Physical Sciences and Mathematics Commons^™

Prairie Dog Population Growth: Relationships To Population Density, Habitat, And Livestock Grazing Management, Kelly A. Cable

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Effects Of Sediment Addition On The Drift Of Aquatic Macroinvertebrates In Nine Mile Creek, Nebraska, Laurence Angle

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Las Vegas Wash And Lake Mead Proposed Water Quality Standards: Revisions And Rationale, State Of Nevada: Division Of Environmental Protection

Publications (WR)

Rationale of review and for proposed changes to the Nevada Pollution Control Regulations (NAC 445.1354, 445.1355, 445.1356, 455.1367, 445.1352, 445.1353, 445.1350, 445.1351) before the State Environmental Commission on June 23 and 24, 1987.

Comparison Of Littoral And Limnetic Zooplankton Communities Of Lake Mead, Patrick Joseph Sollberger

Publications (WR)

Microfaunal communities were studied in littoral (inshore) and limnetic (offshore) areas of the lower basin in Lake Mead to compare species composition and abundance between the two zones. Planktonic forms (zooplankton) dominated inshore and offshore habitats and the occurrence of littoral species was low. Therefore, high similarity in zooplankton species composition was found among all sampling stations. This was perhaps due to two main factors: (i) the physical and chemical environment among the stations were very similar and (ii) the lack of aquatic vegetation in the littoral zone reduced the occurrence of littoral species.

Although species composition did not vary …

Resource Law Notes Newsletter, No. 11, Apr. 1987, University Of Colorado Boulder. Natural Resources Law Center

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

No abstract provided.

A Test Of Habitat Evaluation Models Using Avian Densities, Jeremy B. Cable

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

The Prairie Naturalist Volume 19, No. 1 March 1987

The Prairie Naturalist

Paul B. Kannowski, Editor

Nikki R. Seabloom, Assistant Editor

Douglas H. Johnson, Book Review Editor

TABLE OF CONTENTS

ECOLOGY OF WHITE-TAILED DEER IN UPLAND PONDEROSA PINE HABITAT IN SOUTHEASTERN MONTANA ▪ G. L. Dusek

PRECISION AND BIAS OF A SUMMER AERIAL TRANSECT CENSUS OF PRONGHORN ANTELOPE ▪ S. H. Allen and J. M. Samuelson

ACTIVITY PATTERNS, MOVEMENTS, AND HOME RANGES OF PRAIRIE MINK ▪ T. W. Arnold and E. K. Fritzell

BRYOPHYTES OF THE SOUTH UNIT OF THEODORE ROOSEVELT NATIONAL PARK, NORTH DAKOTA ▪ C. L. Blaney and D. H. Norris

FALL FOOD HABITS OF WILD TURKEYS IN SOUTH CENTRAL …

Use Of Climatic Data To Identify Potential Sites In The United States For Growing Papaver Bracteatum As A Pharmaceutical Crop, R.E. Neild

School of Natural Resources: Faculty Publications

A procedure utilizing maps in the National Climatic Atlas was used to survey the United States to find areas for domesticating Papaver bracteatum, a wild poppy from the Trans-Causasus. This poppy had unique properties which make it a possible heroinless source of codeine. Climatic conditions similar to the native habitat and requirements of Papaver bracteatum can be found in areas of western Utah, northern Nevada, southern Idaho, eastern Washington and Oregon, northeastern California and southwestern Wyoming. A detailed climatic analysis was made to evaluate more specific locations within this large area. A site near Medford, Oregon was selected as best …

Competition For Food And Space In A Heteromyid Community In The Great Basin Desert, Cliff A. Lemen, Patricia W. Freeman

School of Natural Resources: Faculty Publications

ABSTRACT.—A series of removal experiments were performed on Dipodomys merriami, D. microps, and Perognathus longimembris to test for the importance of competition for food and microhabitats in a heteromyid community in the Great Basin Desert. Each of these species was removed singly to determine the short-term effects on the microhabitat preferences of the remaining species. We correctly predicted, based on differences in diet, that the removal of D. microps (a foliovore) would have no effect on D. merriami or P. longimembris (granivores). Using the dominance hierarchy theory, we correctly predicted that removal of a larger heteromyid, D. merriami …

