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Natural Resources and Conservation

2006

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Articles 1 - 24 of 24

Full-Text Articles in Life Sciences

Butterflies And Continuous Conservation Reserve Program Filter Strips: Landscape Considerations, Nicole M. Davros, Diane M. Debinski, Kathleen F. Reeder, William L. Hohman Nov 2006

Butterflies And Continuous Conservation Reserve Program Filter Strips: Landscape Considerations, Nicole M. Davros, Diane M. Debinski, Kathleen F. Reeder, William L. Hohman

Ecology, Evolution and Organismal Biology Publications

Filter strips or buffers are areas of grass or other perennial herbaceous vegetation established along waterways to remove contaminants and sediments from agricultural field runoff. In the heavily cultivated regions of the Midwestern United States, these buffer zones established under the Farm Bill provide important habitat for wildlife such as butterflies. The question of how the landscape context of these plantings influences their use has not been adequately researched. We used multiple regression and Akaike’s Information Criteria to determine how habitat width and several landscape-level factors (i.e., landscape composition [total herbaceous cover, amount of developed area, and amount ...


Ecophysiology Of Two Native Invasive Woody Species And Two Dominant Warm-Season Grasses In The Semiarid Grasslands Of The Nebraska Sandhills, Kathleen D. Eggemeyer, Tala Awada, David A. Wedin, F. Edwin Harvey, Xinhua Zhou Sep 2006

Ecophysiology Of Two Native Invasive Woody Species And Two Dominant Warm-Season Grasses In The Semiarid Grasslands Of The Nebraska Sandhills, Kathleen D. Eggemeyer, Tala Awada, David A. Wedin, F. Edwin Harvey, Xinhua Zhou

Papers in Natural Resources

Populations of Pinus ponderosa and Juniperus virginiana are expanding into semiarid Sandhills grasslands in Nebraska. To evaluate the physiological basis of their success, we measured the seasonal course of leaf gas exchange, plant water status, and carbon isotope discrimination in these two native trees and two native C4 grasses (Schizachyrium scoparium and Panicum virgatum). Compared to the trees, grasses had higher net photosynthetic rates (Anet) and water use efficiency (WUE) and more negative predawn and midday water potentials (Ψ) in June and July. While leaf Ψ and rates of leaf gas exchange declined for all four species during ...


The Growing Together Guide: A Companion Resource To The New England Environmental Finance Center/Melissa Paly Film, New England Environmental Finance Center Sep 2006

The Growing Together Guide: A Companion Resource To The New England Environmental Finance Center/Melissa Paly Film, New England Environmental Finance Center

Smart Growth

What local leader or public official wants to be faced with an SOS the “same old story” of public discord and confrontation over growth and development in one’s community? That situation has become a problem for efforts to promote smart growth. Investments are needed in the walkable, compact, traditional‐streetscape and mixed use neighborhoods and developments that are more sustainable and healthy than sprawl, for both people and the landscape. Yet attempts at such change all too often end up mired in costly public controversy and stalemate.


How Earth Remote Sensing From The International Space Station Complements Current Satellite‐Based Sensors, Jennifer Gebelein, Dean Eppler Jul 2006

How Earth Remote Sensing From The International Space Station Complements Current Satellite‐Based Sensors, Jennifer Gebelein, Dean Eppler

Jennifer Gebelein

The International Space Station (ISS) will provide an Earth‐and space‐observing platform that will support sensors built by 16 different countries and deliver data and images for local, regional and global research. When complete, it will be an exceptional platform for conducting remote sensing of the Earth, astrophysics, and space physics research programmes. Additionally, the ISS will operate as a testbed for engineering studies and complex technological developments that will benefit future Earth‐observing capabilities. ...


The Earth, Energy, And Agriculture, Tad W. Patzek Jun 2006

The Earth, Energy, And Agriculture, Tad W. Patzek

Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)

Presenter: Tad W. Patzek, Professor of Petroleum Engineering, University of California at Berkeley, Berkeley, CA.

13 pages (includes some color illustrations).

Contains references.


Slides: Climate Change & The Ecological Resources Of The West, Chris Field Jun 2006

Slides: Climate Change & The Ecological Resources Of The West, Chris Field

Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)

Presenter: Chris Field, Director, Department of Global Ecology, Carnegie Institution of Washington, DC.

39 slides.

Contains references.


Agenda: Climate Change And The Future Of The American West: Exploring The Legal And Policy Dimensions, University Of Colorado Boulder. Natural Resources Law Center Jun 2006

Agenda: Climate Change And The Future Of The American West: Exploring The Legal And Policy Dimensions, University Of Colorado Boulder. Natural Resources Law Center

Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)

Sponsors: The William and Flora Hewlett Foundation; BP America; Holland & Hart; Patrick, Miller & Krope, P.C.; The Rocky Mountain Mineral Law Foundation, Rocky Mountain Natural Resource Center of the National Wildlife Federation, Western Water Assessment.

