Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Neotropical migratory breeding bird communities in riparian forests of different widths along the Altamaha River, Georgia Neotropical migratory breeding bird communities in riparian forests of different widths along the Altamaha River, Georgia
-We surveyed riparian forest corridors of different widths along the lower Altamaha River in Georgia in 1993 and 1994 to investigate the relationship between forest corridor width and Neotropical breeding bird community diversity and abundance. Species richness and abundance of three of six focal species increased with increasing forest corridor width. We suggest if Neotropical breeding...
Authors
M.F. Hodges, D.G. Krementz
Trail degradation as influenced by environmental factors: A state-of-the-knowledge review Trail degradation as influenced by environmental factors: A state-of-the-knowledge review
Excerpt: Human use and misuse of land has been causing extensive degradation of the very natural resources on which we depend. National parks, wilderness and other protected natural or semi-natural areas (referred to as natural areas hereafter) represent efforts to preserve our natural heritage from further exploitation. Such areas also provide outstanding recreational, research, and...
Authors
Y.-F. Leung, J. L. Marion
Malocclusion in the jaws of captive bred Arctic wolves Malocclusion in the jaws of captive bred Arctic wolves
Similar abnormalities in the skulls of captive Arctic Wolves (Canis lupus arctos) and a wild Arctic wolf found dead on Ellesmere Island, Canada, in 1986 are described. The malocclusion is likely to be recessively inherited and would be expressed more frequently in association with increased levels of inbreeding. A re-shaping of the skulls may have occurred due to the effects of the...
Authors
N.E. Federoff
A three-dimensional method-of-characteristics solute-transport model (MOC3D) A three-dimensional method-of-characteristics solute-transport model (MOC3D)
This report presents a model, MOC3D, that simulates three-dimensional solute transport in flowing ground water. The model computes changes in concentration of a single dissolved chemical constituent over time that are caused by advective transport, hydrodynamic dispersion (including both mechanical dispersion and diffusion), mixing (or dilution) from fluid sources, and mathematically...
Authors
Leonard F. Konikow, D.J. Goode, G.Z. Hornberger
Measuring and monitoring biological diversity: Standard methods for mammals Measuring and monitoring biological diversity: Standard methods for mammals
Measuring and Monitoring Biological Diversity: Standard Methods for Mammals provides a comprehensive manual for designing and implementing inventories of mammalian biodiversity anywhere in the world and for any group, from rodents to open-country grazers. The book emphasizes formal estimation approaches, which supply data that can be compared across habitats and over time. Beginning with...
Egg and semen production Egg and semen production
No abstract available.
Authors
C.M. Mirande, G.F. Gee, A. Burke, P. Whitlock
U. S. Geological Survey programs in Pennsylvania U. S. Geological Survey programs in Pennsylvania
The U.S. Geological Survey (USGS) is involved in mapping and studying land, mineral, biological, and water resources and determining the risk from earthquakes and other natural hazards, which are of importance to the citizens of Pennsylvania. This Fact Sheet describes how the USGS is addressing some of the major environmental issues in Pennsylvania, which include availability of mineral...
Authors
Water Resources Division U.S. Geological Survey
Maps of difference between ground-water contributions to base flow for the various recurrence intervals and ground-water withdrawals in the Neshaminy Creek basin, Pennsylvania Maps of difference between ground-water contributions to base flow for the various recurrence intervals and ground-water withdrawals in the Neshaminy Creek basin, Pennsylvania
No abstract available.
Authors
C.L. Schreffler, P.H. Bird
Henslow's sparrow, Ammodramus henslowii Henslow's sparrow, Ammodramus henslowii
No abstract available.
Authors
D.D. Boone, B.A. Dowell
Diurnal raptors in the fragmented rain forest of the Sierra Imataca, Venezuela Diurnal raptors in the fragmented rain forest of the Sierra Imataca, Venezuela
The rain forest of the Sierra Imataca in eastern Venezuela has been subjected to extensive deforestation for pastures and agricultural settlements. In the last decade the opening of access roads combined with intensified logging and mining activities have fragmented a significant portion of the remaining forest. We noted local distribution and habitat use for 42 species of diurnal...
Authors
E. Alvarez, D. H. Ellis, D.G. Smith, C.T. LaRue
Designing a study to assess mammalian diversity Designing a study to assess mammalian diversity
No abstract available.
Authors
M.J. Conroy, J.D. Nichols