Chesapeake Bay Fisheries: An Overview, Herbert M. Austin

VIMS Books and Book Chapters

The value of the marine resources of the Chesapeake Bay is second only to its value as a transportation corridor. The oyster, blue crab and striped bass or rock fish, along with the sailboat, epitomize our vision of the Bay. Nowhere else do such important renewable natural resources co-exist so closely to man's residential and industrial activities.

Over time, all natural resource distribution and abundance fluctuates in response to a normally fluctuating environment. Man's harvest adds an additional pressure, and in some cases recruitment levels cannot keep pace with consumer demand. In the Bay, pollutants, both intentional point source discharge, …

Submerged And Emergent Aquatic Vegetation Of The Chesapeake Bay, Carl Hershner, Richard L. Wetzel

VIMS Books and Book Chapters

Chesapeake Bay supports a diverse assemblage of submerged and emergent aquatic vegetation. The distribution of species of each kind of vegetation is governed largely by salinity. The functions of both submerged and emergent vegetation in the Bay ecosystem includes contributing to total net primary production, service a habitat and performance in both water quality and sedimentation processes. Research on submerged aquatic vegetation is focused on its role in the estuarine system and determinants of its distribution and abundance. Research on emergent vegetation still concerns basic questions of structure and function, but has also branched into methodologies for utilization by man …

A Climatology Of Mean Monthly Snowfall For The Conterminous United States: Temporal And Spatial Patterns, John A. Harrington Jr., Randall S. Cerveny, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

Mean monthly snowfall data for 216 stations across the conterminous United States were analyzed to produce a climatology that identifies statistical, spatial and intraseasonal aspects. Geographic variations in the length of the snowfall season are characterized using two statistics: the number of months of snow and the Snow Concentration Index (SCI).

The Annual distribution of mean monthly snowfall is also examined using harmonic analysis. Snowfall across the conterminous United States generally peaks in February; earlier snowfall maxima are found in the Great Lakes area and in the Pacific Northwest, whereas late February or March maxima occur in the western High …

Satellite-Derived Maps Of Snow Cover Frequency For The Northern Hemisphere, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

A satellite imagery-based Northern Hemisphere snow cover data archive was mapped for the period 1966-84: The maps were digitized in order to create the first hemispheric, spatially data-continuous climatologies of snow cover. Annual and monthly climatologies were created and compared to several standard or frequently referenced climatologies. Results of this analysis indicate that the satellite-based climatology provides a much more detailed climatology for the higher latitude and highland regions of the Northern Hemisphere. The satellite imagery-based maps, when compared to the historical snow cover climatologies, indicated more extensive high-latitude snow cover concurrent with a northward shift in the southern extent …

A Preliminary Investigation Of A Relationship Between South American Snow Cover And The Southern Oscillation, Randall S. Cerveny, Brent R. Skeeter, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

A ten-year (1974-83) satellite record of snow cover is compared to a standard index of the Southern Oscillation. South American snow cover area during the May-October snow season is found to be correlated significantly with the winter SOI values of the same year. The relationship is inverse; periods of low SOI values are associated with extensive South American snow cover while periods of high SOI values occur during years of diminished snow cover. The movements of the Pacific anticyclone and the midlatitude westerlies and subsequent changes in precipitation and temperature patterns are discussed in an analysis of this relationship.

Windbreaks And Crop Production, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Paleogeomorphic Significance Of Two Paleosols In The Dakota Formation (Cretaceous), Southeastern Nebraska, R. M. Joeckel

School of Natural Resources: Faculty Publications

No abstract provided.

