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Environmental Sciences

2004

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Articles 1 - 30 of 163

Full-Text Articles in Life Sciences

Atrazine Runoff In The Blue River Basin: Geomorphology, Rainfall, And Agronomic Practices, Kundan Dhakal Dec 2004

Atrazine Runoff In The Blue River Basin: Geomorphology, Rainfall, And Agronomic Practices, Kundan Dhakal

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Atrazine concentrations in the Big Blue River Basin (BRB) in Nebraska and Kansas periodically exceed the U.S. EPA Maximum Contaminant Level (MCL) of 3 µg L-1. The present study is focused on watershed variables influencing surface runoff of atrazine. The assessment includes the impact of corn and sorghum planting progress (indicating atrazine application), rainfall, antecedent soil water content, and soil restrictive layer on stream-measured weekly atrazine load in independent BRB subwatersheds for 1997 - 2004. Maximum atrazine loading occurred after most of the corn had been planted but during sorghum planting from mid-May to early June, immediately following multiple ...


Introduction To The Legal Foundation Of Federal Land Management, University Of Colorado Boulder. Natural Resources Law Center Dec 2004

Introduction To The Legal Foundation Of Federal Land Management, University Of Colorado Boulder. Natural Resources Law Center

Introduction to the Legal Foundation of Federal Land Management (December 1-3)

1 v. (various pagings) : ill., maps ; 28 cm

Materials prepared for the course held at the National Center for Atmospheric Research in Boulder, Colorado on December 1-3, 2004

Course instructors: Charles Wilkinson; Sarah Krakoff; Kathryn Mutz; Ann Morgan; Maggie Fox

Contents:

Introduction -- Agenda -- Summaries of laws -- Case studies. Travel management; Oil and gas development; Timber/fuels reduction -- How to influence agency decision makers -- Natural resource related legal and policy resources for the non-legal professional


Agenda: Introduction To The Legal Foundation Of Federal Land Management, University Of Colorado Boulder. Natural Resources Law Center Dec 2004

Agenda: Introduction To The Legal Foundation Of Federal Land Management, University Of Colorado Boulder. Natural Resources Law Center

Introduction to the Legal Foundation of Federal Land Management (December 1-3)

Materials prepared for the course held at the National Center for Atmospheric Research in Boulder, Colorado on December 1-3, 2004

Course instructors: Charles Wilkinson; Sarah Krakoff; Kathryn Mutz; Ann Morgan; Maggie Fox

Contents:

Introduction -- Agenda -- Summaries of laws -- Case studies. Travel management; Oil and gas development; Timber/fuels reduction -- How to influence agency decision makers -- Natural resource related legal and policy resources for the non-legal professional


Nitrogen And Phosphorus Budgets For Iowa And Iowa Watersheds, Robert D. Libra, C. F. Wolter, R. J. Langel Dec 2004

Nitrogen And Phosphorus Budgets For Iowa And Iowa Watersheds, Robert D. Libra, C. F. Wolter, R. J. Langel

Technical Information Series

No abstract provided.


The Other Side Of Silence: Rachel Carson’S Views Of Animals, Marc Bekoff, Jan Nystrom Dec 2004

The Other Side Of Silence: Rachel Carson’S Views Of Animals, Marc Bekoff, Jan Nystrom

Animal Welfare Collection

The publication of Rachel Carson’s Silent Spring in 1962 is widely regarded as one of the major events that launched the modern environmental movement. Silent Spring is a compelling blend of stories, natural history, human values, and biological facts. In this essay we consider Carson’s attitude toward animals in Silent Spring and in other texts. Despite the facts that she was raised to love Nature and animals, little direct attention has been given to Carson’s views about our moral responsibilities to, and the moral standing of animals. Carson favored responsible stewardship, was more of an animal welfarist ...


