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Articles 1 - 30 of 134
Full-Text Articles in Entire DC Network
The Savannah River Site: Site Description, Land Use And Management History, David L. White, Karen F. Gaines
The Savannah River Site: Site Description, Land Use And Management History, David L. White, Karen F. Gaines
Publications
The 78,000-ha Savannah River Site, which is located in the upper Coastal Plain of South Carolina along the Savannah River, was established as a nuclear production facility in 1951 by the Atomic Energy Commission. The site’s physical and vegetative characteristics, land use history, and the impacts of management and operations are described. Aboriginal and early European settlement was primarily along streams, where much of the farming and timber cutting have occurred. Woodland grazing occurred in the uplands and lowlands. Land use intensity increased after the Civil War and peaked in the 1920s. Impacts from production of cotton and corn, naval …
A Retrospective Assessment Of Primary Productivity On The Bering And Chukchi Sea Shelves Using Stable Isotope Ratios In Seabirds, Grace Elizabeth Abromaitis
A Retrospective Assessment Of Primary Productivity On The Bering And Chukchi Sea Shelves Using Stable Isotope Ratios In Seabirds, Grace Elizabeth Abromaitis
Marine Biology
Recent declines of marine mammal seabird populations in the Bering Sea have raised the question of whether the changes are caused by fishing pressure or a decrease in ecosystem carrying capacity. Stable carbon (¹³C⁾ and nitrogen (¹⁵N⁾ isotope ratios in Thick⁻billed Murre muscle and feathers were used as indicators of changing seasonal primary production. ¹³C values in phytoplankton vary directly with growth rates and are passed up the food web to consumers. Muscle and feather ¹³C values decreased over the period 1976-1998 suggesting a decline in Bering/Chukchi continental shelf primary production. Carbon isotope ratios in murres were correlated with bowhead …
A Comparison Of Sockeye Salmon (Oncorhynchus Nerka) In Two Climate Regimes In The North Pacific Ocean Using Stable Carbon And Nitrogren Isotope Ratios, Franklin Robert Satterfield
A Comparison Of Sockeye Salmon (Oncorhynchus Nerka) In Two Climate Regimes In The North Pacific Ocean Using Stable Carbon And Nitrogren Isotope Ratios, Franklin Robert Satterfield
Marine Biology
This study explores how the climate shift in the late 1970's impacted sockeye salmon feeding. Stable isotope ratios (¹³C and ¹⁵N) of recent muscle and scale tissues from five mature salmon species are highly correlated (R²=0.96 and 0.91, respectively), validating the use of archived scales for retrospective analysis. These data suggest a trophic separation by species with chinook occupying the highest level, followed by coho with some degree of overlap among sockeye, pink and chum at the lowest level. Archived scales from four different sockeye stocks from Kodiak Island and Southeast region were analyzed over the last 34 years to …
Survival And Brood Rearing Ecology Of Emperor Geese, Joel A. Schmutz
Survival And Brood Rearing Ecology Of Emperor Geese, Joel A. Schmutz
Biological Sciences
Emperor Geese (Chen canagica) breed on the Yukon-Kuskokwim Delta in an area inhabited by three other goose species. Whereas populations of other geese increased since the mid 1980s, Emperor Goose numbers remained low. Because survival and habitat selection by broods of Emeperor Geese had not been studied previously and numbers of predatory Glaucous Gulls (Larus hyperboreus) had recently increased, I studied brood rearing ecology of Emperor Geese during 1993-1996 to assess whether this seasonal period could be limiting population growth. Survival of goslings to 30 days varied among years from 0.32 to 0.70 and was primarily influenced by mortality during …
Palaeoecological Implications Of Archaeological Seal Bone Assemblages: Case Studies From Labrador And Baffin Island, James M. Woollett, Anne S. Henshaw, Cameron P. Wake
Palaeoecological Implications Of Archaeological Seal Bone Assemblages: Case Studies From Labrador And Baffin Island, James M. Woollett, Anne S. Henshaw, Cameron P. Wake
Earth Sciences
. In recent years, increasing scientific attention has been paid to sea mammals as biological indicators of Arctic environmental change. The usefulness of animals such as ringed seal (Phoca hispida), harp seal (Phoca groenlandica), bearded seal (Erignathus barbatus), and harbour seal (Phoca vitulina) as indicator species is due to the close relationship of their range, reproductive cycles, and life histories to sea ice. The behaviour and distribution of these species correlate with ice conditions in the areas where the animals are encountered. The proportions of seal species represented in archaeological deposits may therefore reflect, at least in part, environmental conditions …
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter
The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.
