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Roost Sites Used By Sandhill Crane Staging Along The Platte River, Nebraska, Bradley S. Norling, Stanley H. Anderson, Wayne A. Hubert

Great Basin Naturalist

We assessed the influence of water depth, extent of unobstructed view, and human disturbance features on use of roost sites by Sandhill Cranes along the Platte River, Nebraska, during spring migratory stopover. Aerial photos taken near dawn were used to determine areas of flock use and habitat availability in four sample reaches, and measurements were made on the ground at flock roost areas. In general, depths of 1–13 cm were used by sandhill cranes in greater proportion than those available. Exposed sandbars and depths >20 cm were avoided, while depths of 14–19 cm were used in proportion to their availability. …

Vista: November 12, 1992, University Of San Diego

USD Vista

No abstract provided.

The Spatial Variation Of Asian Dust And Marine Aerosol Contributions To Glaciochemical Signals In Central Asia, Cameron P. Wake, Paul A. Mayewski

Earth Sciences

Short-term (6 months to 17 years) glaciochemical records have been collected from several glacier basins in the mountains of central Asia. The spatial distribution of snow chemistry in central Asia is controlled by the influx of dust from the large expanse of arid and semiarid regions in central Asia. Glaciers in the Northern and Western Tibetan Plateau show elevated concentrations and elevated annual fluxes of calcium, sodium, chloride, sulphate and nitrate due to the influx of desert dust from nearby arid and semi-arid regions. Glaciers in the Southeastern Tibetan Plateau show lower concentrations and lower annual fluxes of major ions …

Western Wildlands, Volume 18, Number 3, 1992, University Of Montana (Missoula, Mont. : 1965-1994). Montana Forest And Conservation Experiment Station

Western Wildlands, 1974-1992

The Western Wildlands journal issue for Fall 1992.

Red Butte Canyon Research Natural Area: History, Flora, Geology, Climate, And Ecology, James R. Ehleringer, Lois A. Arnow, Ted Arnow, Irving B. Mcnulty, Norman C. Negus

Great Basin Naturalist

Red Butte Canyon is a protected, near pristine canyon entering Salt Lake Valley, Utah. It contains a well-developed riparian zone and a perennial stream; hillside vegetation ranges from grasslands on the lower limits to Douglas-fir and aspen stands at the upper elevations. In this paper we describe the history of human impact, natural history aspects of climate, geology, and ecology, and faunal and floral information for key species in the canyon. The role and importance of Research Natural Areas is discussed, particularly with respect to the need to protect Red Butte Canyon—one of the few remaining undisturbed riparian ecosystems in …

Vegetation Associated With Two Alien Plant Species In A Fescue Grassland In Glacier National Park, Montana, Robin W. Tyser

Great Basin Naturalist

No abstract provided.

School Of Marine Science Graduate Catalog 1992-93, College Of William And Mary, School Of Marine Science

Miscellaneous

Catalog for the Graduate program of the School of Marine Science at the College of William & Mary for the listed academic year.

The Probe, Issue 124 - August 1992

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE
National Animal Damage Control Association
AUGUST 1992
The Public, Coyotes, and Wildlife Damage Management
Calendar of Upcoming Events
Tenth Great Plains Wildlife Damage Control Workshop Proceedings.
Animal Damage Control in the News:
Pickups Seized in Federal Raid
Colorado Phases Out Spring Bear Hunt
WLFA Works to Defeat Proposed Arizona Hunting/Trapping Ban
DWRC Attempting to Develop Deer Baits
Canadian Trappers' Delegation Attends ISO Meeting
Professional trappers College
Public, Coyotes, & Wildlife Damage Management
News from the Northeast
The Coyote by Baxter Black

A Chromosome Study Of Blue Grama (Bouteloua Gracilis) In Northern Colorado, T. Tsuchiya, W. Mcginnies, A. Shahla

Great Plains Research: A Journal of Natural and Social Sciences

Chromosomes were studied in somatic cells of 60 plants of blue grama, Bouteloua gracilis (Willd. ex Kunth) Lag ex Griffiths, collected from a 7-hectare field of native range at the Central Plains Experiment Range (CPER), Nunn, Colorado, to determine chromosome constitution in relation to the plant characteristics. Somatic chromosomes were studied in root tips collected from vigorously growing plants in the greenhouse. Acetocarmine squash method was used to make slide preparation. The majority of the plants were 2n =40. However, three plants were 2n=50 and two were 2n=60. The pentaploid plants (2n =50) were recorded for the first time in …

Review Of Cheyenne Bottoms: Wetland In Jeopardy By John L. Zimmerman, John Janovy

Great Plains Research: A Journal of Natural and Social Sciences

The Cheyenne Bottoms, Barton County, Kansas, has long been hallowed ground for birders and scientists as well as hunters. The dikes let one drive slowly through the marshes, scanning the flats for favorite sandpiper species and experiencing first hand the isolation of the central Kansas prairies. John Zimmerman, professor of biology at Kansas State University, had captured the Cheyenne Bottoms aura in eloquent prose, giving us a taste of wetlands natural history, while bringing to life the political and economic conflicts surrounding Arkansas River, and Walnut Creek, water. In many ways, the Cheyenne Bottoms case is a modern archetypical prairie …

Metropolitan Greenspaces: Master Plan, Metro (Or.)

