Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Estimates of population change in selected species of tropical birds using mark-recapture data Estimates of population change in selected species of tropical birds using mark-recapture data
The population biology of tropical birds is known for a only small sample of species; especially in the Neotropics. Robust estimates of parameters such as survival rate and finite rate of population change (A) are crucial for conservation purposes and useful for studies of avian life histories. We used methods developed by Pradel (1996, Biometrics 52:703-709) to estimate A for 10 species...
Authors
J. Brawn, J.D. Nichols, J.E. Hines, J. Nesbitt
A new national mosaic of state landcover data A new national mosaic of state landcover data
This presentation reviewed current landcover mapping efforts and presented a new preliminary, national mosaic of Gap Analysis Program (GAP) and Multi-Resolution Land Characteristics Consortium (MRLC) landcover data with a discussion of techniques, problems faced, and future refinements.
Authors
I. Thomas
Studying wildlife at local and landscape scales: Bachman's Sparrows at the Savannah River Site Studying wildlife at local and landscape scales: Bachman's Sparrows at the Savannah River Site
In the late 1980s and early 1990s, mutual research interests between land managers at the Savannah River Site and biologists at the University of Georgia resulted in a landscape-ecology study of the Bachman's Sparrow (Aimophila aestivalis). This species had been declining throughout its range for several decades and was considered a species of management concern by the U.S. Forest...
Authors
J.B. Dunning, B.J. Danielson, B.D. Watts, L. Liu, D.G. Krementz
Breeding Common Terns in the Greater West Indies: status and conservation priorities Breeding Common Terns in the Greater West Indies: status and conservation priorities
No abstract available.
Authors
P. A. Buckley, F. G. Buckley
Contaminant effect endpoints in terrestrial vertebrates at and above the individual level Contaminant effect endpoints in terrestrial vertebrates at and above the individual level
Use of biochemical, physiological, anatomical, reproductive and behavioral characteristics of wild terrestrial vertebrates to assess contaminant exposure and effects has become commonplace over the past 3 decades. At the level of the individual organism, response patterns have been associated with and sometimes causally linked to contaminant exposure. However, such responses at the...
Authors
Barnett A. Rattner, J.B. Cohen, N. H. Golden
Recreation impacts and management in wilderness: A state-of-knowledge review Recreation impacts and management in wilderness: A state-of-knowledge review
This paper reviews the body of literature on recreation resource impacts and their management in the United States, with a primary focus on research within designated wildernesses during the past 15 years since the previous review (Cole 1987b). Recreation impacts have become a salient issue among wilderness scientists, managers and advocates alike. Studies of recreation impacts, referred...
Authors
Y.-F. Leung, J. L. Marion
Landscape associations of frog and toad species in Iowa and Wisconsin, U.S.A Landscape associations of frog and toad species in Iowa and Wisconsin, U.S.A
Landscape habitat associations of frogs and toads in Iowa and Wisconsin were tested to determine whether they support or refute previous general habitat classifications. We examined which Midwestern species shared similar habitats to see if these associations were consistent across large geographic areas (states). Rana sylvatica (wood frog), Hyla versicolor (eastern gray treefrog)...
Authors
M. G. Knutson, J.R. Sauer, D.A. Olsen, M.J. Mossman, L.M. Hemesath, M.J. Lannoo
Research and information needs for heron conservation Research and information needs for heron conservation
No abstract available.
Authors
J.A. Kushlan
Heron feeding habitat conservation Heron feeding habitat conservation
No abstract available.
Authors
J.A. Kushlan
Managing wetlands for waterbirds: How managers can make a difference in improving habitat to support a North American Bird Conservation Plan Managing wetlands for waterbirds: How managers can make a difference in improving habitat to support a North American Bird Conservation Plan
Wetlands are the most productive ecosystems in the world, yet they have suffered more loss and degradation than any other ecosystem. Not surprisingly, 50% (29 of 58) of all the bird species in the U. S. (excluding Hawaii and territories) that are listed either as federally threatened or endangered, or are on the U. S. Fish & Wildlife Service 1995 List of Migratory Nongame Birds of...
Authors
R.M. Erwin, M.K. Laubhan, J.E. Cornely, D.M. Bradshaw
Grassland birds: An overview of threats and recommended management strategies Grassland birds: An overview of threats and recommended management strategies
Grassland ecosystems are dependent on periodic disturbance for habitat maintenance. Historically, grazing by native herbivores and prairie fires were the agents principally responsible for maintaining grassland areas. However, elimination of native herbivores, wide-spread fire suppression, and conversion for agriculture have greatly altered grasslands in the United States and Canada...
Authors
P.D. Vickery, J.R. Herkert, F.L. Knopf, J. Ruth, C.E. Keller