Effects Of Fire In The Northern Great Plains, Kenneth F. Higgins, Arnold D. Kruse, James L. Piehl

SDSU Extension Circulars

Fire has been used inconsistently to manage native and tame grasslands in the Northern Great Plains (NGP) of the north-central U.S. and south-central Canada, particularly the grasslands found in prairies, plains, agricultural land retirement programs, and moist soil sites. This has happened for three primary reasons: (1) the reduction of American Indian use of fire after 1875, (2) fire suppression and land use changes that put increasingly more acres under annual tillage since about the same time, and (3) a growing resistance to the use of fire since about 1940, largely due to media overemphasis of its harmful effects (e.g., …

Resource Law Notes Newsletter, No. 10, Jan. 1987, University Of Colorado Boulder. Natural Resources Law Center

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

No abstract provided.

Colorado River Salinity Control Program Final Environmental Impact Statement For Big Sandy River Unit, Sublette And Sweetwater Counties, Wyoming, United States Department Of Agriculture, Soil Conservation Service

Environmental Assessments (NV)

No abstract provided.

Contaminant Effects On Chesapeake Bay Finfishes, Ronald J. Klauda, Michael E. Bender

VIMS Books and Book Chapters

Habitat deterioration is consistent with perceived population declines for several resident and anadromous finfish species in Chesapeake Bay that are subjected to different levels of fishing pressure (e.g., striped bass versus blueback herring). Diminution of habitat quality has natural and anthropogenic roots that are difficult to separate. Recent contaminant effects studies focused on Chesapeake Bay fishes can be grouped as follows: (a) mathematical and statistical modeling studies aimed at elucidating contaminant and stock trend relationships using extant data and theoretical insights, (b) biological and chemical field surveys in selected areas to demonstrate spatio-temporal associations between levels of toxic organic and …

Contaminants In Chesapeake Bay: The Regional Perspective, George R. Helz, Robert J. Huggett

VIMS Books and Book Chapters

Industrial and municipal point sources of contaminants are scattered along the shores of Chesapeake Bay and its tributaries, but reach especially high density at Norfolk, Va., and Baltimore, Md. Sedimentation and various chemical processes in many cases conspire to restrict the water-borne transport of contaminant away from point source . Kepone, residual chlorine, volatile halogenated hydrocarbons, and anthropogenic trace metals are well-studied example of point-source contaminants. For the most part, their concentration in water and sediment drop to nearly immeasurable values within a distance of a few kilometers, or sometimes a few tens of kilometers, from their source .

On …

A Mark-Recapture Study Of Striped Bass In The James River, Virginia : Annual Report 1987, Joseph G. Loesch, William H. Kriete Jr., Bruce W. Hill

Reports

Internal anchor tags with external tubes were used to tag 1,986 striped bass in the James River in the Spring of 1987. The total number tagged was adjusted (at this time) to 823 because of observed and suspected tagging mortality. The available stock of striped bass in the Spring contained both young resident fish and mature nonresident fish which left the area of capture after spawning, presumably to migrate north in coastal waters. The exodus of the mature fish after spawning and the absence of a commercial fishery resulted in only 42 tag returns as of Spring 1988. This proportion …

Biotic Responses On Typha-Monodominant Semipermanent Wetlands To Cattle Grazing, Bryan David Schultz

Electronic Theses and Dissertations

Changes in the vegetative composition of most palustrine emergent semi-permanent wetlands is primarily a function of water level fluctuation. However, some wetlands do not exhibit vegetational shifts since emergent species such as Typha persist under flooded as well as drought conditions. Numerous techniques to control cattails such as burning and herbicide application have been suggested. The objective of this study was to test the use of cattle grazing as a method of controlling dense cattail stands in semi-permanent wetlands to improve breeding duck habitat. Plots (.81 ha) were established in the emergent zone in each of two wetlands (≤ 4 …

Evaluation Of Largemouth Bass And Bluegill Stocking Strategies In South Dakota Ponds, David M. Gilbraith

