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 10381 - 10410 of 12796

Full-Text Articles in Entire DC Network

Biogeography Of The Short-Tailed Shrews (Blarina Brevicauda And B. Carolinensis) In The Tennessee River Valley And Adjacent Areas Of The Midsouth, Michael Jeffries Apr 1999

Biogeography Of The Short-Tailed Shrews (Blarina Brevicauda And B. Carolinensis) In The Tennessee River Valley And Adjacent Areas Of The Midsouth, Michael Jeffries

Honors Theses

In response to conflicting reports of the distribution of the two species of Blarina (B. brevicauda and B. carolinensis) in the Tennessee Valley area, specimens from The Natural History Museum of The University of Tennessee at Chattanooga and The University of Georgia were analyzed. Cranial measurements were used in both a discriminant function analysis and a principle components analysis to determine species assignments. Blarina brevicauda was found in central Tennessee, the highlands of the Cumberland Plateau, and the mountains of far east Tennessee, whereas B. carolinensis was found in the Ridge and Valley of southeast Tennessee, separated from B. brevicauda …


Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 1, Thomas Alge Apr 1999

Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 1, Thomas Alge

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

In worldwide aviation operations, bird collisions with aircraft and ingestions into engine inlets present safety hazards and financial loss through equipment damage, loss of service and disruption to operations. The problem is encountered by all types of aircraft, both military and commercial. Modern aircraft engines have achieved a high level of reliability while manufacturers and users continually strive to further improve the safety record. A major safety concern today includes common-cause events which involve significant power loss on more than one engine. These are externally-inflicted occurrences, with the most frequent being encounters with flocks of birds. Most frequently these encounters …


Resource Law Notes Newsletter, No. 46, Spring Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center Apr 1999

Resource Law Notes Newsletter, No. 46, Spring Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 3, Thomas Alge Apr 1999

Airport Bird Threat In North America From Large Flocking Birds (Geese) (As Viewed By An Engine Manufacturer)--Part 3, Thomas Alge

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

This paper focuses on the increasing threat to aircraft and engines posed by the recorded growth in geese populations in North America. Service data show that goose strikes to aircraft and engines are increasing, especially in North America - consistent with the growing resident geese populations estimated by the USDA. Airport managers, along with the governmental authorities, need to develop a strategy to address this large flocking bird issue. This paper also presents statistics on the overall status of the bird threat for birds of all sizes in North America relative to other geographic regions. Overall, the data show that …


Bird Proofing Hangars, Carl Lahser, Will Summers Apr 1999

Bird Proofing Hangars, Carl Lahser, Will Summers

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

Birds can damage flight line structures and create serious health and safety risks for workers. Many of our structures are old and not designed as bird proof. Many controllable factors are discussed but the underlying principles are to deny birds food, water and access to resting/nesting areas. Various "tools" are discussed including grounds and building maintenance, landscaping, personnel management, chemical deterrents, poisons, and shooting or trapping.


Benthic Community Analysis Of Hog Island Bay, Virginia, David James Lewis Apr 1999

Benthic Community Analysis Of Hog Island Bay, Virginia, David James Lewis

Biological Sciences Theses & Dissertations

The benthic infaunal macroinvertebrate communities of Hog Island Bay of the Virginia Eastern Shore were quantitatively sampled at 30 locations on August 31 and September 1, 1995. The primary objectives of this study were: (1) to characterize the subtidal macroinfaunal benthic communities of Hog Island Bay, (2) to examine relationships between abiotic factors and the macroinfaunal communities and (3) to characterize the environmental condition of the system using the Benthic Index of Biotic Integrity (B-IBI) (Weisburg et al. 1997) and the EMAP Benthic Index for the Virginian Province (Strobel et al. 1995).

The ecological condition of Hog Island Bay appears …


Letter To The Faa Regarding Modified Standards For Bird Strike Impacts, Paul F. Eschenfelder Mar 1999

Letter To The Faa Regarding Modified Standards For Bird Strike Impacts, Paul F. Eschenfelder

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

The Air Line Pilots Association (ALPA), representing the safety interests of 53,000 professional airline pilots flying for 51 airlines in the United States and Canada, has reviewed the notice of proposed rulemaking (NPRM) in the referenced docket. The NPRM proposes modified standards to which engines are certified with respect to their ability to withstand impacts from birds or similar wildlife hazards. We feel the proposed standard is a step in the right direction, but cannot under any circumstances be considered attainment of a goal. As outlined below, the data used in developing the NPRM has been superseded by more accurate …


