Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 20941 - 20970 of 25021

Full-Text Articles in Entire DC Network

Canadian Cooperative Wildlife Health Centre Newsletter, Volume 4-2, Winter 1996 Jan 1996

Canadian Cooperative Wildlife Health Centre Newsletter, Volume 4-2, Winter 1996

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

Involvement in Mexico New Diagnostic Tools Hook Lake Wood Bison Recovery Project Progress Report - July 1996 Conjunctivitis in cormorants - Prince Edward IslandTularemia in snowshoe hares - Nova Scotia Seasonal mortality of terns continues in Kouchibouguac National Park, New Brunswick Belugas from the St. Lawrence Estuary Secondary Tyzzar's Disease in a Racoon infected with Canine Distemper Diazinon poisoning in Geese Newcastle disease in cormorants Herpesvirus in owls Predator Attacks Botulism - 1996 Winter Mortality In Peace River Region Ungulates Diazinon poisoning of American wigeon


Soils Of The Mount Beaumont Area, G G. Scholz, Henry Smolinski Jan 1996

Soils Of The Mount Beaumont Area, G G. Scholz, Henry Smolinski

Land resources series

Mount Beaumont Mount Beaumont is approximately 100 km north-east of Esperance in the south-east of Western Australia. In 1982 an area of 35,000 ha of virgin Crown Land was released for agriculture (identified as Mount Beaumont Stage I) and later it was proposed to release a further 33,600 ha (Mount Beaumont Stage II). Following development of the first stage, doubts arose about the suitability of the soils for agriculture, so the Department of Agriculture (now Agriculture Western Australia) surveyed the soils of the Mount Beaumont Stage II area before further land release. The survey indicated severe limitations to production and …


The Probe, Issue 162 – January/February 1996 Jan 1996

The Probe, Issue 162 – January/February 1996

The Probe: Newsletter of the National Animal Damage Control Association

Trapping Weasels-- James E. Forbes, Past President
From the Incoming President-- Eugene A. LeBoeuf
NADCA Membership Directory
• Draft NADCA Position Statements on Wildlife Reintroduction Aquaculture Regulated Hunting Trapping Wildflife Damage Management
NADCA Committees


The Fish And Wildlife Service-Extension Connection, Duncan Macdonald Jan 1996

The Fish And Wildlife Service-Extension Connection, Duncan Macdonald

Triennial National Wildlife and Fisheries Extension Specialists Conference: 8th (1996)

We go back a long, long way! When the U.S. Fish and Wildlife Service (FWS) first established an office to cooperate directly with the Extension System's fish and wildlife component, I was a mere lad of 49. I became involved 4 years later, still a very young man! Now that the program and I have matured it's a good time to reflect on past accomplishments and associations and to look ahead to a continuing productive relationship.


Performance Of Vegetative Filter Strips With Varying Pollutant Source And Filter Strip Lengths, Puneet Srivastava, Dwayne R. Edwards, Tommy C. Daniel, Philip A. Moore Jr., Thomas A. Costello Jan 1996

Performance Of Vegetative Filter Strips With Varying Pollutant Source And Filter Strip Lengths, Puneet Srivastava, Dwayne R. Edwards, Tommy C. Daniel, Philip A. Moore Jr., Thomas A. Costello

Biosystems and Agricultural Engineering Faculty Publications

Vegetative filter strips (VFS) can reduce runoff losses of pollutants such as nitrogen (N) and phosphorus (P) from land areas treated with fertilizers. While VFS effectiveness is considered to depend on lengths of pollutant source and VFS areas, there is little experimental evidence of this dependence, particularly when the pollutant source is manure-treated pasture. This study assessed the effects of pollutant source area (fescue pasture treated with poultry litter) length and VFS (fescue pasture) length on VFS removal of nitrate N (NO3-N), ammonia N (NH3-N), total Kjeldahl N (TKN), ortho-P (PO4-P), total P (TP), …


Degradation Of Remnant Vegetation, Richard George, Don Mcfarlane, Russell Speed Jan 1996

Degradation Of Remnant Vegetation, Richard George, Don Mcfarlane, Russell Speed

Journal of the Department of Agriculture, Western Australia, Series 4

Remnant vegetation, wetlands and riverine systems on both private and public land throughout south-western Australia are being rapidly degraded by dryland salinity, inundation, silting, nutrient enrichment and weed invasion. Richard George, Don McFarlane and Russel Speed outline some of the reasons why this is happening and provide some case studies that highlight actions to protect these remnants.