Exploring the legal and political dimensions that climate change will bring to the American West will be the focus of the CU-Boulder Natural Resources Law Center's 27th Annual Summer Conference.

Titled "Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions," the conference will be held June 7-9 at the Fleming Law Building on the University of Colorado at Boulder campus.

Participants will ...


Off-Stream Water, Shade And Nutritional Supplementation To Modify Animal Behavior, James R. Russell, Matthew M. Haan, Daryl R. Strohbehn Jun 2006

Off-Stream Water, Shade And Nutritional Supplementation To Modify Animal Behavior, James R. Russell, Matthew M. Haan, Daryl R. Strohbehn

Agriculture and Environment Extension Publications

Another way to manage pasture water for positive water quality is to modify animal behavior. Find out about providing off-stream water, shade, and nutritional supplementation.


The Contribution Of Environmental Variables On Small Mammal Species Richness And Relative Abundance In Eastern Nevada, Stephanie Harris May 2006

The Contribution Of Environmental Variables On Small Mammal Species Richness And Relative Abundance In Eastern Nevada, Stephanie Harris

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to determine how four environmental variables: elevation, latitude, soil type, and vegetation impact the relative abundance of Peromyscus maniculatus and the species richness of small mammal populations in Eastern Nevada. In order to complete this study, a survey of small mammals was completed in the following 8 Eastern Nevada valleys: Delamar, Dry Lake, Dry Lake- Muleshoe,Cave, Lake, Snake, Spring, White River. In each valley, transects of Sherman live traps will be set up for 3 consecutive nights (O'Farrell et al 1977). Data on elevation, latitude, soil type, and vegetation were taken at ...


Anaerobic Digester Use In Dairy Farms In The United States, Shaun Elsasser May 2006

Anaerobic Digester Use In Dairy Farms In The United States, Shaun Elsasser

UNLV Theses, Dissertations, Professional Papers, and Capstones

Anaerobic digestion is a highly efficient process, trapping the methane gas from cow manure and processing it into energy. The steep initial capital costs make anaerobic digesters short-term liabilities, but the long-term benefits far outweigh the long-term costs. An anaerobic digester unit will begin to show a profit after approximately five years of operation. During the lifetime of the unit, estimated at 15 years, the digester will have produced about $ 1,000,000 in profits for the dairy farm, while also providing invaluable benefits to society as a whole.


The Fate And Transport Of Nitrogen (N) And The Effect Of Emergent Plants On Natural Treatment Of N-Species At Las Vegas Wash, Nevada, Tanju Kiriscioglu May 2006

The Fate And Transport Of Nitrogen (N) And The Effect Of Emergent Plants On Natural Treatment Of N-Species At Las Vegas Wash, Nevada, Tanju Kiriscioglu

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to analyze the effect of emergent plant communities at Las Vegas Wash (the System) using a system dynamics modeling approach. Understanding the dynamics of nitrogen (N —major polluting nutrient in the Wash) that enters the System is important because it occasionally causes algal blooms, choking Lake Mead through excessive eutrophication. Emergent plant communities are an integral part of wetland ecosystems and they play a crucial role in natural treatment of nutrients. This study is intended to test this hypothesis.

The study makes use of Wash data from reliable sources (Las Vegas Valley Water District ...


Sea Urchin Predation In Misali Island Marine Park, Nicole Esclamado Apr 2006

Sea Urchin Predation In Misali Island Marine Park, Nicole Esclamado

Independent Study Project (ISP) Collection

The populations of sea urchins and their main predators, triggerfish (Balistidae), wrasses (Labridae) and emperors (Lethrinidae), were studied in the extractive and non-extractive zones of the Misali Island Marine Conservation Area in order to (1) evaluate the applicability of a sea urchin-sea urchin predator model developed in Kenya’s fringing reefs, (2) gain baseline data on Misali’s coral reef, and (3) evaluate the recovery status of the protected zone. This study revealed the predictive power of the sea urchin-sea urchin predator model for the reef ecosystem of Misali Island. As expected, a decline in sea urchin predators as a ...


An Internet Based Portal For Fire Science And Management In The Southern Region Jan 2006

An Internet Based Portal For Fire Science And Management In The Southern Region

JFSP Research Project Reports

Task 1 – Organize a technical advisory team and host an initial workshop to explore methods for integrating FRAMES, TTRS, and ESFS websites.