Methods For The Diagnosis Of Acute 3-Chloro-P-Toluidine Hydrochloride Poisoning In Birds And The Estimation Of Secondary Hazards To Wildlife, John J. Johnston, Daniel B. Hurlbut, Michael L. Avery, Jack C. Rhyan Mar 1999

Methods For The Diagnosis Of Acute 3-Chloro-P-Toluidine Hydrochloride Poisoning In Birds And The Estimation Of Secondary Hazards To Wildlife, John J. Johnston, Daniel B. Hurlbut, Michael L. Avery, Jack C. Rhyan

United States Department of Agriculture Wildlife Services: Staff Publications

Female boat-tailed grackles poisoned with 3-chloro-p-toluidine hydrochloride (CPTH) were analyzed by necropsy and gas chromatography–mass spectrometry (GC-MS). The necropsies identified the presence of a white precipitate in the pericardium, which had been previously reported as a characteristic of CPTH-exposed birds. The GC-MS method, which utilized deuterated CPTH as a surrogate, quantified CPTH residues in the breast tissue and gastrointestinal tract of CPTH-exposed birds. Comparison of these techniques indicated that the GC-MS method was more accurate for assessing CPTH poisoning in birds. Regression analyses of consumption versus residue data indicated that the sum of breast and gastrointestinal residues can …


Fisheries Research Report No. 113 - Catch, Effort And The Conversion From Gill Nets To Traps In The Peel-Harvey And Cockburn Sound Blue Swimmer Crab (Portunus Pelagicus) Fisheries, Roy Melville-Smith, Mark Cliff, Sonia M. Anderton Mar 1999

Fisheries Research Report No. 113 - Catch, Effort And The Conversion From Gill Nets To Traps In The Peel-Harvey And Cockburn Sound Blue Swimmer Crab (Portunus Pelagicus) Fisheries, Roy Melville-Smith, Mark Cliff, Sonia M. Anderton

Fisheries Research Reports

Over the last few years, there has been considerable interest on the part of commercial fishers to move away from using gill nets, the traditional method for fishing for blue swimmer crabs in Western Australia (WA), to fishing with traps. Blue swimmer crab fisheries in WA are regulated by effort controls and most gill net fishers are restricted to hauling 1,000 metres (1,200 metres in the case of Cockburn Sound) of gill net per day.

The fieldwork in this study was initiated in March 1994 in Cockburn Sound and in January 1996 in the Peel-Harvey Estuary. It was aimed at …


Horticulture Research Report 1994 - 1998, Frank Wise Institute, Kununurra, Department Of Agriculture, Western Australia, D. Robinson, M. Howes, R. Randell Mar 1999

Horticulture Research Report 1994 - 1998, Frank Wise Institute, Kununurra, Department Of Agriculture, Western Australia, D. Robinson, M. Howes, R. Randell

Horticulture research reports

This report summarises horticultural research, development and extension activities undertaken by staff from the Kununurra District Office during the period 1993 to 1998 and reported annually at the Frank Wise Institute Horticultural Research Review. The range and extent of activities presented and supported by Agriculture Western Australia with industry collaboration indicates the importance of horticulture in the economies of the Kimberley Region and Western Australia. Further support by funding bodies and agribusiness, and collaboration with other research organizations is also acknowledged. Since the early 1980's, horticultural output and value of production from the Ord River Irrigation Area (ORIA) have risen …


Land Development And Biotechnology At The Claremont Colleges, Paul Faulstich Feb 1999

Land Development And Biotechnology At The Claremont Colleges, Paul Faulstich

Pitzer Faculty Publications and Research

Founded on the Oxford model of a cluster of institutions, the Claremont Colleges has periodically established a new school. In the Spring of 1997, the Board of Fellows of the Claremont University Center charged with policy-making for the consortium-voted to establish a seventh college; the Keck Graduate Institute of applied life sciences. or bioengineering. Despite other landholdings, including a golf course and a non-operational gravel quarry, the Board of Fellows voted to site the New Venture on a portion-approximately eleven acres--of the Bernard Biological Field Station. (Pitzer's vote was cast against building on the Field Station.)