Meeting The Scientific Needs Of Ecological Risk Assessment In A Regulatory Context, Steven P. Bradbury, Tom C. Feitel, Cornelis J. Van Leeuwen Dec 2004

Meeting The Scientific Needs Of Ecological Risk Assessment In A Regulatory Context, Steven P. Bradbury, Tom C. Feitel, Cornelis J. Van Leeuwen

Steven P. Bradbury

During the past decade, the field of ecological risk assessment has progressed considerably. Advances have come from such international bodies as the Organisation for Economic Co-operation and Development (OECD), the World Health Organisation (WHO), the European and Mediterranean Plant Protection Organisation (EPPO), and the European Centre for Ecotoxicology and Toxicology of Chemicals (ECETOC) (1–8). Risk assessments have played a critical role in the development of various regulations within the European Commission (EC) as well as in other parts of the world, including the United States, Canada, and Japan (9–17). But scientists and regulators are faced with three significant ...


South East Humps Focus Catchment Report, A Hollick Dec 2004

South East Humps Focus Catchment Report, A Hollick

Resource management technical reports

This report provides a record of the activities carried out by the Lockhart Focus Support Team and the Catchment Group. It covers the results of the investigations and a summary of the group's catchment plan for the South East Humps Catchment east of Hyden in Western Australia. It covers the current best available information on soils, groundwater hydrology, surface water control, alternative crops and pastures, and revegetation options.


Wetland And Nest Scale Habitat Use By The Four-Toed Salamander (Hemidactylium Scutatum) In Maine, And A Comparison Of Survey Methods, Rebecca J. Chalmers Dec 2004

Wetland And Nest Scale Habitat Use By The Four-Toed Salamander (Hemidactylium Scutatum) In Maine, And A Comparison Of Survey Methods, Rebecca J. Chalmers

Electronic Theses and Dissertations

Conserving amphibian populations requires knowledge of a species and its habitat relationships. The four-toed salamander (Hemidactylium scutatum) is listed as Special Concern in Maine and 11 additional states and provinces, Threatened in Illinois, and Endangered in Indiana (Appendix A). Little is known of H. scutatum ecology despite the species' extensive range. Infrequent sightings of H. scutatum throughout its range may indicate either low numbers or that the species' behavior make detection difficult. Records for H. scutatum in Maine existed from only 32 sites before my study, and the total number of occurrences of this species in Maine is unknown (P ...


Chemical And Toxicological Characterization Of The Upper York River, Virginia The Mattaponi And Pamunkey Rivers, Morris H. Roberts Jr., Mark Richards, Peter F. Delisle Dec 2004

Chemical And Toxicological Characterization Of The Upper York River, Virginia The Mattaponi And Pamunkey Rivers, Morris H. Roberts Jr., Mark Richards, Peter F. Delisle

Reports

This study describes the most extensive effort to characterize the chemistry, toxicology and community of the sediments of the Mattaponi and Pamunkey Rivers. This was accomplished using a study design modified to expand the number of stations occupied by reducing the cost of analyses by compositing replicate samples collected from each study site rather than performing toxicity tests on these samples individually. In previous studies, the variability in field replicate samples was equivalent to the variability in laboratory replicates. This design has long been used to analyze samples for various chemical contaminants as a cost savings endeavor. More ....


Education In The Environment: A Hands-On Student Research And Outdoor Learning Experience: Quarterly Progress Report, Period Ending November 30, 2004, Margaret N. Rees Nov 2004

Education In The Environment: A Hands-On Student Research And Outdoor Learning Experience: Quarterly Progress Report, Period Ending November 30, 2004, Margaret N. Rees

Reports (PLI Education)

During the past three-months, the focus of the university’s efforts has been 1) making progress on the hiring of permanent project managers for the Education in the Environment Strategy and the Forever Earth / Wonderful Outdoor World on the Water (WOW) projects; 2) completing legal review of the cooperative agreement and standard operating procedures required for the university to assume operations of the Forever Earth vessel; and 3) writing curriculum for the WOW and Forever Earth projects.


