Physical Sciences and Mathematics Commons^™

Assessment Of Endocrine And Gonadal Condition Of Male Largemouth Bass From Lake Mead, Nevada, Reynaldo Patino, Steven L. Goodbred, Erik Orsak, Jill A. Jenkins, Michael R. Rosen

Lake Mead Science Symposium

Las Vegas Bay (LVB) of Lake Mead receives combined flows of tertiary treated wastewater effluent, urban runoff, and groundwater from the Las Vegas metropolitan area. This study examined the potential for endocrine disrupting effects of these anthropogenic inputs on male largemouth bass (Micropterus salmoides). Adult male bass were collected at two sites within Lake Mead: Overton Arm (OA, reference site), and Las Vegas Bay (LVB). Post-spawn fish were collected in July 2007 (n = 6-10 per site) and pre-spawn fish in March 2008 (n = 13 per site). Post-spawn fish were characterized by regressed testes whereas pre-spawn bass had full-grown …

Surface Water Monitoring For Fecal Indicator Bacteria In High-Use Sites Of The Lake Mead National Recreation Area, Patricia Cruz, Vanessa Stevens, Jessie Rinella

Lake Mead Science Symposium

The Lake Mead National Recreation Area incorporates 1.5 million acres, including Lake Mead and Lake Mohave. The abundance of recreational activities on Lakes Mead and Mohave can impact the contaminant levels in the water, potentially affecting the health of individuals in contact with the water. The purpose of this study was to review and synthesize information obtained for projects conducted by partner agencies from the Water 2025 Conservation Initiatives, specifically bacterial concentration in high-use areas. Surface water samples were collected between May and September, at 9 high-use sites from 2003 to 2007. Culture analysis was performed to determine the concentration …

Diversity Of Estrogen Degrading Microorganisms In Las Vegas Wash And Lake Mead, Nevada, Usa, Susanna Blunt, Jim Bruckner, Jenny C. Fisher, Duane P. Moser

Lake Mead Science Symposium

Endocrine disrupting chemicals (EDCs) are a subject of intense research as more studies reveal their persistence in the environment and detrimental effects on wildlife. Steroid hormones, including the natural and synthetic estrogens estrone (E1), 17-beta-estradiol (E2) and 17- alpha-ethinyl estradiol (EE2), are among the most bioactive and have been detected at low concentrations in waterways downstream from wastewater treatment plants. Las Vegas Wash, a stream flowing into Lake Mead and fed primarily by treated wastewater, provides a unique experimental system in which to study the role microorganisms play in the fate and dispersal of these compounds in surface waters.

Lake Mead Science Symposium, January 13 An 14, 2009, Las Vegas, Nevada: Program, Kent Turner

Lake Mead Science Symposium

Conference program for the 2009 Lake Mead Science Symposium. Includes abstracts of presentations, registration packet, exhibitor and sponsor information.

Lake Mead Symposium Plenary Schedule, Kent Turner

Lake Mead Science Symposium

Preliminary schedule for the symposium.

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Covering October 6, 2008 – January 5, 2009, Margaret N. Rees

Anti-littering Programs

• Douglas Joslin has resigned from his Project Manager position

• Zia Engineering submits draft report

• GIS project meetings lead to preliminary proposal

• HECTOR announced as the winning name in the name the mascot contest

• Five clean-up events conducted this quarter

• Team provides 619 cubic yards of roll-off space for clean-ups

Andy Nuñez: His Life, Career, & Contributions, Bridgette Burbank, Jerold Widdison

Water Matters!

For years and years, reaching back well before his time in the Legislature, Rep. Nuñez has been a strong advocate not only for the state’s people but for its land and water resources.