The Probe, Issue 197 – February 1999 Feb 1999

The Probe, Issue 197 – February 1999

The Probe: Newsletter of the National Animal Damage Control Association

A History of the Wildlife Services Program -- Donald W. Hawthorne, Gary L. Nunley, and Vivian Prothro, USDA-APHIS-Wildlife Services, Oklahoma and Texas Message from the President

Abstracts from the 5th Annual Conference of The Wildlife Society

Diverse Applications of Sharpshooting to Manage Abundant Deer Populations -- A.J. DeNicola, H.C. Frost, and K.E. Gustad.
Wildlife on Airports: A Fatal Attraction! -- R.A. DolbeerandS.E. Wright
An Empirical Model for Predicting Deer Population Trends in Suburban Chicago, Illinois -- DM. Etter, TJt. VanDeelen,R.E. Warner, andB.M. Hannon
Oral Vaccination Programs Against Canine Rabies in Texas -- M.G. Fearneyhough
Public Health and Safety Significance of …


Source Water Assessment Plan, Water Quality Division Feb 1999

Source Water Assessment Plan, Water Quality Division

Publications (WR)

The safe drinking water amendments of 1996 placed a strong emphasis on the goal to establish a nationwide effort to protect drinking water sources. As part of that goal, the legislation provided for a preliminary assessment of drinking water sources and an inventory of surrounding adjacent land use (ALUs). This nationwide effort will result in the first comprehensive look at the nation's drinking water sources from an assessment perspective. One of the outcomes of this nationwide assessment will be information that public water systems (PWSs) can use to help determine appropriate monitoring frequencies and to protect their sources of drinking …


Arizona Source Water Assessment Plan Final Draft, Arizona Department Of Environmental Quality Feb 1999

Arizona Source Water Assessment Plan Final Draft, Arizona Department Of Environmental Quality

Publications (WR)

The safe drinking water amendments of 1996 placed a strong emphasis on the goal to establish a nationwide effort to protect drinking water sources. As part of that goal, the legislation provided for a preliminary assessment of drinking water sources and an inventory of surrounding adjacent land use (ALUs). This nationwide effort will result in the first comprehensive look at the nation's drinking water sources from an assessment perspective. One of the outcomes of this nationwide assessment will be information that public water systems (PWSs) can use to help determine appropriate monitoring frequencies and to protect their sources of drinking …


Water Current, Volume 31, No. 1, February 1999 Feb 1999

Water Current, Volume 31, No. 1, February 1999

Water Current Newsletter

Celebrating Five Years of "Earth Wellness"
From the Director: Water Center Director Announces Resignation; Accepts Director's Post at University of Kentucky
Still Time to Pre-Register for "Nebraska Water 2000" Conference
"Awesome Aquifer Adventure" Coming to Grand Island
Lining Nebraska's Landscape
Groundwater Guardians Work to Improve Local Groundwater Protection Efforts
Water News Briefs
Community Resources Guide
Free Wetlands Tabloid
Becoming a Groundwater Guardian
Go Big Flush
Sink Your Feet In
Joint Research Aims to Reduce Blue River Basins Herbicide Runoff


Internal Temperature Of Douglas-Fir Buds Is Altered At Elevated Temperature, Martha E. Apple, Melissa S. Lucash, David M. Olszyk, David T. Tingey, Donald L. Phillips Feb 1999

Internal Temperature Of Douglas-Fir Buds Is Altered At Elevated Temperature, Martha E. Apple, Melissa S. Lucash, David M. Olszyk, David T. Tingey, Donald L. Phillips

Environmental Science and Management Faculty Publications and Presentations

Pseudotsuga menziesii (Douglas-fir) saplings were grown in sun-lit controlled environment chambers at ambient or elevated (4°C above ambient) temperature. We measured internal temperatures of vegetative buds with thermocouple probes and compared temperatures of normal buds and abnormal buds with loosened, rosetted outer scales in elevated temperature chambers. The abnormal buds had higher and earlier peak daily temperatures than normal buds. Elevated temperature may influence the internal temperature of buds and contribute to the development of abnormal, rosetted buds with loosened outer scales. Abnormal bud development may alter branching patterns and allometry of Douglas-fir trees subjected to climatic change.