Septic Systems For Homeowners, William O. Thom Jan 1996

Septic Systems For Homeowners, William O. Thom

Agriculture and Natural Resources Publications

Septic systems are an effective, long-standing method for collecting, treating, and disposing of wastewaters from rural and surburban homes that do not have access to municipal sewage treatment plants. They collect and treat wastewaters produced in the bathroom, kitchen, and laundry of a home before discharging them into the soil. These systems are used by homeowners in every county in Kentucky.


Early Life History Of Yellow Perch In Eastern South Dakota Lakes, Shannon Fisher Jan 1996

Early Life History Of Yellow Perch In Eastern South Dakota Lakes, Shannon Fisher

Electronic Theses and Dissertations

Yellow perch Perea flavescens are a popular South Dakota sportfish; however, inconsistent recruitment creates highly variable and unpredictable perch fishery quality. Before fishery managers can begin to develop and assess strategies to stabilize yellow perch recruitment, a better understanding of their early life history is required. I selected two natural lakes with differing yellow perch population types and monitored brood stock, spawning habits, and larval and juvenile life history patterns during 1995 and 1996. Pelican Lake was selected as a representative yellow perch population exhibiting inconsistent recruitment and Pickerel Lake as a population with relatively consistent recruitment. Yellow perch tended …


Task Ll Report, Part 2: Evaluation Of Water Supplies In The Red River, Dix River, And Mainstem Watersheds Of The Kentucky River, D. I. Carey, A. W. Fogle, L. G. Morris Jan 1996

Task Ll Report, Part 2: Evaluation Of Water Supplies In The Red River, Dix River, And Mainstem Watersheds Of The Kentucky River, D. I. Carey, A. W. Fogle, L. G. Morris

KWRRI Research Reports

This study was part of a larger study of water supplies throughout the Kentucky River Basin conducted by the Kentucky Water Resources Research Institute for the Kentucky River Authority. This report examines municipal and private water supplies in the Red River, Dix River, and mainstem Kentucky River watersheds. Municipal supplies which depend on the mainstem Kentucky River, and municipal and private supplies in the North, South, and Middle Fork watersheds of the Kentucky River basin are examined in separate reports.


Fish Lateral Line Neurophysiological And Neurobehavioral Responses As A Sensitive Water Quality Monitoring System, Hong Y. Yan Jan 1996

Fish Lateral Line Neurophysiological And Neurobehavioral Responses As A Sensitive Water Quality Monitoring System, Hong Y. Yan

KWRRI Research Reports

Cadmium is a heavy metal ion that can cause deleterious effects on aquatic animals. This study uses both electrophysiological recordings from lateral line nerves and videotaping of schooling behavior to investigate the effects of cadmium exposure on fish. The fathead minnows were exposed to cadmium at a concentration of 450 μg/1 over a 24-hr period. Extracellular recording with a silver hook electrode was used to record compound action potentials from the lateral lines of control and experimental fish. After a short time exposure (24 hr) to cadmium ions, all of the electrophysiological activities of the lateral line nerves were suppressed. …


Describing The Elephant: Multiple Perspectives In New York City's Watershed Protection Conflict, Krystyna Anne Stave Jan 1996

Describing The Elephant: Multiple Perspectives In New York City's Watershed Protection Conflict, Krystyna Anne Stave

Public Policy and Leadership Faculty Research

New York City's efforts to avoid filtration mandated by the 1986 Safe Drinking Water Act Amendments and the 1989 Surface Water Treatment Rule have generated considerable controversy. Since the conflict began in 1990, a spectrum of stakeholder groups has emerged, representing land owners, sport fishermen, businesses, environmental groups, developers, and watershed communities. What was originally defined by New York City water supply managers as a scientific problem--identifying sources of water quality degradation and preventing contaminants from entering the water supply system--now has broadened to include a diverse set of social and economic issues as well.