Evaluation Of Striped Bass Stocks In Virginia : Monitoring And Tagging Studies, 2004-2008 Annual Report 1 September 2003 - 31 August 2004, Philip W. Sadler, John M. Hoenig, Robert E. Harris, Bonnie G. Holliman Nov 2004

Evaluation Of Striped Bass Stocks In Virginia : Monitoring And Tagging Studies, 2004-2008 Annual Report 1 September 2003 - 31 August 2004, Philip W. Sadler, John M. Hoenig, Robert E. Harris, Bonnie G. Holliman

Reports

This report presents the results of striped bass (Marone saxatilis) tagging and monitoring activities in Virginia during the period 1 August 2003 through 31 August 2004. It includes an assessment of the biological characteristics of striped bass taken from the 2004 spring spawning run, estimates of annual survival based on annual spring tagging, and the results of the fall 2003 directed mortality study that is a collaborative effort with the Maryland Department ofNatural Resources. The information contained in this report is required by the Atlantic States Marine Fisheries Commission and is used to implement a coordinated management plan for striped ...


Red Rock Desert Learning Center Core Group Meeting: November 16, 2004, Red Rock Desert Learning Center Nov 2004

Red Rock Desert Learning Center Core Group Meeting: November 16, 2004, Red Rock Desert Learning Center

Reports (RRLC)

  1. Introductions (5 min.)
  2. Approval of Minutes from October 19 Meeting (5 minutes)
  3. Presentation of Biology Curriculum Strands – Paul Buck (15 min.)
  4. Discussion of Possible Advisory Board Structures – Michael Reiland (15 min.)
  5. Update from Line and Space Architects – Les Wallach/Henry Tom (20 min.)
  6. Discussion of Student Risk Analysis/Liability Issues (15 min.)
  7. Standing Reports (10 minutes)
    A. UNLV/CESU Update – Nancy Flagg
    B. BLM Update – Michael Reiland
  8. Committee Reports (5 min.)
    A. Building Committee – Angie Lara
  9. Open Discussion / New Business (5 min.)
    A. January Meeting – Tuesday, January 18, 10:30 a.m., UNLV Paradise
    Campus
    B. Core Curriculum Handout


South Yarding Focus Catchment Report, A Hollick Nov 2004

South Yarding Focus Catchment Report, A Hollick

Resource management technical reports

This report provides a record of the activities carried out by the South Yarding Focus Support Team and Catchment Group. It covers the results of investigations and summarises the group's catchment plan of South Yarding, Western Australia, based on the best available information on soils, groundwater hydrology, surface water control, alternative crops and pastures and revegetation options.


Soil-Landscape Mapping In South-Western Australia : An Overview Of Methodology And Outputs, B R. Purdie, Peter J. Tille, Noel R. Schoknecht Nov 2004

Soil-Landscape Mapping In South-Western Australia : An Overview Of Methodology And Outputs, B R. Purdie, Peter J. Tille, Noel R. Schoknecht

Resource management technical reports

This report provides an overview of the soil-landscape mapping program for south-Western Australia. It outlines the techniques and standards used in describing the soil-landscape as well as the outputs of the mapping program and their uses.


Carbon Sequestration, Co-Benefits, And Conservation Programs, Hongli Feng, Catherine L. Kling, Philip W. Gassman Nov 2004

Carbon Sequestration, Co-Benefits, And Conservation Programs, Hongli Feng, Catherine L. Kling, Philip W. Gassman

CARD Working Papers

Land use changes to sequester carbon also provide "co-benefits," some of which (for example, water quality) have attracted at least as much attention as carbon storage. The non-separability of these co-benefits presents a challenge for policy design. If carbon markets are employed, then social efficiency will depend on how we take into account co-benefits, that is, externalities, in such markets. If carbon sequestration is incorporated into conservation programs, then the weight given to carbon sequestration relative to its co-benefits will partly shape these programs. Using the Conservation Reserve Program (CRP) as an example, we show that CRP has been sequestering ...


