A5032590362- Rangeland and Wildlife Management
- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Marine Bivalve and Aquaculture Studies
- Cephalopods and Marine Biology
- Fire effects on ecosystems
- Marine and coastal plant biology
- Crustacean biology and ecology
- Plant and animal studies
- Lichen and fungal ecology
- Aquatic Invertebrate Ecology and Behavior
- Survey Sampling and Estimation Techniques
- Animal Vocal Communication and Behavior
- Isotope Analysis in Ecology
- Marine animal studies overview
- Animal and Plant Science Education
- Amphibian and Reptile Biology
- Tropical and Extratropical Cyclones Research
- Archaeology and Natural History
- Botany, Ecology, and Taxonomy Studies
- Marine Biology and Ecology Research
- Marine Biology and Environmental Chemistry
State University of New York
2000-2009
York University
2004-2009
SUNY College of Environmental Science and Forestry
2000-2009
Cornell University
2009
University of Missouri
1999-2003
United States Geological Survey
2000
Northern Prairie Wildlife Research Center
2000
University of West Florida
1981-1985
Abstract: Between 1995 and 1997, we studied breeding birds in fragments of native tallgrass prairie southwestern Missouri to determine the effect habitat fragmentation on grassland bird populations. Data density nesting success collected 13 various sizes revealed three levels area sensitivity. The most area‐sensitive species, Greater Prairie‐Chicken ( Tympanuchus cupido ), was absent from small fragments. An intermediate form sensitivity apparent only one Henslow's Sparrow Ammodramus...
Abstract: Grassland fragmentation and habitat loss are hypothesized to be contributing widespread grassland bird declines in North America due the adverse effects of on breeding abundance reproductive success. To assess success birds, we measured rates nest predation brood parasitism for four species birds ( Grasshopper Sparrow [ Ammodramus savannaru ], Henslow's Sparrow[ henslowii Eastern Meadowlark Sturnella magna Dickcissel Spiza Americana ] ) 39 prairie fragments ranging from 24...
We tested how edges affect nest survival and predator distribution in a native tallgrass prairie system southwestern Missouri using artificial nests, natural nests of Dickcissels (Spiza americana) Henslow's Sparrows (Ammodramus henslowii), mammal track stations. Survival was lower within 30 m forest edge. Nesting success 50 to shrubby edge than at greater distances, whereas fates were not related distances roads, agricultural fields, or forests. Evidence from clay eggs placed indicated that...
Current management recommendations for grassland birds in North America emphasize providing large patches of habitat within landscapes that have few forest or shrubland areas. These Bird Conservation Areas are being proposed under the assumption treeless will maintain viable populations birds. This requires patch size and landscape features affect density nesting success birds, these effects consistent among years regions across focal species. However, assumptions not yet been validated...
The structure of vegetation in grassland systems, unlike that forest varies dramatically among years on the same sites, and regions with similar vegetation. role this variation bird density nesting success birds is poorly understood, primarily because few studies have included sufficiently large temporal spatial scales to capture structure, density, or success. To date, no large-scale study has been conducted investigate whether respond similarly changes structure. However, reliable...
Abstract We tested how edges affect nest survival and predator distribution in a native tallgrass prairie system southwestern Missouri using artificial nests, natural nests of Dickcissels (Spiza americana) Henslow's Sparrows (Ammodramus henslowii), mammal track stations. Survival was lower within 30 m forest edge. Nesting success 50 to shrubby edge than at greater distances, whereas fates were not related distances roads, agricultural fields, or forests. Evidence from clay eggs placed...
Basic nesting information on grassland passerines is needed for improving bird management. Among the needs are (1) suitability of habitat, (2) periods during breeding season in which birds most vulnerable to disturbances, and (3) how fit grasslands into a prioritization scheme conservation. Comparisons parameters among species will help identify important management considerations. We describe compare nest-site characteristics, phenology, clutch size, hatching fledging success, brood...
Woody vegetation has been linked to increased rates of Brown-headed Cowbird (Molothrus ater) parasitism for some grassland hosts. In northern North Dakota, however, studies reported that passerine nests was lower in landscapes with trees than those without trees. We looked evidence this pattern elsewhere, using data from two conducted on the Sheyenne National Grassland southeastern Dakota. Specifically, we examined probability relative percent tree cover within 2 km a nest. found negative...
Little is known about the breeding biology of Le Conte's Sparrow (Ammodramus leconteii), probably because its secretive nature. We provide new information on several aspects biology, including rates nest parasitism by Brown-headed Cowbirds (Molothrus ater) and potential factors affecting densities nesting success species. Our study was conducted in tallgrass prairie northwestern Minnesota southeastern North Dakota during 1998–2002. Breeding varied among years, but this variation not clearly...
We tested how edges affect nest survival and predator distribution in a native tallgrass prairie system southwestern Missouri using artificial nests, natural nests of Dickcissels (Spiza americana) Henslow's Sparrows (Ammodramus henslowii), mammal track stations. Survival was lower within 30 m forest edge. Nesting success 50 to shrubby edge than at greater distances, whereas fates were not related distances roads, agricultural fields, or forests. Evidence from clay eggs placed indicated that...
Larger birds are generally more strongly affected by habitat loss and fragmentation than smaller ones because they require resources thus larger patches. Consequently, conservation actions often favor the creation or protection of over However, in grassland systems boundaries between a patch surrounding landscape, perceived size patch, can be indistinct. We investigated whether eight bird species with different body sizes variation landscape structure consistent manner. Data were collected...
Each record of a bird on survey is the result three processes: (1) being physically present, (2) this making itself available for detection, given that it and (3) detected has made detection. We employ novel approach to examine variation in availability detection endangered Florida Grasshopper Sparrow (Ammodramus savannarum floridanus). Analyzing multi-day acoustic recordings, we quantified effects four sources probability singing: consistent among birds, day-to-day was from individual...
Abstract Larger birds are generally more strongly affected by habitat loss and fragmentation than smaller ones because they require resources thus larger patches. Consequently, conservation actions often favor the creation or protection of over However, in grassland systems boundaries between a patch surrounding landscape, perceived size patch, can be indistinct. We investigated whether eight bird species with different body sizes variation landscape structure consistent manner. Data were...
The shell movements of bay scallops (Argopecten irradlans) were electronically monitored before and after different amounts whole drilling mud, barite, lignosulfonate, calcium carbonate added to their tanks. Movements compared with those made by exposed seawater for the same duration using six response measures. For a graded dose-response relationship existed two measures: change In number major Rapid Valve Closures (RVCs) cumulative magnitude all RVCs. Ejection pseudofeces Is frequently...