Synthetic Organic Compounds: Las Vegas Wash And Lake Mead, National Water Quality Assessment Program (Nawqa): Nevada Basin And Range Jan 1996

Synthetic Organic Compounds: Las Vegas Wash And Lake Mead, National Water Quality Assessment Program (Nawqa): Nevada Basin And Range

Publications (WR)

The Nevada Basin and Range (NVBR) study unit of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program is investigating the status of, trends in, and factors affecting water quality in the Las Vegas area. A principal objective of the investigation is to assess the effects of urbanization on the quality of area water resources. Las Vegas Wash is the surface-water outlet for the Las Vegas area. The wash transports stormwater runoff, shallow ground-water discharge, and tertiary-treated sewage effluent from the Las Vegas area to Las Vegas Bay of Lake Mead on the Colorado River. Most of the flow—about 96 …


An Interdisciplinary Water Quality Curriculum For Middle School Students, Barbara Michelle Cleveland Jan 1996

An Interdisciplinary Water Quality Curriculum For Middle School Students, Barbara Michelle Cleveland

All Graduate Projects

An interdisciplinary curriculum correlating water quality with the disciplines of physical science and mathematics for 6th grade middle school students was developed. Literature examined indicates that the opportunity to explore key concepts and significant issues using an integrated approach provided greater opportunity to formulate meaningful connections between disciplines studied and that achievement was enhanced. The Learning units were developed for use at Wilson Middle School in Yakima, Washington.


A Guide For Extending Nature Lessons At The Yakima Arboretum, Marilou Cori Kinder Jan 1996

A Guide For Extending Nature Lessons At The Yakima Arboretum, Marilou Cori Kinder

All Graduate Projects

The importance of providing a hands on natural environment curriculum was examined. Sources from 1938-1996 were found supporting the importance of such a curriculum. A search was conducted on the availability of a natural habitat curriculum that used a local resource. The search discovered the Yakima Arboretum had seven areas of interest along with a packet of brief lesson suggestions. These lessons were extended to include classroom activities that would provide students with background knowledge prior to a field trip to the Arboretum.


Seasonal Influences On Freshwater Fisheries Sampling Data, Kevin L. Pope, David W. Willis Jan 1996

Seasonal Influences On Freshwater Fisheries Sampling Data, Kevin L. Pope, David W. Willis

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Fisheries managers often assess fish populations using catch per unit effort (CPUE), size and age structure, growth, and condition. For many freshwater fishes and common sampling gears, CPUE, size and age structure, and condition are highest in the spring and fall, while growth commonly is fastest during the summer growing season. However, there are exceptions to these general trends, especially in populations with erratic recruitment, growth, or mortality. At the least, CPUE, size and age structure, growth, and condition of fish should be expected to change with season, given the effects of variable recruitment, growth, and mortality. However, if recruitment, …


Fish Advisories: Useful Or Difficult To Interpret?, Joanna Burger, Michael Gochfeld Jan 1996

Fish Advisories: Useful Or Difficult To Interpret?, Joanna Burger, Michael Gochfeld

RISK: Health, Safety & Environment (1990-2002)

The authors note that fish and shellfish offer significant exposure to environmental toxins but find that consumer knowledge and other factors may limit efforts to control risk in urban populations.


Mechanisms Of Pentachlorophenol Induced Charge Transport In Lipid Membranes, William Charles Brown Jan 1996

Mechanisms Of Pentachlorophenol Induced Charge Transport In Lipid Membranes, William Charles Brown

Dissertations and Theses

Pentachlorophenol (PCP) is one of the prominent environmental pollutant that has penetrated into food chain and is present in humans. Health concerns have been raised since daily intake of PCP by the US population is estimated to be 16-19 µg. PCP facilitates dissipation of electrochemical potential gradients of hydrogen ions across energy transducing membranes, which are the energy sources for the conversion of adenosine diphosphate into adenosine triphosphate. Closely linked to these dissipative effects is the development of electrical conductivity in lipid membranes, induced by the presence of PCP. Three modes of PCP - induced membrane electrical conductivity were theoretically …


Captive Environmental Influences On Behavior In Zoo Drills And Mandrills (Mandrillus), A Threatened Genus Of Primate, Erik Terdal Jan 1996

Captive Environmental Influences On Behavior In Zoo Drills And Mandrills (Mandrillus), A Threatened Genus Of Primate, Erik Terdal

Dissertations and Theses

Drills (Mandrillus leucophaeus) are an endangered species of African monkey (Cercopithecidae), and their sole congener the mandrill (Mandrillus sphinx) is vulnerable to extinction. Both species are threatened in the wild by deforestation and hunting.