A Spatial Inquiry Of Infant Low Birthweight And Cancer Mortality In East Baton Rouge Parish, Louisiana, Esra Qzdenerol
A Spatial Inquiry Of Infant Low Birthweight And Cancer Mortality In East Baton Rouge Parish, Louisiana, Esra Qzdenerol
LSU Historical Dissertations and Theses
Infant low birthweight rate in East Baton Rouge Parish is higher compared to the nation. Cancer is one of the most serious health problems in Louisiana. A few studies have indicated a relationship between the two health outcomes and their environment, but conclusions from these studies have not always been consistent. The spatial and temporal scales of the data and the methods used in these studies contribute to the inconsistent and uncertain results. The spatial patterns of infant low birthweight and cancer mortality in East Baton Rouge Parish from 1993 to 1996 and their relationships with environmental factors at three …
The Vascular Flora Of Prentice Cooper State Forest And Wildlife Management Area, Tennessee, John Trevor Beck
The Vascular Flora Of Prentice Cooper State Forest And Wildlife Management Area, Tennessee, John Trevor Beck
Masters Theses and Doctoral Dissertations
The vascular plants of Tennessee's Prentice Cooper State Forest and Wildlife Management Area were gathered from 112 collection trips made during the growing seasons of 1998 and 1999. Prentice Cooper has an interesting and a rich flora. I collected 2,313 specimens and examined 110 herbarium specimens. The flora is comprised of 139 families, 512 genera, and 1,038 species and lesser taxa. The four largest families are Asteraceae (128 species-12% of the flora), Poaceae (106 species-10%), Cyperaceae (64 species-6%), and Fabaceae (57 species-5%). These four families represent approximately 34% of the total flora. Numerous county extensions, as well as rare, threatened, …
Microbial Biofilms: From Ecology To Molecular Genetics, Mary Ellen Davey, George A. O'Toole
Microbial Biofilms: From Ecology To Molecular Genetics, Mary Ellen Davey, George A. O'Toole
Dartmouth Scholarship
Biofilms are complex communities of microorganisms attached to surfaces or associated with interfaces. Despite the focus of modern microbiology research on pure culture, planktonic (free-swimming) bacteria, it is now widely recognized that most bacteria found in natural, clinical, and industrial settings persist in association with surfaces. Furthermore, these microbial communities are often composed of multiple species that interact with each other and their environment. The determination of biofilm architecture, particularly the spatial arrangement of microcolonies (clusters of cells) relative to one another, has profound implications for the function of these complex communities. Numerous new experimental approaches and methodologies have been …
Univercity News (2000-11-06)
UniverCity News, 1998-2001
VCU Today, the University’s first official administrative organ, began as a somewhat irregular monthly publication but moved to a bi-weekly newspaper format in the 1980s. The newspaper changed its name to VCU Voice in 1988 and ten years later it appeared under the title UniverCity News. As it neared the end of its run as a physical newspaper, the publication became simply VCU News. These four publications were essentially the same periodical published under different titles by the Office of University Relations. VCU News appeared online for the first time in 2002.