Oxidation Of Dimethyl-Ether And Ethylene In The Atmosphere And Combustion Environment And Thermodynamic Studies On Hydrofluorocarbons Using Ab Initio Calculation Methods, Takahiro Yamada Jan 1999

Oxidation Of Dimethyl-Ether And Ethylene In The Atmosphere And Combustion Environment And Thermodynamic Studies On Hydrofluorocarbons Using Ab Initio Calculation Methods, Takahiro Yamada

Dissertations

Reaction pathways and kinetics are analyzed on CH3OC·H2 unimolecular decay and on the complete CH3OC·H2 + O2 reaction system using thermodynamic properties (ΔHf°298, S°298, and C(T) 300≤T/K≤1500) derived by two ab initio calculation methods, CBS-q and G2. These are used to determine thermodynamic properties of reactants, intermediate radicals and transition state (TS) compounds. Quantum Rice-Ramsperger-Kassel (QRRK) analysis is used to calculate energy dependent rate constants, k(E), and master equation is used to account for collisional stabilization. Comparison of calculated fall-off with experiment indicates that the CBS-q and …


Environmental Technology Transfer And Foreign Investment : Factors Impacting Environmental Protection In A Transition-Era Cuba, Aldo M. Leiva Jan 1999

Environmental Technology Transfer And Foreign Investment : Factors Impacting Environmental Protection In A Transition-Era Cuba, Aldo M. Leiva

Institute for Cuban & Cuban-American Studies Occasional Papers

No abstract provided.


Filter Strip Performance And Processes For Different Vegetation, Widths, And Contaminants, T. J. Schmitt, M. G. Dosskey, K. D. Hoagland Jan 1999

Filter Strip Performance And Processes For Different Vegetation, Widths, And Contaminants, T. J. Schmitt, M. G. Dosskey, K. D. Hoagland

School of Natural Resources: Faculty Publications

Filter strips are widely prescribed to reduce contaminants in surface runoff from agricultural fields. Tbis study compared performance of different filter strip designs on several contaminants and evaluated the contribnting processes. Different vegetation types and widths were investigated using simulated runoff event on large plots (3 m X 7.5 or 15 m) having fine-textured soil and a 6 to 7% slope. Filter strips 7.5 and 15 m wide downslope greatly reduced concentrations of sediment in runoff (76-93%) and contaminants strongly associated with sediment (total P, 55-79%; permethrin, 27-83% [(3-phenoxyphenyl) methyl (±)-cis, trans-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane carboxylate ]). They had less effect on concentrations …


An Objective Method For Determining Principal Time Scales Of Coherent Eddy Structures Using Orthonormal Wavelets, Jozsef Szilagyi, Marc B. Parlange, Gabriel G. Katul, John D. Albertson Jan 1999

An Objective Method For Determining Principal Time Scales Of Coherent Eddy Structures Using Orthonormal Wavelets, Jozsef Szilagyi, Marc B. Parlange, Gabriel G. Katul, John D. Albertson

School of Natural Resources: Faculty Publications

No abstract provided.


A Revised Measurement Methodology For Conifer Needles Spectral Optical Properties: Evaluating The Influence Of Gaps Between Elements, Mark A. Mesarch, Elizabeth Walter-Shea, Gregory P. Asner, Elizabeth M. Middleton, Stephen Chan Jan 1999

A Revised Measurement Methodology For Conifer Needles Spectral Optical Properties: Evaluating The Influence Of Gaps Between Elements, Mark A. Mesarch, Elizabeth Walter-Shea, Gregory P. Asner, Elizabeth M. Middleton, Stephen Chan

School of Natural Resources: Faculty Publications

Gaps are unavoidable when compositing small or narrow plant parts (e.g., conifer needles, twigs, narrow leaves, and leaflets) on sample holders in preparation for measuring spectral optical properties. The Daughtry et al. (1989) (A new technique to measure the spectral properties of conifer needles. Remote Sens. Environ. 27:81-91.) method of measuring conifer needle optical properties utilizes a relatively large gap fraction (approximately 0.3-0.6) and needles painted black on one surface of the sample from which the gap fraction of the sample is indirectly determined. Following this protocol typically results in distortions in optical properties, including underestimates in transmittance (sometimes negative …


The Role Of Trust In The North Blackforest: An Evaluation Of A Citizen Panel Project, Ragnar E. Löfstedt Jan 1999

The Role Of Trust In The North Blackforest: An Evaluation Of A Citizen Panel Project, Ragnar E. Löfstedt

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

Dr. Löfstedt explores the effectiveness of a public participation project conducted in Germany, designed to involve citizens in the siting of municipal waste disposal plants.