Red Rock Desert Learning Center Core Group Meeting: October 19, 2004, Red Rock Desert Learning Center Oct 2004

Red Rock Desert Learning Center Core Group Meeting: October 19, 2004, Red Rock Desert Learning Center

Reports (RRLC)

  1. Introductions (5 min.)
  2. Approval of Minutes from September 21 Meeting (5 minutes)
  3. Review & Discussion of Suggested Core Curriculum Themes – Jeanne Klockow/Michael Reiland (20 min.)
  4. Update from Line and Space Architects – Les Wallach/Henry Tom (20 min.)
  5. Standing Reports (20 minutes)
    A. UNLV/CESU Update – Nancy Flagg
    C. BLM Update – Michael Reiland
  6. Committee Reports (10 min.)
    A. Building – Angie Lara
    B. Design Oversight – David Frommer
    C. Educational Programs – Paul Buck
    D. Fund-Raising & Partnerships – Blaine Benedict
    E. NEPA – Charles Carroll
    F. Operations – Jack Ramsey
    G. Other Uses – Pat Williams
    H. Wild Horse & Burro – Billie Young
  7. Open Discussion / New Business (5 min ...


Cropland Cash Rental Rates In The Upper Mississippi River Basin, Lyubov A. Kurkalova, Christopher Sean Burkart, Sylvia Secchi Oct 2004

Cropland Cash Rental Rates In The Upper Mississippi River Basin, Lyubov A. Kurkalova, Christopher Sean Burkart, Sylvia Secchi

CARD Technical Reports

The report documents the creation of estimates for cropland cash rental rates in the Upper Mississippi River Basin in 1997. Although the basic data come from disparate sources, we employ a unifying estimation procedure based on the presumption that the cropland cash rental rate is an increasing function of corn yield potential. The rates are estimated at some 42,000 National Resources Inventory data points representing cropland in Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, South Dakota, and Wisconsin.


Leopold Letter Fall 2004, Leopold Center For Sustainable Agriculture Oct 2004

Leopold Letter Fall 2004, Leopold Center For Sustainable Agriculture

Leopold Letter

Leopold Center grant leads to new fertilizer technology ; Ecology initiative launches 17 new projects ; Director column: Challenges come home to roost ; Trends in Iowa farmland ownership will change landscape ; Hoops prove their worth ; From the field: Dick and Sharon Thompson ; Spencer Award presented at Iowa State Fair ; Farmers learn how to grow markets as well as products


Reducing Nutrient Discharge From Agriculture Through The Implementation Of Bmps – How Far Can We Go?, David Weaver, Simon Neville, Robert Summers, Martin Clarke Oct 2004

Reducing Nutrient Discharge From Agriculture Through The Implementation Of Bmps – How Far Can We Go?, David Weaver, Simon Neville, Robert Summers, Martin Clarke

Conference papers and presentations

Algal blooms in south west Western Australia are a symptomatic response to excess nutrient input. Whilst a range of Best Management Practices (BMPs) are available to address the causes of nutrient pollution, most investment has been directed towards symptoms. In order to treat nutrient pollution causes effectively it is important to evaluate possible nutrient reductions and costs, and to determine whether accrued benefits can influence BMP adoption. Models were developed for catchments near Albany (south coast of Western Australia), and for the Peel-Harvey catchment (70 km south of Perth) to estimate costs and benefits of implementing conventional BMPs in scenarios ...


Wetland Basins For Saline Drainage Water Disposal Bodallin And Elachbutting Catchments, Eastern Wheatbelt, Western Australia, P De Broekert, N Coles Oct 2004

Wetland Basins For Saline Drainage Water Disposal Bodallin And Elachbutting Catchments, Eastern Wheatbelt, Western Australia, P De Broekert, N Coles

Resource management technical reports

This report provides an assessment of two large deep drainage schemes within the lower reaches of the Bodallin and Elachbutting Catchments nearby Merredin in Western Australia, wherein groups of isolated wetland basins have been utilised for evaporative saline drainage water disposal. In both cases, the storage capacity of the basins has been exceeded, leading to flooding and death of the surrounding native vegetation.