Task 2 – Identify and acquire data, tools, and publications from funded JFSP and NFP projects working with the JFSP and NFP project databases and principal investigators. Also, when possible identify and acquire data and tools used and created by others in the wildland fire community including state agencies, educational institutions, and non-governmental organizations.

Task 3 – Develop and post online FGDC metadata records for all datasets from funded JFSP and NFP projects as well as key state information

Task ...


A Comparison Of Presettlement Vegetation And Fire Regimes With Current Patterns In Oak Woodlands And Shrublands Of Sw Oregon, Patricia S. Muir Dr., Paul Hosten Dr. Jan 2006

A Comparison Of Presettlement Vegetation And Fire Regimes With Current Patterns In Oak Woodlands And Shrublands Of Sw Oregon, Patricia S. Muir Dr., Paul Hosten Dr.

JFSP Research Project Reports

Fuel reduction efforts on BLM lands in southwestern Oregon are motivated by the need to reduce fire hazard and restore and rehabilitate ecosystems. Successful ecosystem restoration depends, in part, on understanding the target: what ecosystem model is considered natural and healthy for a given area? Oak (Quercus garryana) woodlands and shrublands are two of the most characteristic ecosystems in interior valleys of southwest Oregon, and extensive acreages within these systems are treated annually for fuel reduction. However, these are also two of the least understood ecosystems in the region. We know little about their presettlement attributes, responses to disturbance, or ...


Prevalence And Serovars Of Salmonella In The Feces Of Free-Ranging White-Tailed Deer (Odocoileus Virginianus) In Nebraska, David G. Renter, David P. Gnad, Jan M. Sargeant, Scott E. Hygnstrom Jan 2006

Prevalence And Serovars Of Salmonella In The Feces Of Free-Ranging White-Tailed Deer (Odocoileus Virginianus) In Nebraska, David G. Renter, David P. Gnad, Jan M. Sargeant, Scott E. Hygnstrom

Papers in Natural Resources

To determine the prevalence and serovars of Salmonella in free-ranging deer, we cultured feces from white-tailed deer (Odocoileus virginianus) harvested by hunters during a regular firearm season in southeastern Nebraska (USA). We recovered Salmonella from 5 (1%; 95% confidence interval: 0.37– 2.20%) of 500 samples and identified four different Salmonella enterica serovars [Litchfield (1), Dessau (1), Infantis (2), and Enteritidis (1)]. Although the prevalence of Salmonella in free-ranging deer appears to be low, the serovars recovered are known to be pathogenic to humans and animals.


Impacts Of Managed Grazing On Stream Ecology And Water Quality, James R. Russell Jan 2006

Impacts Of Managed Grazing On Stream Ecology And Water Quality, James R. Russell

Leopold Center Completed Grant Reports

The project measures and analyzes the varying effects different grazing systems have on the nutrients that appear in surface runoff.


Terpenes And Carbohydrate Source Influence Rumen Fermentation, Digestibility, Intake, And Preference In Sheep, J. J. Villalba, F. D. Provenza, K. C. Olson Jan 2006

Terpenes And Carbohydrate Source Influence Rumen Fermentation, Digestibility, Intake, And Preference In Sheep, J. J. Villalba, F. D. Provenza, K. C. Olson

Green Canyon Environmental Research Area, Logan Utah

We hypothesized that toxins and nutrients in foods interact to influence foraging behavior by herbivores. Based on this hypothesis we predicted that 1) terpenes in big sagebrush (Artemisia tridentata) influence intake and preference in sheep for diets varying in sources of nonstructural (barley grain) and structural (sugar beet pulp) carbohydrates, and 2) these effects are due to the differential effects of terpenes on fermentation products and apparent digestibility of each class of carbohydrates. Lambs were fed 2 isoenergetic and isonitrogenous diets with varying proportions of the same ingredients (beet pulp- and barley grain-based diet) or offered a choice between the ...


The Role Of Herbaceous Woodland Perennial Diversity For Improving Nutrient Uptake Capacity Of Riparian Areas, Cathy Mabry Mcmullen, Janette Thompson Jan 2006

The Role Of Herbaceous Woodland Perennial Diversity For Improving Nutrient Uptake Capacity Of Riparian Areas, Cathy Mabry Mcmullen, Janette Thompson

Leopold Center Completed Grant Reports

This project investigated the roles of forest understory perennial plant communities in storing nutrients and preventing pollution of surface waters.


The Influence Of Predation On The Nesting Ecology Of Diamondback Terrapins (Malaclemys Terrapin) In The Lower Chesapeake Bay, Victoria Ann Ruzicka Jan 2006

The Influence Of Predation On The Nesting Ecology Of Diamondback Terrapins (Malaclemys Terrapin) In The Lower Chesapeake Bay, Victoria Ann Ruzicka

Dissertations, Theses, and Masters Projects

No abstract provided.