Drills have a poor record of captive reproduction. Many individuals appear to have behavioral deficiencies which interfere with reproduction. Thus, the zoo population of drills does not serve as a “hedge” against the species’ total extinction: drills are endangered in captivity as well as in the wild. Mandrills, by contrast, reproduce well in captivity. Information on the behavior of mandrills in captivity may help zoo managers …


Leaner Environmental Policies For Agriculture, David E. Ervin, Elisabeth A. Graffy Jan 1996

Leaner Environmental Policies For Agriculture, David E. Ervin, Elisabeth A. Graffy

Economics Faculty Publications and Presentations

Farmers and ranchers face a most troubling dilemma. Complex political forces have mapped two quite different paths to environmental management-a rollback of federal regulations or a buildup of traditional subsidies. In the words of a famous modern philosopher, "When you reach a fork in the road, take it!" But either choice poses risk for the industry and will not likely ameliorate nettlesome environmental problems. A third path could help the industry maintain competitiveness and meet environmental challenges. This path uses me latest science to identify agroenvironmental problems and emphasizes economically attractive technology to sustain environmental improvements.


Land Use Planning For Agriculture And Sustainable Rural Development, Ian Kininmonth, Andrew Bathgate, Ross George, Dennis Van Gool Jan 1996

Land Use Planning For Agriculture And Sustainable Rural Development, Ian Kininmonth, Andrew Bathgate, Ross George, Dennis Van Gool

Journal of the Department of Agriculture, Western Australia, Series 4

An important goel for agriculture will be to achieve sustainable land use patterns and management systems.

Land use planning has a role to play in helping agticulture achieve this goal. Ian Kininmouth, Andrew Bathgate, Ross George and Dennis Van Gool discuss the directions land use planning could follow.


Utah Water Research Laboratory Publications Listing 1993-1996, David S. Bowles, Leaunda S. Hemphill Jan 1996

Utah Water Research Laboratory Publications Listing 1993-1996, David S. Bowles, Leaunda S. Hemphill

Reports

No abstract provided.


Volatile Infochemicals Used In Host And Host Habitat Location By Cotesia Flavipes Cameron And Cotesia Sesamiae (Cameron) (Hymenoptera: Braconidae), Larval Parasitoids Of Stemborers On Graminae, Adele J. Ngi-Song, William A. Overholt, Peter G.N. Njagi, Marcel Dicke, Jonathan N. Ayertey, Wilbert Lwande Jan 1996

Volatile Infochemicals Used In Host And Host Habitat Location By Cotesia Flavipes Cameron And Cotesia Sesamiae (Cameron) (Hymenoptera: Braconidae), Larval Parasitoids Of Stemborers On Graminae, Adele J. Ngi-Song, William A. Overholt, Peter G.N. Njagi, Marcel Dicke, Jonathan N. Ayertey, Wilbert Lwande

All Peer-Reviewed Publications

Female Cotesia flavipes Cameron and Cotesia sesamiae (Cameron) were attracted to odors in a Y-tube olfactometer from uninfested maize (Zea mays L.), sorghum [Sorghum bicolor (L.)]. and napier grass (Pennisetum purpureum Schumach). In dual choice tests. Cotesia flavipes showed a preference for maize over sorghum, while maize and napier grass were equally attractive. In contrast, Cotesia sesamiae preferred volatiles from sorghum and napier grass over those from maize. The two parasitoids were significantly more attracted to maize infested with the stemborers, Chilo partellus (Swinhoe), Chilo orichalcociliellus Strand, Sesamia calamistis Hampson, and Busseola fusca (Fuller), than uninfested maize. In dual choice …


Energy And Deforestation In Ghana: A Study Of Woodfuel-Deforestation Links In Rural Ghana, Iddrisu Adam Jan 1996

Energy And Deforestation In Ghana: A Study Of Woodfuel-Deforestation Links In Rural Ghana, Iddrisu Adam

Theses and Dissertations (Comprehensive)

Forests are one of the most valuable natural resources of many countries, including Ghana. Timber and other forest products have contributed immensely to the development of the country. These same forests have been a source of sustenance to the Ghanian people. Most particularly, forests have been the principal source of domestic energy by way of providing woodfuels. The heavy reliance on forest resources is taking its toll on the health of Ghanaian forests. In recent years, there has been increased awareness of the depletion of trees—a problem that many researchers have attributed to the over-exploitation of forests especially for domestic …


An Investigation Into The Use Of The Freshwater Crayfish Marron (Cherax Tenuimanus) As A Flagship For The Restoration Of The Blackwood River, Rachael Nickoll Jan 1996

An Investigation Into The Use Of The Freshwater Crayfish Marron (Cherax Tenuimanus) As A Flagship For The Restoration Of The Blackwood River, Rachael Nickoll

