Download or read book Habitat Preference and Management Strategies for Grassland Birds on the Wallkill River National Windlife Refuge New Jersey written by Lamar B. Gore and published by . This book was released on 1999 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Use Nest Success and Management Recommendations for Grassland Birds of the Canaan Valley National Wildlife Refuge West Virginia written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Habitat based Approach to Management of Tallgrass Prairies at the Tewaukon National Wildlife Refuge written by Richard L. Schroeder and published by . This book was released on 1999 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: National Wildlife Refuges are required to manage habitat in accord with an approved Comprehensive Conservation Plan containing specific measureable habitat objectives. Tallgrass pririe habitat is of critical concern at the Tewaukon National Wildlife Refuge. Habitat management directed at improving conditions for declining bird species, rare butterflies, and a diversity of tallgrass flora is assumed to contribute substantially toward the broad goal of maintaining native biodiversity in tallgrass priries. Such management should consider the size of tallgrass patches, the amount of woody vegetation, providing a mosaic of vegetation heights, and improving overall floristic quality. Selection of appropriate management strategies followed by monitoring and evaluation of habitat conditions will allow for adaptive management and appropriate modifications over time.
Download or read book Nongame Migratory Bird Habitat Conservation Strategy Plan written by and published by . This book was released on 1992 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Birdscapes written by and published by . This book was released on 2003 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Conservation of Grassland Birds written by Paul D. Goriup and published by International. This book was released on 1988 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wetland Birds written by Milton W. Weller and published by Cambridge University Press. This book was released on 1999-02-18 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Readable and practical account of wetland bird ecology and conservation.
Download or read book Habitat Selection in Birds written by Martin L. Cody and published by Academic Press. This book was released on 1985-06-28 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading researchers in behavioural ecology discuss specific aspects of this important topic including: The mechanism of habitat selection and how it operates Its relevance to population biology Behavioural and physiological implications The ecological and evolutionary significance of habitat choice and survival and reproduction in various habitat types.
Download or read book Ecology and Conservation of Grassland Birds of the Western Hemisphere written by Peter D. Vickery and published by . This book was released on 1999 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bird habitat Relationships as a Guide to Ecologically based Management at Floyd Bennett Field Gateway National Recreation Area Final Report Prepared for the New York City Audubon Society in Cooperation with Gateway National Recreation Area National Park Service written by Richard A. Lent and published by . This book was released on 1989 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Landscape Characteristics Affecting Grassland Birds on Fields Enrolled in the Conservation Reserve Program written by Mary Ann Cunningham and published by . This book was released on 2001 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Restored Heterogeneity as a Conservation Strategy for Grassland Birds written by Torre James Hovick and published by . This book was released on 2014 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grasslands are inherently dynamic in space and time evolving with frequent disturbance from fire and herbivores. Throughout much of the world, grasslands have been converted and fragmented and many remaining grasslands have become homogenous as a consequence of human actions. As a result, ecosystem function has declined and biodiversity loss has led to decreased ecological services. Of particular concern are highly imperiled grassland birds which have experienced greater population declines than any other habitat associated guild of birds in North America. Conservation efforts that restore heterogeneity to grasslands through the re-coupling of fire and grazing may be an effective strategy for stabilizing or increasing grassland bird populations. We examined Greater Prairie-Chicken (Tympanuchus cupido) ecology, breeding bird community diversity and stability, and non-breeding bird community diversity and patch occupancy in tallgrass prairie with restored structural and compositional heterogeneity. We found that Greater Prairie-Chickens selected for patches with greater time since fire and grazing and that taller vegetation increased nest survival. Additionally, nests that survived were in cooler environments and prairie-chickens displayed fine scale thermal habitat selection as nest sites were nearly 4°C cooler than micro-sites within 2 meters of nests. We found that heterogeneity increased breeding bird community diversity and that increased heterogeneity resulted in greater community stability over time. Finally, non-breeding bird community diversity increased as a result of structural heterogeneity and occupancy modeling revealed that certain species selected for varying patches along a disturbance gradient (i.e, recently disturbed to relatively undisturbed) that resulted from fire and grazing dependent heterogeneity. Our findings add to a growing body of literature supporting the use of fire and grazing to create a shifting grassland mosaic that increases vegetation structural and compositional heterogeneity and maximizes native biodiversity within rangeland ecosystems through the conservation of natural patterns and processes. Additionally, these data provide evidence that variation in grassland structure resulting from the fire-grazing interaction may be important in moderating thermal environments and highlights the complex and interactive effects of restored ecological processes on ecosystems. We recommend future management efforts in rangelands focus on restored disturbance process to increase heterogeneity and improve grassland bird conservation.