Obituary: Elmer Clea Birney, 1940-2000, Hugh H. Genoways, Carleton J. Phillips, Jerry R. Choate, Robert S. Sikes, Kristin M. Kramer
Obituary: Elmer Clea Birney, 1940-2000, Hugh H. Genoways, Carleton J. Phillips, Jerry R. Choate, Robert S. Sikes, Kristin M. Kramer
University of Nebraska State Museum: Mammalogy Papers
On 11 June 2000, Dr. Elmer C. Birney unexpectedly passed away from cardiac arrest suffered while outside caring for his cattle at his home in Blaine, Minnesota. One of his former students, Robert Timm, probably best expressed the immediate reaction of his family and many friends: ‘‘He was too young and in too good of health to be gone so soon.’’ At the time of his death, Elmer was Professor in the Department of Ecology, Evolution and Behavior, the Curator of Mammals at the Bell Museum of Natural History, and Director of Graduate Studies of the program in Ecology, Evolution …
The Breeding Ecology Of White-Faced Ibis In The Lower Carson River Basin, Nevada, Eric Patrick Kelchlin
The Breeding Ecology Of White-Faced Ibis In The Lower Carson River Basin, Nevada, Eric Patrick Kelchlin
LSU Historical Dissertations and Theses
The Great Basin White-faced Ibis (Plegadis chihi) population is recognized as a Species of Management because of its small population size, limited number of traditional breeding sites, and vulnerability to habitat loss. The ability to predict future population trends and develop wetland management strategies is limited because many aspects of their breeding ecology and population dynamics are unknown. 1 examined White-faced Ibis nesting ecology and breeding habitat selection at the Lower Carson River Basin, Nevada, from 1995-1997, and the relationship between the local surface water conditions and trends in the number of breeding pairs from 1970-1997 on a local and …
Wildlife Damage In The Suburbs: Conflicts In A Human-Wildlife Landscape, Rebecca Field
Wildlife Damage In The Suburbs: Conflicts In A Human-Wildlife Landscape, Rebecca Field
Wildlife Damage Management Conference
The sprawling communities surrounding cities pose a paradox for wildlife. Suburban habitat, with parks, greenways, and planned open spaces, provide attractive habitat with abundant resources for some wildlife species. Yet the landscape is dominated by human activities and disturbances. Species with little tolerance for human disturbance and habitat changes have difficulty maintaining their populations in suburban environments. Yet more adaptable species flourish in suburban areas where there are less predators, increased food resources, and abundant habitat for cover and raising young. The resulting overabundant wildlife populations pose increasing problems for biologists, wildlife damage practitioners, and the public. Management of urban …
The Use Of Border Collies In Avian And Wildlife Control Programs, Nicholas B. Carter
The Use Of Border Collies In Avian And Wildlife Control Programs, Nicholas B. Carter
Wildlife Damage Management Conference
Airports attract large numbers of wildlife primarily because they offer immense tracts of foraging and nesting habitats free from the threat of predation. Border collies can serve as an effective means of wildlife control in these environments by introducing a predator into the ecosystem. Many wildlife dispersal methods seek to imitate predators or the effect of predators and become increasingly ineffective as wildlife habituate to the stimuli. However, border collies are true predators, representing an actual, not perceived, threat to wildlife thereby eliminating the problems of habituation. Six airports and military bases have initiated use of border collies at their …
The Use Of Border Collies In Avian And Wildlife Control Programs, Nicholas B. Carter
The Use Of Border Collies In Avian And Wildlife Control Programs, Nicholas B. Carter
Wildlife Damage Management Conference Proceedings
Airports attract large numbers of wildlife primarily because they offer immense tracts of foraging and nesting habitats free from the threat of predation. Border collies can serve as an effective means of wildlife control in these environments by introducing a predator into the ecosystem. Many wildlife dispersal methods seek to imitate predators or the effect of predators and become increasingly ineffective as wildlife habituate to the stimuli. However, border collies are true predators, representing an actual, not perceived, threat to wildlife thereby eliminating the problems of habituation. Six airports and military bases have initiated use of border collies at their …
Wildlife Damage In The Suburbs: Conflicts In A Human-Wildlife Landscape, Rebecca Field
Wildlife Damage In The Suburbs: Conflicts In A Human-Wildlife Landscape, Rebecca Field
Wildlife Damage Management Conference Proceedings
The sprawling communities surrounding cities pose a paradox for wildlife. Suburban habitat, with parks, greenways, and planned open spaces, provide attractive habitat with abundant resources for some wildlife species. Yet the landscape is dominated by human activities and disturbances. Species with little tolerance for human disturbance and habitat changes have difficulty maintaining their populations in suburban environments. Yet more adaptable species flourish in suburban areas where there are less predators, increased food resources, and abundant habitat for cover and raising young. The resulting overabundant wildlife populations pose increasing problems for biologists, wildlife damage practitioners, and the public. Management of urban …
Management Guidelines For Sage Grouse And Sagebrush Ecosystems In Nevada, Bureau Of Land Management
Management Guidelines For Sage Grouse And Sagebrush Ecosystems In Nevada, Bureau Of Land Management
All U.S. Government Documents (Utah Regional Depository)
These management guidelines and supportive background information promote the conservation of sage grouse (Centrocercus urophasianus) and their sagebrush (Artemisia spp) habitats on Nevada public lands administered by Bureau of Land Management (BLM). The guidelines are intended to provide interim guidance to field managers, without restricting options currently being explored for regional, state, and local sage grouse/sagebrush conservation planning. The guidelines are a Nevada BLM, habitat-specific, adaptation of the recently updated, and soon to be finalized, Western Association of Wildlife Agencies (WAFWA) Draft Guidelines. The Nevada BLM guidelines apply the most current sage grouse science to BLM activities, within the context …
Fall 2000, Nsu Oceanographic Center
Montana Kaimin, September 13, 2000, Associated Students Of The University Of Montana
Montana Kaimin, September 13, 2000, Associated Students Of The University Of Montana
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
2000 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
2000 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
Grizzly Football Yearbook, 1939-2018
Annual yearbook of the University of Montana’s Athletics Department. This volume covers the period from fall 2000 through spring 2001.