Theses : Honours

The Marron (Cherax tenuimanus) is arguably the most easily identified and ecologically important aquatic animal species in south-western Australian rivers. In fact it is quintessientially south-western Australian, endemic to the south-west corner of the continent and supporting a recreational fishery and commercial aquaculture industry within the state. Marron have keystone qualities as hosts of various epiphytic flora and fauna, and are central to the food web within south-west rivers. Their sensitivity to depleted oxygen conditions have also made them a potential "indicator" for water quality degradation. The study investigated these qualities in reference to the marron's potential as …


Modelling The Effects Of Rehabilitation And Changed Agricultural Practices In A Saline-Affected Rural Catchment, M. K. Heller Jan 1996

Modelling The Effects Of Rehabilitation And Changed Agricultural Practices In A Saline-Affected Rural Catchment, M. K. Heller

Theses : Honours

The Bremer river catchment, on the South-coast of Western Australia, is typical of most river catchments in this region in that it has been seriously affected by sedimentation, salinisation and eutrophication brought on by the gradual dominance of agricultural land management practices. Vegetated rehabilitation and changed agricultural land management practices (ie minimum / zero tillage) have now been widely adopted throughout the catchment in response to these degradation issues. This study examined the potential impact minimum / zero tillage, vegetated rehabilitation and remnant vegetation could have on both a farm and catchment wide scale. A Geographical Information System was developed …


People As Part Of Ecosystems, William E. Riebsame, University Of Colorado Boulder. Natural Resources Law Center Jan 1996

People As Part Of Ecosystems, William E. Riebsame, University Of Colorado Boulder. Natural Resources Law Center

Books, Reports, and Studies

30 p. : ill. ; 28 cm


The Watershed Source Book: Watershed-Based Solutions To Natural Resource Problems, Wendy S. Rudnik, David H. Getches, Teresa A. Rice, Betsy Rieke, University Of Colorado Boulder. Natural Resources Law Center Jan 1996

The Watershed Source Book: Watershed-Based Solutions To Natural Resource Problems, Wendy S. Rudnik, David H. Getches, Teresa A. Rice, Betsy Rieke, University Of Colorado Boulder. Natural Resources Law Center

Books, Reports, and Studies

1 v. (various pagings) : maps (2 folded) ; 28 cm


Water Current, Volume 27, No. 6, December 1995 Dec 1995

Water Current, Volume 27, No. 6, December 1995

Water Current Newsletter

Buffer Strips Trap Contaminants
From the Director: Lack of Call of Proposals Sign of Politics at Work
Riparian Buffer Strips Prevent Pollution
Might Missouri Conference Topic
Manure Application Studied
Research Brief: A Multivariate Index Methodology for Landfill Site Characterization Using Geophysics and Geostatistics
Nebraska Water News
Guide for Sealing Wells Available from UNL
Symposium Focuses on Integrated Approach
Booklet Helps Find Water Information
Speaker Compares Public, Technical Views
Drijber Gets Into Microbial Communities
Dishrags Breeding Ground for Bacteria
Seminar Series to Present Views on Platte River Management


The Probe, Issue 161 – December 1995 Dec 1995

The Probe, Issue 161 – December 1995

The Probe: Newsletter of the National Animal Damage Control Association

Animal Activists Take Bear Issues to Idaho, Michigan, Massachusetts, and Washington
Canada Geese Almost "Get" Gingrich
Egrets Causing Health Hazards in Oklahoma
Pigeons Hitch a Ride In London
Book Review: Variations of the Flat Set, by Charles Dobbins. 1995. Sullivan Productions, Blue Creek, OH. 78 pages.
New Trapping Laws in Colorado


A Comparison Of Remediation Priorities Developed By The Defense Priority Model, The Relative Risk Evaluation Method, And A Quantitative Risk Assessment Approach, David M. Hunter Dec 1995

A Comparison Of Remediation Priorities Developed By The Defense Priority Model, The Relative Risk Evaluation Method, And A Quantitative Risk Assessment Approach, David M. Hunter

Theses and Dissertations

The Superfund, established by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, seriously underestimated both the number of severely contaminated sites and the associated cleanup cost. The magnitude of projected cleanup costs, coupled with shrinking federal budgets, necessitated the development and use of risk-based prioritization models among some federal agencies. Among these tools, the DOD prioritization models are meant to give priority to sites posing the greatest threat to human health. Their failure to properly rank sites could incorrectly shift the focus from those that pose substantial risk to sites of lesser risk. The DOD site ranking …