemic Grassland Bird Distributions in Loamy Ecological Range Sites at Canadian Forces Base Suffield, Alberta
Many grassland birds are at risk and habitat disturbance may have an important influence on the persistence of these species. Military bases provide an opportunity to examine the influence of habitat disturbance on grassland birds, whose distributions are influenced by vegetation structure. Spatial …
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Nesting Success of Dickcissel (Spiza americana) and Non-breeding Grassland Bird Use of Northwest Arkansas’ Remnant and Restored Tallgrass Prairies
<p>Dwindling populations of North American grassland birds are linked to habitat loss. Tallgrass prairie only covers 3% of its pre-settlement-era range. Small-scale restoration projects attempt to increase acreage for prairie avifauna, and while some breeding grassland species are present at these …
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The Genetic Consequences of Fragmentation and Small Population Size in Two Grassland Bird Species: The Greater Rhea and the Greater Prairie Chicken
"In addition, genetic analysis of four extant populations of the greater prairie chicken and museum specimens from a prebottlenecked population along with ecological data on population fitness allowed me to directly assess the effects of a demographic bottleneck on the genetic diversity and fitness …
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Habitat use, nest success, and management recommendations for grassland birds of the Canaan Valley National Wildlife Refuge, West Virginia
Grassland bird populations have been declining due to increased habitat fragmentation, urbanization, and conversion of farmlands to other uses throughout the United States. However, idle hayfields and pastures in the eastern United States may provide adequate nesting habitat for grassland species …
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Modeling Detection and Density Using Distance Sampling for Three Priority Grassland Bird Species in Texas - Northern Bobwhite (Colinus virginianus), Eastern Meadowlark (Sturnella magna), and Painted Bunting (Passerina ciris)
In Texas, three priority grassland species have experienced declines due to the loss of native grasslands. These species are the Northern Bobwhite (Colinus virginianus), Eastern Meadowlark (Sturnella magna), and Painted Bunting (Passerina ciris). Due to this, accurate density and abundance …
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Habitat selection and breeding ecology of grassland birds in areas managed with fire and grazing
Conversions of grasslands to row crop agriculture over recent decades have contributed to steep declines in grassland bird populations in the Midwest. On top of habitat loss, the cessation of historic disturbance regimes on remaining grasslands has served to homogenize vegetation structure. Because …
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Going through the motions : the impacts of frequent fires and grazing pressure on reproduction of Montane grassland birds
… implicated as a cause for the decline of many grassland-nesting birds across the globe. While this effect has motivated extensive research and conservation in the developed northern hemisphere, it remains poorly addressed in southern hemisphere. Between 1998 and 2001 I examined the effect of …
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Evaluation Of Selected Spectral Vegetation Indices In Senescent Rangeland Canopy Using Landsat Imagery
<p>Grassland birds are diminishing more steadily and rapidly than other North American birds in general. The nesting success of some grassland bird species depends on the amount of nonproductive vegetation (NPV). To estimate NPV land managers are currently using the Robel pole visual obstruction …
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A Comparison of Land Use and Land Cover in Public Lands of the Northwestern Great Plains and High Plains Ecoregions and the Implications For Grassland Birds
<p>Loss and degradation of grassland habitat are driving forces that contribute to widespread declines of grassland birds in the United States. Many studies have evaluated habitat needs for the conservation of grassland birds, but the relative contribution of public lands in representing and …
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A population study and management suggestions for the Denslow's Sparrow (Ammodramus henslowii) at Fort, Drum, NY
… henslowii) is one of the most threatened grassland bird species in North America. It is listed as endangered, threatened, or a species of concern in 30 of 32 states and one Canadian province in its historic range. This obligate grassland breeding bird species is now clustered in smaller …
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Effects of Management Practices on Grassland Plant and Bird Community Composition in Kane County Forest Preserves
<p>Loss of grassland ecosystems over the past century has increased importance of efforts to improve and restore habitat for native plant species and the biotic communities they support. As a result of these efforts, biotic and abiotic conditions and interactions with the environment are altered. …
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Avian Occurrence in Woodlands and Grasslands on Public Areas Throughout Eastern South Dakota
… purpose of this study was to inventory nongame bird species on public lands throughout eastern South Dakota in woodland and grassland habitats of different patch sizes and landscape matrices in various physiographic regions. Nongame birds were surveyed in 524 (99 native and 425 planted) woodland …
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Conversion of Exotic Cool-Season Grasslands to Restored Native Plant Communities Utilizing Herbicide Treatments
… native grasses. Vegetative characteristics and grassland bird use of conservation plantings were studied in eastern South Dakota Game Production Areas, June 2007-2008. Fourteen fields, from one to eight years old at the onset of the study, were surveyed in each year to describe vegetative …
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