Metal Concentrations In Native Yupik Foodstuffs From St. Lawrence Island, Alaska, Judith Kricheff

Geology Theses and Dissertations

The Yupik people of St. Lawrence Island, Alaska have a traditional subsistence lifestyle with the majority of their diet consisting of local birds, fish, seal, walrus, and whale. Diets based on fish and marine mammals, such as the Yupik diet, are potential pathways for exposure to mercury and other toxic metals. At St. Lawrence Island, metal contaminants may come from local sources such as weathered rock or two abandoned U.S. military bases or remote sources through atmospheric deposition or seasonal migration of animals to the island.
The main goals of this study are to determine the total concentrations of copper …

Interactions: Newsletter Of The Wildlife Society Wildlife Damage Management Working Group, Interactions: Volume 15 Issue 4 Fall 2009

TWS Wildlife Damage Management Working Group Newsletter

Letters From Gary Get Involved With The Standing Committees Of The Wdmwg; Take Action To Influence Wildlife Policy; Conference Announcement 2010 Wild Pig Conference; Conference Announcement 24th Vertebrate Pest Conference; Human-Wildlife Conflicts Journal To Become Human wildlife Interactions; Notes From The Field Catching The Skunk Is The Easy Part….; New Video Netted Cage Traps For Deer: Tips And Techniques; The Wildlife Society Wildlife Damage Management Working Group; Upcoming Meetings, Conferences, And Events; Congratulations To New Board Members

Newsletter Of The Wildlife Society Wildlife Damage Management Working Group Interactions: Volume 15 Issue 3 Summer 2009

TWS Wildlife Damage Management Working Group Newsletter

And Now…A Word From The Editor Letters from Joe; Conference Announcement 2010 Wild Pig Conference; Conference Announcement 24th Vertebrate Pest Conference; Latest and Next Issue Of Human Wildlife Conflicts; Conference Announcement Bird Strike North American Conference; Candidate for Board Member David Drake, Mike Mengak, Scott C. Barras, Jay Boulanger, Jason Sukow; How Do I Vote?!?; WDM Working Group Meeting; Conference Announcement TWS Conference Preliminary Program; The Wildlife Society Wildlife Damage Management Working Group; Upcoming Meetings, Conferences, And Events;

Influence Of Aperture Field Heterogeneity And Anisotropy On Dispersion Regimes And Dispersivity In Single Fractures, Qinghuai Zheng, Sarah E. Dickson, Yiping Guo

Sarah E Dickson

A 33 factorial experimental design was implemented to numerically investigate the interactive effect of the mean (μ b ), standard deviation (σ b ), and anisotropic ratio (AR) (λ b x /λ b y ) of single-fracture apertures on dispersion regimes (specifically Taylor dispersion and geometric dispersion) and dispersivity. The Reynolds equation was solved to obtain the flow fields in each computer-generated fracture, and the random walk particle tracking method was used to simulate solute transport. The simulation results show that (1) for a fixed hydraulic gradient, the dominant dispersion regime is controlled by μ b , and to a …

Differential Transport And Dispersion Of Colloids Relative To Solutes In Single Fractures, Qinghuai Zheng, Sarah E. Dickson, Yiping Guo

Sarah E Dickson

This work employed numerical experiments simulating colloid and solute transport in single parallelplate fractures, using the random walk particle tracking method, to demonstrate that (1) there exists an aspect ratio of the colloid radius to half the fracture aperture, do, where the average velocities of colloids and solutes are similar. When d > do, the velocity distribution assumption is satisfied, and the fact that the ratio of the colloid transport velocity to the solute transport velocity, sp, decreases as d increases is well documented in the literature. However, when d < do, the velocity distribution assumption is violated, and sp increases as d increases and (2) the Taylor dispersion coefficient and its extension by James and Chrysikopoulos [S.C. James, C. V. Chrysikopoulos, J. Colloid Interface Sci. 263 (2003) 288] will overestimate the colloid dispersion coefficient significantly. Additionally, numerical experiments simulating colloid and solute transport in variable-aperture fractures demonstrated that sp and DL,coll /DL,solute decrease with increasing CoV, and the anisotropy ratio only plays a minor role compared to the CoV. These observations have important implications towards the interpretation of colloid transport in both porous and fractured media.