The Public Trust Doctrine: Protector Of Pennsylvania's Public Natural Resources, Andrew H. Shaw
The Public Trust Doctrine: Protector Of Pennsylvania's Public Natural Resources, Andrew H. Shaw
Penn State Environmental Law Review (1991 - 2011)
No abstract provided.
Occurrence And Distribution Of Diverse Populations Of Magnetic Protists In A Chemically Stratified Coastal Salt Pond, Dennis A. Bazylinski, David R. Schlezinger, Brian H. Howes, Richard B. Frankel, Slava S. Epstein
Occurrence And Distribution Of Diverse Populations Of Magnetic Protists In A Chemically Stratified Coastal Salt Pond, Dennis A. Bazylinski, David R. Schlezinger, Brian H. Howes, Richard B. Frankel, Slava S. Epstein
Physics
Chemical stratification occurs in the water columns and sediments of many aquatic habitats resulting in vertical chemical and redox gradients. Various types of microorganisms are often associated with specific depths and chemical parameters in these situations. For example, magnetite-producing magnetotactic bacteria are known to form horizontal “plates” of cells at the oxic/anoxic transition zone (OATZ) of such environments. Here, we report the presence of populations of diverse magnetic protists in a seasonally chemically stratified, coastal salt pond. The protistan types included several biflagellates, a dinoflagellate, and a ciliate that were each associated with specific depths and thus, specific chemical, microbiological …
The Use Of Border Collies To Disperse Birds At Southwest Florida International Airport, Bobby D. O'Rick
The Use Of Border Collies To Disperse Birds At Southwest Florida International Airport, Bobby D. O'Rick
Bird Strike Committee-USA/Canada Joint Annual Meeting: 2nd (2000)
Similar to many airports throughout the United States and Canada, Southwest Florida International Airport (RSW) has a number of development features attractive to wildlife. Such features include stormwater detention ponds, large expanses of open fields, natural wetland marshes, and mature trees. In order to maintain safe operations and minimize the potential for wildlife-aircraft collisions, RSW has expanded the existing wildlife harassment program to include the use of a border collie. An Ecological Study completed by the United States Department of Agriculture (USDA) in 1997 indicated regular use of the airfield throughout the year by wading birds, waterfowl, and blackbirds. Although …
Proceedings Of 2nd Bird Strike Committee Usa/Canada Annual Meeting
Proceedings Of 2nd Bird Strike Committee Usa/Canada Annual Meeting
Bird Strike Committee-USA/Canada Joint Annual Meeting: 2nd (2000)
Proceedings of 2nd Bird Strike Committee USA/Canada Annual Meeting Abstracts
Cancer Surveillance Series: Non-Hodgkin’S Lymphoma Incidence By Histologic Subtype In The United States From 1978 Through 1995, Frank D. Groves, Martha S. Linet, Lois B. Travis, Susan S. Devesa
Cancer Surveillance Series: Non-Hodgkin’S Lymphoma Incidence By Histologic Subtype In The United States From 1978 Through 1995, Frank D. Groves, Martha S. Linet, Lois B. Travis, Susan S. Devesa
United States Public Health Resources
Background: Clinical investigations have shown prognostic heterogeneity within the non-Hodgkin’s lymphomas (NHLs) according to histology, but few descriptive studies have considered NHLs by subgroup. Our purpose is to assess the demographic patterns and any notable increases in population- based rates of different histologic subgroups of NHL.
Methods: Using data collected by the Surveillance, Epidemiology, and End Results Program of the National Cancer Institute, we calculated incidence rates for the major clinicopathologic categories of NHL by age, race, sex, geographic area, and time period.