Subterranean Loss And Gain Of Water In Mountain Lake, Virginia: A Hydrologic Model, Martin Jansons, Bruce C. Parker, Jacob E. Waller Oct 2004

Subterranean Loss And Gain Of Water In Mountain Lake, Virginia: A Hydrologic Model, Martin Jansons, Bruce C. Parker, Jacob E. Waller

Virginia Journal of Science

Mountain Lake, Virginia is a small, unique, oligotrophic, subalpine ecosystem in the southern Appalachians. Previous studies have disclosed that this lake has manifested periodic prolonged low water levels during the several thousand years of its existence. The most recent low water level occurred during the drought years of 1999-2002. Measurements of lake level, precipitation, and other meteorological data including calculated evapotranspiration in the lake basin from 2/19/02 to 8/31/03 have enabled estimation of net subterranean water losses presumably through cracks between Clinch sandstone boulders and/or the recently discovered deep hole at the northwest end of ...


The Crest, Fall 2004, Virginia Institute Of Marine Science Oct 2004

The Crest, Fall 2004, Virginia Institute Of Marine Science

Reports

Table of Contents:

  • NOAA Opens Chesapeake Bay Office in Virginia at VIMS
  • Team discovers probable cause of croaker deaths
  • Researchers test and refine storm-surge models
  • Dye helps predict potential dispersal of non-native oyster larvae
  • Researchers release juvenile blue crabs
  • Annual wetlands workshop explores Isabel's impacts
  • Fellows earn berth at EPA Conference
  • Reay and Priest share Spirit award
  • Schaffner briefs U.S. Congress
  • VIMS student develops educational board game
  • VIMS hosts release of Fisheries Ecosystem plan
  • Researchers study ocean's "internal weather"
  • VIMS mourns passing of Andrews
  • News Briefs


Red Rock Desert Learning Center Core Group Meeting: September 21, 2004, Red Rock Desert Learning Center Sep 2004

Red Rock Desert Learning Center Core Group Meeting: September 21, 2004, Red Rock Desert Learning Center

Reports (RRLC)

  1. Introductions (5 min.)
  2. Approval of Minutes from August 17 Meeting (5 minutes)
  3. Potential Tie-in with City of Las Vegas New Directions YouthArts Program –
    Markus Tracy (20 min.)
  4. Presentation of Education in the Environment Curriculum Matrix and correlation to
    RRDLC curriculum development – Jeanne Klockow (30 min.)
  5. Discussion of Policy-making Board for the Center – Michael Reiland (15 min.)
  6. Discussion of Observatory Location – Michael Reiland (25 min.)
  7. Standing Reports (20 minutes)
    A. Line and Space Architects Update – Les Wallach/Henry Tom
    B. UNLV/CESU Update – Nancy Flagg
    C. RRCNCA Capital Improvements Update – BLM
  8. Committee Reports (10 min.)
    A. Building – Angie Lara
    B. Design ...


Education In The Environment Partnership, Public Lands Institute Sep 2004

Education In The Environment Partnership, Public Lands Institute

Presentations (PLI Education)

  • Update on Oliver Ranch
  • Update on Forever Earth
  • Update on WOW on the Water


Trends In Mirex Concentration In Lake Ontario Salmonines And Sediments, Hilary L. Richardson Sep 2004

Trends In Mirex Concentration In Lake Ontario Salmonines And Sediments, Hilary L. Richardson

Environmental Science and Ecology Theses

Chinook (Oncorhynchus kisutch) and coho (0. tshawytscha) salmon and sediment cores collected from Lake Ontario during the summer and fall of 2003 were subsequently analyzed for mirex and photomirex. Mirex in fish tissue ranged from 0.011 mg/kg to 0.094 mg/kg (mean 0.048 mg/kg). Photomirex in fish ranged from 0.005 mg/kg to 0.045 mg/kg (mean 0.020 mg/kg). Analysis of variance (ANOVA) was performed to test for differences between mirex concentrations among all sampling years. A significant difference occurred between all sampling years (p=0.000). Temporal trends ...