Scwds Briefs: Volume 24, Number 4 (January 2009), Gary L. Doster , Editor, Scwds Briefs, Michael J. Yabsley

Southeastern Cooperative Wildlife Disease Study: Publications

Table of Contents:

HD in 2007: A Year to Remember

Ecology of AIV in Shorebirds

New USDA Brucellosis Proposal

TWS Seeks Comments on Draft Lead Policy

Unusual Eagle Death

New SCWDS Grad Students

Tennessee Director Retiring

3rd International CWD Symposium

Another SCWDS Student Award

Symbiotic Effects Of The Fungus Glomus Sp. On Chromium(Iii), Chromium(Vi), And Lead(Ii) Uptake By Mesquite (Prosopis Sp.): A Novel Method To Remediate Heavy Metals, Jack A. Arias

Open Access Theses & Dissertations

The indiscriminate disposal of lead (Pb) and chromium (Cr) containing wastes has resulted in a detrimental impact on environmental health. Lead and Cr are in the EPA priority list due to their degree of toxicity on humans, animals, plants, and other living organisms. The removal of toxic wastes involves technologies that are expensive, sometimes incomplete, and could represent health hazards. In addition, site restoration after contaminant removal encompasses time and technological resources. Phytoremediation, the use of plants alone or associated with microorganisms, represents a potentially cost-effective option in the long term management of contaminated sites. Various plants known as "hyperaccumulators" …

Refuge Update – January/February 2009, Volume 6, Number 1

RefugeUpdate (USFWS-NWRS)

Table of Contents:
Fresh Thinking About Climate Change, page 3
Meet the New Refuge Chief, page 5
Focus on . . . Research on Refuges, pages 8-13
Drive. Dial. Discover., page 14

Mitigation Under Section 404 Of The Clean Water Act: Where It Comes From, What It Means, Palmer Hough, Morgan Robertson

United States Environmental Protection Agency: Publications

The requirement to mitigate impacts to wetlands and streams is a frequently misunderstood policy with a long and complicated history. We narrate the history of mitigation since the inception of the Clean Water Act Section 404 permit program in 1972, through struggles between the US Environmental Protection Agency and the US Army Corps of Engineers, through the emerging importance of wetland conservation on the American political landscape, and through the rise of market-based approaches to environmental policy. Mitigation, as it is understood today, was not initially foreseen as a component of the Section 404 permitting program, but was adapted from …

Newsletter Of The Wildli Fe Society Wildlife Damage Management Working Group Interactions: Volume 15 Issue 2 Spring 2009

TWS Wildlife Damage Management Working Group Newsletter

The Wildlife Damage Management Meeting Was A Success! Letters From Gary; A Brief Report from the Wildlife Damage Management Conference; Two New Publications Available Dominion Over Wildlife Fifth Eastern Wdm Conference; Conference Announcement Tws Conference Preliminary Program; Workshop Announcement Deer Damage Management Workshop; Call for Papers Special Issue of Human-Wildlife Conflicts To Focus On the Management of North American Geese; Conference Announcement Bird Strike North American Conference; Calls from the Field (Or A House, Or A Farm, Or A…); Conference Announcement 24th Vertebrate Pest Conference; Call for Papers 24th Vertebrate Pest Conference; Recent Wildlife Damage Management Research; The Wildlife Society …

Newsletter Of The Wildlife Society Wildlife Damage Management Working Group Interactions: Volume 15 Issue 1 Winter 2009

TWS Wildlife Damage Management Working Group Newsletter

See You In Saratoga! Letters from Gary; A Brief Report from The WDMWG Meeting and the 2008 TWS Annual Conference; New Product Announcement Backyard Wildlife: Vole Control And Ground Squirrel Management Dvd; Publication Announcement Latest Issue of Human Wildlife Conflicts Is Now Available; Conference Announcement Bird Strike North American Conference; Conference Announcement TWS Conference Preliminary Program; New Publication Available 23rd Vertebrate Pest Conference Proceedings; Calls from the Field (Or A House, Or A Farm, or A…); 2009 Wildlife Damage Management Conference Preliminary Schedule; 2009 Wildlife Damage Management Conference Registration Information; The Wildlife Society Wildlife Damage Management Working Group; Upcoming Meetings, …