Expert And Lay Mental Models Of Ecosystems: Inferences For Risk Communication, Jeffrey K. Lazo, Jason Kinnell, Toby Bussa, Ann Fisher, Nathan Collamer Jan 1999

Expert And Lay Mental Models Of Ecosystems: Inferences For Risk Communication, Jeffrey K. Lazo, Jason Kinnell, Toby Bussa, Ann Fisher, Nathan Collamer

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

The authors evaluate a mental modeling approach to studying differences between lay and expert comprehension of ecosystems.


Resource Law Notes Newsletter, No. 45, Winter Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center Jan 1999

Resource Law Notes Newsletter, No. 45, Winter Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


Outside Four Walls: Implementing Environmental Education Out-Of-Doors On School Campuses, Diane Marie Bruns Jan 1999

Outside Four Walls: Implementing Environmental Education Out-Of-Doors On School Campuses, Diane Marie Bruns

Theses Digitization Project

No abstract provided.


Procedure For Raising Trout In The Classroom As Part Of Environmental Education, Ronn Chapman Jan 1999

Procedure For Raising Trout In The Classroom As Part Of Environmental Education, Ronn Chapman

Theses Digitization Project

No abstract provided.


Coastal Land And Groundwater For Horticulture From Gingin To Augusta, Dennis Van Gool, Werner Runge Jan 1999

Coastal Land And Groundwater For Horticulture From Gingin To Augusta, Dennis Van Gool, Werner Runge

Resource management technical reports

Due to a variety of factors, including infrastructure needs, labour requirements and transport costs, horticulture is normally located near major urban centres. This study focuses on the coastal plain region from Gingin to Augusta. This region accomodates over 80% of Western Australia's population and includes the States major urban centres. This region also accounts for over half the State's horticultural production with a gross value of production of $244 million.


The Probe, Issue 196 – January 1999 Jan 1999

The Probe, Issue 196 – January 1999

The Probe: Newsletter of the National Animal Damage Control Association

A History of the Wildlife Services Program -- Donald W. Hawthorne, Gary L. Nunley, and Vivian Prothro, USDA-APHIS-Wildlife Services, Oklahoma and Texas
Position Available: Postdoctoral Research Associate, U.S.D.A. Agricultural Research Service, Stuttgart National Aquaculture Research Center (SNARC) in Stuttgart, Arkansas.
Book Review: "Being Kind to Animal Pests: A No-Nonsense Guide to Humane Animal Control with Cage Traps" by Steve Meyer (self-published), Garrison, I A 1991. 132 pages.
Position Announcement: Post Graduate Researcher, Dept. of Wildlife, Fish and Conservation Biology, University of California, Davis
Scmidt Appointed to AVMA Panel on Euthanasia

Abstracts from the 5th Annual Conference of The Wildlife Society, …


Evaluation Of The Potential Economic Impacts Of 40 Cfr 197: Environmental Radiation Standards For Yucca Mountain, Nevada, United States Environmental Protection Agency Jan 1999

Evaluation Of The Potential Economic Impacts Of 40 Cfr 197: Environmental Radiation Standards For Yucca Mountain, Nevada, United States Environmental Protection Agency

All U.S. Government Documents (Utah Regional Depository)

The Administrator of the U.S. Environmental Protection Agency (EPA), pursuant to section 801 of the Energy Policy Act of 1992 (EnPA), is proposing a rule which contains standards for the protection of the public from releases of radioactive materials stored or disposed of in the repository at the Yucca Mountain site in Nevada. This report, as required by Executive Order 12866, provides an assessment of the economic impacts of the proposed rule. As the Agency is hindered by the unavailability of necessary information to perform a rigorous quantitative economic assessment, this report provides background to the standards being proposed, a …


A Synthesis Of Archaeological Studies On The Utah Test And Training Range, U.S. Air Force Jan 1999

A Synthesis Of Archaeological Studies On The Utah Test And Training Range, U.S. Air Force

All U.S. Government Documents (Utah Regional Depository)

This report, conducted by Statistical Research, Inc., under contract with the National Park Service, is a synthesis of research to date on the prehistoric and historical archaeology of the Utah Testing and Training Range, two U.S. Air Force training ranges under the jurisdiction of Hill Air Force Base. Results are presented in eight chapters. Topics include present and past environments, paleontological resources, a cultural-historical overview, previous research in the project area (including information on all archaeological resources known as of October 1998), and Native American concerns. This synthesis is used as the backdrop for a brief research design for both …