The Freshwater Gastropods Of Iowa (1821-1998): Species Composition, Geographic Distributions, And Conservation Concerns, Timothy W. Stewart Jan 2006

The Freshwater Gastropods Of Iowa (1821-1998): Species Composition, Geographic Distributions, And Conservation Concerns, Timothy W. Stewart

Natural Resource Ecology and Management Publications

Although gastropods are important members of freshwater communities, the geographic range, ecological requirement, and conservation status of most species are poorly known. To advance this understanding, I used survey data from museums and peer-reviewed literature to summarize knowledge of the taxonomic composition and geographic distributions of freshwater gastropods in Iowa, U.S.A. Excluding records likely based on erroneous reports, 49 freshwater gastropod taxa (47 species and 2 genera with unknown numbers of species) inhabited Iowa during all or part of the period when records were collected (1821-1998). The Mississippi River and nearby tributaries of eastern Iowa and the prairie ...


Habitat, Land Use, And Fish Assemblage Relationships In Iowa Streams: Preliminary Assessment In An Agricultural Landscape, Jeremiah D. Heitke, Clay L. Pierce, Gregory T. Gelwicks, Gregory A. Simmons, Gary L. Siegwarth Jan 2006

Habitat, Land Use, And Fish Assemblage Relationships In Iowa Streams: Preliminary Assessment In An Agricultural Landscape, Jeremiah D. Heitke, Clay L. Pierce, Gregory T. Gelwicks, Gregory A. Simmons, Gary L. Siegwarth

Natural Resource Ecology and Management Publications

Iowa leads the nation in percentage of land area converted to cropland, with a resulting negative impact on streams. We examined physical habitat, land use, and fish assemblage data from 37 second- to sixth-order stream sites, representing 7 of the 10 ecoregions within Iowa. Physical habitat conditions varied widely among sites, with sand dominating substrate composition. A nonmetric multidimensional scaling ordination of physical habitat variables suggested a pattern of among-site similarities defined by a stream size axis, an axis contrasting sites dominated by either woody or rocky fish cover, and an axis characterizing degree of riparian canopy coverage. Bluntnose minnow ...


Relation Of Riparian Buffer Strips To In-Stream Habitat, Macroinvertebrates And Fish In A Small Iowa Stream, Jeremy P. Duehr, Michael J. Siepker, Clay L. Pierce, Thomas M. Isenhart Jan 2006

Relation Of Riparian Buffer Strips To In-Stream Habitat, Macroinvertebrates And Fish In A Small Iowa Stream, Jeremy P. Duehr, Michael J. Siepker, Clay L. Pierce, Thomas M. Isenhart

Natural Resource Ecology and Management Publications

Macroinvertebrate and fish habitat is often degraded as a result of agriculture. Riparian buffer strips are commonly used to counteract the negative effects of agriculture in headwater streams. We assessed the relation of multi-aged riparian buffer strips to in-stream habitat, macroinvertebrate and fish assemblages in an Iowa stream. In-stream habitat, macroinvertebrates, and fish were sampled from two buffered sites and two unbuffered sites, with the greatest substrate, water depth, and velocity heterogeneity occurring in buffered sites. The highest macroinvertebrate richness (11) as well as fish species richness (14), diversity (1.99) and IBI score (37) were found in the site ...


Fire Does Not Alter Vegetation In Infertile Prairie, Johannes M.H. Knops Jan 2006

Fire Does Not Alter Vegetation In Infertile Prairie, Johannes M.H. Knops

Faculty Publications in the Biological Sciences

The paradigm in prairie ecology is that fire is one of the key factors deter-mining vegetation composition. fire can impact grassland ecosystems in various ways, including changing plant species composition and inducing nitro-gen loss. I found that 17 years of different burning frequencies in infertile grassland had only a minor impact on the vegetation composition and diversity. The only major impact from increasing the frequency of fires was a decrease of Poa pratensis abundance. However, other plant species did not r-spond to the change in Poa abundance. This result contrasts with previous studies in savannas and more productive grasslands, where ...


Virginia Game Fish Tagging Program Annual Report 2005, John A. Lucy, C.M. Bain Iii Jan 2006

Virginia Game Fish Tagging Program Annual Report 2005, John A. Lucy, C.M. Bain Iii

Reports

The Virginia Game Fish Tagging Program (VGFTP), initiated in 1995, coordinates tagging and a tag-recapture fish database generated through contributed efforts of a dedicated corps of trained marine anglers. Through 2005, the program’s database includes nearly 88,000 records of tag-released fish and approximately 8,300 recaptures.