State Of The River Report For Toxics, Bradley Carter

Environmental Science and Management Professional Master's Project Reports

The United States Environmental Protection Agency (EPA) strives to prevent pollution, protect water quality and improve ecosystems in order to reduce risks to human health and the environment. As outlined in the Agency’s Strategic Plan, the Columbia River Basin was identified as a "National Priority" and designated as one of our nation’s seven "Large Aquatic Ecosystems". This designation grants legislative status equal to the Chesapeake Bay, Great Lakes, Gulf of Mexico, South Florida Ecosystem, Long Island Sound and Puget Sound. The Strategic Plan is the Agency’s road map of future work efforts, and targets specific goals that are expected to …

Florida Bash: An Integrated Management Approach From The Ground Up, Marty Daniel, Charles Kara, John Fontenot, Jerry Hairston, Bernice Constantin, Anthony Duffiney, John Dunlop

Bird Strike Committee-USA/Canada Joint Annual Meeting: 10th (2008)

Florida harbors numerous bird and mammal species because of its rich diversity of both natural and man-made habitats that provide ample food, water, and cover throughout the year. This diversity has led to numerous wildlife/aircraft strikes resulting in significant monetary losses for the U.S. Air Force (USAF). Despite diminishing budgets, recurrent turnover of base personnel,, and shifting priorities, Wildlife Services has worked successfully with USAF personnel to develop a heightened awareness of BASH issues and effective, proactive BASH programs at three air bases in Florida. Emphasizing the use of accurate data along with proper analysis to form science-based recommendations facilitates …

Integrating Avian Radar Into The Aviation Operating Environment, Richard Sowden, Paul Eschenfelder

Bird Strike Committee-USA/Canada Joint Annual Meeting: 11th (2009)

Avian radar technology has matured to the point where robust data and analysis tools are now able to provide the aviation industry with high quality information to support bird strike risk mitigation activities. The aviation operating environment is dynamic and challenging with complex interactions between the primary bird strike risk mitigation stakeholders; airport operators, air traffic service providers and flight crews. The transfer of this proof of concept technology into a suite of tools that is integrated into the aviation industry requires the engagement and support of the user community in the next critical evolutionary step of this emerging technology. …

Successful Strategies For Aviation Wildlife Mitigation, Paul Eschenfelder

Bird Strike Committee-USA/Canada Joint Annual Meeting: 11th (2009)

Between October, 2007 and January, 2009 there were four catastrophic aircraft accidents in the United States caused by collisions between birds and aircraft. Four aircraft were destroyed and 15 people killed in these accidents. In North America we place great importance on airport wildlife control, however none of these accidents would have been prevented by improved airport wildlife control. This reveals a gap in our safety management plan for preventing/reducing wildlife hazards to aircraft. This paper explains, using case studies, successful aviation mitigation methodologies used in the past to mitigate other aviation hazards such as wind shear, volcanic ash, winter …

2009 Bird Strike North America Conference Program

Bird Strike Committee-USA/Canada Joint Annual Meeting: 11th (2009)

Bird Strike Committee Canada and Bird Strike Committee USA are very pleased to welcome you to the 2009 Bird Strike North America Conference in Victoria, British Columbia. This is the eleventh combined meeting of Bird Strike Committee USA and Bird Strike Committee Canada. This year there are over 41 papers in 9 technical sessions, as well as exhibitor displays and posters. There will also be lots of time to reconnect with old friends and colleagues and to meet new ones. We hope you enjoy the conference sessions, the special events and your stay in the beautiful city of Victoria.

Raptors, Rodents And Rare Weather: Managing Increased Migratory Raptor Populations At Mcconnell Afb, Kansas, Lauren Caister

Bird Strike Committee-USA/Canada Joint Annual Meeting: 11th (2009)

Migratory raptor populations at McConnell Air Force Base in Kansas, increased dramatically in the 2008-2009 winter season, with more than a 200% increase in the number of large hawks observed on the airfield, compared to equivalent seasons in the past 3 years. This increase resulted in frequent interruptions and/or cessations of flying operations.