Electronic Theses and Dissertations

Three fish-stocking methods were evaluated to determine the effects of stocking density and chronology on largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus) survival, growth, and reproductive success during 1983-1985. Two densities of split-stocking largemouth bass with bluegills were compared to the simultaneous introduction of both species. First-year largemouth bass survival was low and variable among treatments. Survival of largemouth bass ranged from 0-85% and averaged 25% among treatments. Bluegill survival, for the first and second years combined, ranged from 0-60% and averaged 22% among two split-stocking treatments. Thirty-six percent of study ponds experienced at least partial winterkill during the …

Effects Of Contaminants On Estuarine Zooplankton, Brian P. Bradley, Morrris H. Roberts Jr.

VIMS Books and Book Chapters

The objectives of the chapter are (1) to evaluate laboratory studies concerning effects of heavy metals, pesticides and oxidants on copepods, mysids, bivalve and decapod larvae (2) access field studies (mainly with copepods) on these and other contaminants which when coupled with laboratory data provide information on known and potential hazards of contaminants to zooplankton and (3) briefly review some bioassay methods used in these studies.

Mercury is the most toxic heavy metal by weight, followed by copper, silver and cadmium. Pesticides have been tested much less extensively than heavy metals. In general, bivalve larvae seem less sensitive than the …

Mollusk Culture For The Chesapeake Bay, Michael Castagna

VIMS Books and Book Chapters

The water quality of the Chesapeake Bay has suffered a decline over the last 5 decades due to anthropomorphic activities. Insidious additions of industrial and farm pollutant to the Bay have created a situation where in many areas there are periodic sub lethal levels of chemicals. Although the juveniles and adults seem to survive these levels, they are obviously interfering with some early life stage of the living organisms that make up the bay fauna. Species whose early life history takes place out of the Bay (i.e. Cal!inectes sapidus) are less affected by this problem than those species whose eggs, …

Contaminant Effects On Chesapeake Bay Shellfish, Michael E. Bender, Robert J. Huggett

VIMS Books and Book Chapters

The paper reviews contaminant effects on Chesapeake Bay shellfish from two avenues (1) adverse biological effects on the organisms and (2) fisheries closures due to bacterial and chemical contamination. The use of shellfish to monitor anthropogenic inputs of chemical contaminants is also discussed. Fisheries closures due to bacterial contamination account for the greatest economic loss due to man's activities. Kepone contamination in the James River, Virginia caused fisheries closures but has not appeared to cause biological damage to the resources. Organotin compounds from antifouling paints appear to pose a threat to Chesapeake Bay shellfish.

Factors Affecting The Distribution And Abundance Of The Blue Crab In Chesapeake Bay, W. A. Van Engel

VIMS Books and Book Chapters

That environmental conditions in the Chesapeake Bay are optimal for the blue crab population is suggested by the fact that hard crab landings by Virginia and Maryland watermen accounted for almost 48% of the total of East and Gulf coast landings in 1985. Estimates of total mortality from the egg to the adult stage range from 0.999973 to 0.999996. Commercial fishing removes an additional 0.0000031 to 0.0000251, leaving 0.0000024 to 0.000001 as the rates of removal by other sources. Physical and chemical pollutants, predators, and plants and animals symbiotic with the blue crab are part of the environment that must …

Forested Buffer Zones : Pilot Studies On Efficiency In Reducing Surface And Shallow Groundwater Nutrient Inputs To Estuarine Waters, Carl Hershner

Reports

This study was designed as a pilot study with the intent of identifying important considerations for the design and conduct of an investigation of forested buffer strip performance in Virginia's coastal plain. The approach 3 4' I was to conduct a small preliminary study on a single site using the opportunity to investigate a number of potential sampling methods.

An Inventory And Condition Survey Of Rangelands In The Carnarvon Basin, Western Australia, A L. Payne, G F. Spencer, P J. Curry

Technical Bulletins

The inventory and condition survey of rangelands in the Carnarvon Basin, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1980 and 1982, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed covers …