Download or read book Demographic Responses of Grassland Songbirds to Rangeland Management in the Tallgrass Prairie written by Bram Hendrik Ferdinand Verheijen and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Grasslands are among the most rapidly declining ecosystems in the world. The Flint Hills ecoregion contains one of the largest remaining tracts of tallgrass prairie, but most of the area is managed with high densities of grazing animals and frequent prescribed burns, thereby reducing variation in vegetative structure. A homogeneous landscape leads to lower diversity and abundance of wildlife species, including grassland songbirds. Patch-burn grazing management has been proposed to more closely match the historical interaction between fire and selective grazing by native ungulates. Pastures managed with patch-burn grazing have a greater variety of vegetative structure and plant species composition, and as a result, higher species diversity, abundance, and reproductive success of grassland birds. However, past work has not considered potential effects of regional variation in predation risk and rates of brood parasitism by Brown-headed Cowbirds (Molothrus ater), or annual variation in climatic conditions on the effects of patch-burn grazing management on the reproductive success of grassland songbirds. Over a six year period and at two tallgrass prairie sites, I tested the effects of patch-burn grazing on the reproductive success of three native grassland songbird species, Dickcissels (Spiza americana), Eastern Meadowlarks (Sturnella magna), and Grasshopper Sparrows (Ammodramus savannarum), as well as subsequent effects on the space use, movements, and survival of fledgling Dickcissels. I found only minor effects of patch-burn grazing on the reproductive success of grassland songbirds, supporting previous studies that show that patch-burn grazing does not have negative effects on demographic rates of grassland songbirds. Management regime did not affect densities or territory size of male Dickcissels, but bird densities tended to be higher and territories tended to be smaller on patches within the patch-burn grazing treatment that were burned in the previous year. Thus, patch-burn grazing management might benefit Dickcissel populations by providing higher quality breeding habitat in unburned patches. Last, I found evidence for a potential tradeoff between habitat selection for nests vs. fledglings of Dickcissels in some rangeland management strategies. Parents that realized high reproductive success by nesting in pastures with lower cowbird densities, produced fledglings that faced high rates of depredation by snakes and showed greater movements away from those pastures. Survival rates and movements of Dickcissel fledglings were low, especially during the first week after leaving the nest, which stresses the importance of local habitat conditions. At a larger spatial scale, I tested whether regional differences in habitat structure could drive variation in apparent survival of grassland songbirds. I found that grassland- and shrubland-breeding species had higher estimates of apparent survival than forest-breeding species, contrary to the prevailing viewpoint that birds breeding in dynamic landscapes, such as frequently burned grasslands, should show lower apparent survival than species that breed in woody habitats. The results of my field study show that restoring the historical interaction between fire and grazing on the landscape via patch-burn grazing management could benefit grassland songbirds. Moreover, my dissertation is the first study that tests the effects of patch-burn grazing management on the survival and movements of fledgling Dickcissels, and shows that high cowbird densities can cause a tradeoff between different life-stages. Future conservation efforts should take into account regional variation in species abundance, predator community composition and abundance of Brown-headed Cowbirds when assessing the effects of rangeland management on the demography of grassland songbirds.
Download or read book Passerine Communities and Bird habitat Relationships on Prescribe burned Mixed Grass Prairie in North Dakota written by Elizabeth Marie Madden and published by . This book was released on 1996 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: To more effectively manage remaining native grasslands and declining populations of prairie passerine birds, linkages between disturbance regimes, vegetation, and bird abundance need to be more fully understood. Therefore I examined bird-habitat relationships on northern mixed-grass prairie at Lostwood National Wildlife Refuge in northwestern North Dakota, where prescribed fire has been used as a habitat management tool since the 1970's. I sampled bird abundance on upland prairie at 310 point count locations during 1993 and 1994 breeding seasons. I then measured vegetation structure and composition at each location. Complete fire histories were available for each point, with over 80% being burned 1 to 4 times in the last 15 years. Striking differences in bird species abundance were apparent among areas with different fire histories. Baird's, grasshopper, and Le Conte's sparrows,Sprague's pipits, bobolinks, and western meadowlarks were absent from unburned prairie, but were among the.
Download or read book Effects of Habitat Restoration on Breeding Grassland Songbird Habitat Use in Remnant Prairies of the Loess Hills Iowa written by Tracy A. Walker and published by . This book was released on 2005 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the central US, land use change has resulted in the loss and fragmentation of grassland habitats. We examined the influence of different restoration practices (burning and grazing, both separately and in combination) on native plants and grassland birds within the Loess Hills, Iowa at Broken Kettle Grasslands (BKG) Preserve in 2003-04. Vegetation characteristics varied significantly with treatment. Burned-only plots had more native plant species and a higher percentage of bare ground compared to other treatments, while grazed plots tended to have fewer shrubs, higher litter depth, and greater litter cover. Bird response to habitat restoration varied with treatment and species life history traits. Obligate grassland species, such as Grasshopper Sparrows (Ammodramus savannarum) and Western Meadowlarks (Sturnella neglecta), were consistently less abundant in burned-only treatments. In contrast, Dickcissels (Spiza americana), showed no difference among treatments, and woodland edge species, such as Lark Sparrows (Chondestes grammacus), were more abundant in these areas. Grasshopper Sparrows selected nest sites with short vegetation and a shallow litter layer, whereas Dickcissels selected nesting habitat closer to and with a higher percentage of tall shrubs. Patterns in nest success and seasonal productivity were opposite those shown in relative abundance. Grasshopper Sparrows preferred to nest in habitat that had been grazed, yet nest success and seasonal productivity were highest in burned-only treatments. These results suggest that grazing may have a negative effect on grassland bird populations at BKG. Consequently, we recommend a restoration approach that includes both burning and grazing, considering timing and distribution of grazing regimes, for sustaining populations of threatened grassland bird species with varying habitat preferences.
Download or read book Habitat Selection and Breeding Ecology of Grassland Birds in Areas Managed with Fire and Grazing written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aspects of Habitat Selection in Grassland Birds written by Keith Graham Harrison and published by . This book was released on 1974 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