The primary cause was determined to be a local explosion of both Hispid Cotton Rats (Sigmodon hispidus) and Prairie Voles (Microtus ochrogaster). The cotton rat explosion was a result of record-breaking rainfall in 2008, while the explosion of voles followed the natural 3-5 …

Could Avian Radar Have Prevented Us Airways Flight 1549’S Bird Strike?, Tim Nohara

Bird Strike Committee-USA/Canada Joint Annual Meeting: 11th (2009)

The heroic ditching in the Hudsn River of US Airay’s Flight 1549 following multiple bird strikes with Canada geese has increased public awareness of bird aircraft strike hazards (BASH); and has focused attention on new tools such as avian radar to help further improve aviation safety. Reports in the media have suggested that had avian radars been deployed at LaGuardia, this bird strike could have been avoided. Indeed, there is mounting evidence supporting existing avian radar’s ability to provide wildlife control and air operations personnel with greatly improved bird situational awareness which can be used to reduce bird hazards around …

Large Air Transport Jet Engine Design Considerations For Large And For Flocking Bird Encounters, Christopher Demers

Bird Strike Committee-USA/Canada Joint Annual Meeting: 11th (2009)

The history, efforts, and accomplishments of everyone involved in understanding and mitigating the threat of birds to aircraft came under intense public scrutiny when US Airway’s Flight 1549 splashed down in the Hudson River on January 15, 2009.

Largely absent from the recent public discussion about bird threats is the time, labor, and resources that industry invests in continuously learning, developing, and incorporating features into aircraft designs to mitigate the consequences of bird strikes. Pratt & Whitney, as a designer and manufacturer of jet engines for a variety of aircraft, including large commercial transport aircraft, is an integral part of …

Geoelectrical Response Of Surfactant Solutions In A Quartzitic Sand Analog Aquifer, Meghan Therese Magill

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this project, the resistivity and phase shift of ten surfactant aqueous solutions in a sand matrix were measured using spectral induced polarization (SIP). In addition, specific conductivity, pH, dissolved oxygen, and dielectric constant measurements of the solutions were also evaluated. The frequency range assessed was 0.091-12000Hz. The surfactants, which are typically used in the remediation of tetrachloroethylene, were Aerosol MA 80-I, Dowfax 8390, and Steol CS-330. The surfactants were mixed into solutions of both deionized and tap water at varying concentrations and injected into a closed system of silica sand. The surfactant treatments altered resistivity, specific conductivity, and pH …

An Evaluation Of Lead Hazards In Pre-1978 Residental Housing Within Clark County, Nevada, Usa, Erika Raquel Torres

UNLV Theses, Dissertations, Professional Papers, and Capstones

Lead poisoning remains a public health concern due to leads persistence in the environment from anthropogenic uses. Initial efforts to address the impacts of lead on vulnerable communities have included secondary prevention measures which typically occur after a child has been poisoned. However, in recent years there has been a pragmatic shift toward primary prevention efforts.

This study evaluates lead hazards identified through primary prevention activities in residential housing within Clark County, Nevada, USA. It is the first study to systematically address and evaluate pre-1978 housing in Southern Nevada. Risk assessments were conducted in 81 dwellings built prior to 1979 …

The Environment And Climate Change: Is International Migration Part Of The Problem Or Part Of The Solution?, Howard F. Chang

All Faculty Scholarship

No abstract provided.

The Problem With Particularized Injury: The Disjuncture Between Broad-Based Environmental Harm And Standing Jurisprudence, Hope M. Babcock

Georgetown Law Faculty Publications and Other Works

Several recent events harmonically converged into the topic for this article. The first was a posting on Georgetown Law’s environmental law professors’ listserv by Professor John Bonine, which raised a number of questions about whether and how standing doctrine might be rethought in light of the Supreme Court’s opinion in Massachusetts v. EPA. That opinion relaxed the states’ standing burden because of the unique sovereign interests, finding that federalism bargaining earned states “special solicitude” when it came to meeting the Court’s standing requirements.

The second was a complaint filed by a consortium of regional environmental organizations, Chesapeake Bay Foundation, …