Results: Among the 60 057 NHL cases diagnosed during the period from 1978 through 1995, total incidence …
Ard News August 2000
Agricultural Research Division: News and Annual Reports
CONTENTS:
Comments from the Dean
ARD Advisory Council Annual Report to Faculty
Natural Resouurces and Research Update
ARD Advisory Council Election Results
Anna Elliott Proposals
Sampson Range and Pasture Management Endowments
Sampson Range and Pasture Management Endowments
Widaman Trust Distinguished Graduate Assistant Award
Hardin Distinguished Graduate Fellowship for 2000-2001
National Research Initiative Report for 1999
Shear-Miles Fellowship 2000-2001
NRC Assessment of the National Research Initiative
USDA - ARS Research Leader Dr. Philip J. Schall
USDA Science and Education Impact Sheets
Congratulations to Faculty - Successful USDA Grant Proposals
Proposals Submitted for Federal Grants
New or Revised Projects
Grants and Contracts …
Nutrient Absorption And Utilization By Wing And Flight Muscle Morphs Of The Cricket Gryllus Firmus: Implications For The Trade-Off Between Flight Capability And Early Reproduction, Anthony J. Zera, Tammy Brink
Nutrient Absorption And Utilization By Wing And Flight Muscle Morphs Of The Cricket Gryllus Firmus: Implications For The Trade-Off Between Flight Capability And Early Reproduction, Anthony J. Zera, Tammy Brink
Anthony Zera Publications
Absorption efficiency (AD, approximate digestibility, assimilation efficiency) of various macronutrients and conversion of absorbed nutrients to biomass (ECD) were compared among the two types of flightless morph and the flight-capable morph of the cricket, Gryllus firmus. No biologically significant phenotypic or genetic difference in AD for carbohydrate, protein or lipid was observed among morphs fed either a high-nutrient (100%) or a low-nutrient (25%) diet. Thus, previously-documented differences among adult morphs in carbohydrate and lipid content must be caused by processes other than variation in nutrient absorption by morphs during adulthood. Relative absorption efficiency of total dry mass of food …
The Impact Of Lianas On Tree Regeneration In Tropical Forest Canopy Gaps: Evidence For An Alternative Pathway Of Gap‐Phase Regeneration, Stefan A. Schnitzer, James W. Dalling, Walter P. Carson
The Impact Of Lianas On Tree Regeneration In Tropical Forest Canopy Gaps: Evidence For An Alternative Pathway Of Gap‐Phase Regeneration, Stefan A. Schnitzer, James W. Dalling, Walter P. Carson
Biological Sciences Faculty Research and Publications
1 Regeneration in forest canopy gaps is thought to lead invariably to the rapid recruitment and growth of trees and the redevelopment of the canopy. Our observations, however, suggest that an alternate successional pathway is also likely, whereby gap‐phase regeneration is dominated by lianas and stalled in a low‐canopy state for many years. We investigated gap‐phase regeneration in an old‐growth tropical forest on Barro Colorado Island (BCI) in Panama to test the following two hypotheses: (i) many gaps follow a pathway in which they remain at a low canopy height and are dominated by lianas and (ii) the paucity of …
The Relationship Between Residential Status And Perception Of Psychological Separation Among Young College Students, Stephanie G. Raines
The Relationship Between Residential Status And Perception Of Psychological Separation Among Young College Students, Stephanie G. Raines
Theses
The purpose of this study was to examine the relationship between undergraduates' perception of psychological separation and residential status. Two groups of students, those who lived at home with their parents (n=3 I) and those who did not (n= 55), were surveyed using the Psychological Separation Inventory (PSI). Using the four subscale scores from the PSI, a t-test for independent samples found no significant relationship between residential status and psychological separation. Additional statistical analysis failed to find a relationship between the scores and independent variables such as gender, age and years in college. It was concluded that this research failed …
Scale, Ecological Fallacy, And The River Continuum Concept, Hope M. Childers
Scale, Ecological Fallacy, And The River Continuum Concept, Hope M. Childers
Graduate Theses, Dissertations, and Problem Reports (ETD)
Concern over scale is not new, and it is not restricted to geographers. Spatial and temporal scaling is a conceptual and methodological problem for all sciences using geographic information. This paper teases out issues of scale and ecological fallacy from the literature and discusses how these issues influence the applicability of an influential theoretical framework in stream ecology, the River Continuum Concept (RCC). Investigators are faced with decisions regarding scale during sampling location selection, field data capture, and subsequent data interpretation. A thorough understanding of the heterogeneity of stream habitats and the life histories of the organisms being studied could …