Supply Chain Options For Biobased Businesses, Rhonda R. Lummus Sep 2004

Supply Chain Options For Biobased Businesses, Rhonda R. Lummus

Leopold Center Publications and Papers

This paper investigates supply chain business relationships that would be appropriate for biobased businesses. It is a final report from the Leopold Center Marketing Initative project M13-2004.


Technical Assessment Of Natural Resource Management Threats And Options In The Northern Agricultural Region Of Western Australia, Lorinda Hunt, G Patterson, Northern Agricultural Catchments Council (Wa) Sep 2004

Technical Assessment Of Natural Resource Management Threats And Options In The Northern Agricultural Region Of Western Australia, Lorinda Hunt, G Patterson, Northern Agricultural Catchments Council (Wa)

Resource management technical reports

Analysis of the risk of soil, land and water degradation within the Northern Agricultural Region of Western Australia. Natural resource issues discussed include: acid groundwater, acid sulfate soils, climate change, dryland salinity, flooding, herbicide resistance, non-wetting (water repellence), nutrient loss and eutrophication, remnant vegetation decline, soil acidity, soil fertility decline, soil structure decline, subsurface compaction, waterlogging, wind erosion and soil contamination.


Altered Hydrologic Feedback In A Warming Climate Introduces A “Warming Hole”, Zaitao Pan, Raymond W. Arritt, Eugene S. Takle, William J. Gutowski Jr., Christopher J. Anderson, Moti Segal Sep 2004

Altered Hydrologic Feedback In A Warming Climate Introduces A “Warming Hole”, Zaitao Pan, Raymond W. Arritt, Eugene S. Takle, William J. Gutowski Jr., Christopher J. Anderson, Moti Segal

Geological and Atmospheric Sciences Publications

In the last 25 years of the 20th century most major land regions experienced a summer warming trend, but the central U.S. cooled by 0.2–0.8 K. In contrast most climate projections using GCMs show warming for all continental interiors including North America. We examined this discrepancy by using a regional climate model and found a circulation-precipitation coupling under enhanced greenhouse gas concentrations that occurs on scales too small for current GCMs to resolve well. Results show a local minimum of warming in the central U.S. (a “warming hole”) associated with changes in low-level circulations that ...


Oliver Ranch Core Group Meeting: August 17, 2004, Red Rock Desert Learning Center Aug 2004

Oliver Ranch Core Group Meeting: August 17, 2004, Red Rock Desert Learning Center

Reports (RRLC)

  1. Introductions (5 minutes)
  2. Approval of Minutes from June 15 Meeting (5 minutes)
  3. Review of Draft Talking Points/FAQ – Nancy Flagg (30 min)
  4. Discussion of Wild Horse and Burro Facility – Billie Young (30 min.)
  5. Standing Reports (30 minutes)
    A. Line and Space Update – Les Wallach/Henry Tom
    B. UNLV/CESU Update – Peg Rees/Nancy Flagg
    C. RRCNRA Capital Improvements Update – Mark Morse/Michael Reiland
  6. ORSS Committee Reports (15 minutes)
    A. Design Oversight – David Frommer
    B. Educational Programs – Paul Buck
    C. Fund-Raising & Partnerships – Blaine Benedict
    D. NEPA – Charles Carroll
    E. Operations – Jack Ramsey
    F. Other Uses – Pat Williams
    G. Wild Horse & Burro ...


The Role Of Pasture In Conservation Management, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman Aug 2004

The Role Of Pasture In Conservation Management, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman

Integrated Crop Management News

Pasture is a longtime and significant part of Iowa agriculture and is a critical component of the state's agricultural landscape. The main function of pasture is as a primary support system for livestock. It can affect conservation and the environmental planning in several ways, including soil carbon storage, soil quality, and water quality. The effect of livestock on such parameters is highly significant depending on the way livestock and pasture are managed. Therefore, pasture management does play an important role in a farming operation's overall conservation management plan.