Metro Collection

No abstract provided.

The Probe, Issue 123 - July 1992

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE
National Animal Damage Control Association
JULY 1992
Wildlife Damage and Animal Welfare: An Australian Approach
Calendar of Upcoming Events
Tenth Great Plains Wildlife Damage Control Workshop Proceedings.
Animal Damage Control in the News:
Prairie Dog Vacuum Less Than Successful
New Livestock Protection Collar Improves Protection Results
Solano Beach Pet Owners Object to Coyote Trapping
DWRC Assists Developing Countries to Increase Food Availability
Nebraska Sheep Producers Reveal Attitudes Toward Predators
USDA Livestock Depredation Survey
Vermont Citizens Find APHIS/ADC Rabies Hotline Contagious
Utah Man Wants Compensation For Coyote Attack

The Public Trust Doctrine And Community Values In Water, Helen Ingram, Cy R. Oggins

Natural Resources Journal

No abstract provided.

Western Wildlands, Volume 18, Number 2, 1992, University Of Montana (Missoula, Mont. : 1965-1994). Montana Forest And Conservation Experiment Station

Western Wildlands, 1974-1992

The Western Wildlands journal issue for Summer 1992.

History And Status Of The Vims Fish Collection (1951-1992), J. A. Musick, J. E. Olney, C. C. Baldwin

Reports

The fish collection housed at the Virginia Institute of Marine Science of the College of William and Mary provides an important resource for taxonomic, systematic and ecological investigations of freshwater, estuarine and marine fishes. The uniqueness of the collection is in part due to its historical significance as well as a close coupling with a strong graduate program in ichthyology. The collection has internationally recognized holdings of Chesapeake Bay, middle Atlantic Bight and deep-water marine fishes, as well as freshwater fishes of the southern Appalachians. These collections have provided the basis for numerous graduate research projects and investigations by systematists …

The Study Of Activated Sludge Settleability Using The Solids-Flux Analysis, Churng-Cherng Lin

Theses

The activated sludge was cultivated in two pilot-scale activated sludge systems under three ratios of BOD to N, equal to 20:1, 70:1 and 300:1 in the influent wastewater. The aeration tank of the activated sludge system was constructed in two different configurations: one without compartments in the tank, the other consisting of six compartments. The activated sludge withdrawn from the last compartment of each system was tested in a one-liter graduate cylinder to measure its zone settling velocity. The solids-flux method was employed to analyze the sludge settling characteristic as a function of solids concentration. The results show that the …

Relating Soil Chemistry And Plant Relationship In Wooded Draws Of The Northern Great Plains, Marguerite E. Voorhees, Daniel W. Uresk

Great Basin Naturalist

Soils of the green ash/chokecherry habitat type in northwestern South Dakota were evaluated for 22 properties to determine whether any could be correlated with density of chokecherry (Prunus virginiana) and snowberry (Symphoricarpos occidentalis). Surface soils were moderately fertile, with high levels of all elements except phosphorus and nitrogen. Soils were fine textured with moderately high cation exchange capacity and saturation percentages. However, soils were nonsaline-nonalkaline with low amounts of exchangeable sodium. None of the soil properties showed good correlation with chokecherry and snowberry densities. Greatest correlations were found between each of the shrub species and grass.

General Catalog: Undergraduate Catalog, 1992-1994, Eastern Washington University

Course Catalogs

Eastern Washington University's course catalog for the 1992-1993 and 1993-1994 academic years.

The National Wildlife Refuge System: Incompatible Recreational And Economic Uses Of Refuge Lands, Kimberley J. Priestley

Washington International Law Journal

This Comment addresses the problem of incompatible uses on refuge lands. Section I briefly summarizes the history and management of the NWRS and sets forth the basic tenets of the NWRS Administration Act's "compatibility" standard. Section II points out the problems of incompatible secondary uses on refuge lands. Section III examines the possible reasons behind the FWS's acquiescence to these incompatible recreational and economic uses and proposes solutions. Finally, this Comment concludes that an organic act, coupled with increased funding, would help the NWRS achieve its primary goal of providing protection for wildlife resources and their habitats.

Interactions Between Populations Of Intermediate Wheatgrass And Western Wheatgrass As Influenced By Short-Duration Grazing And Moisture Availability, Gerrit B. Bartels

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of grazing and moisture availability on the competitive interactions of intermediate wheatgrass (Thinopyrum intermedium (Host) Barkw. & D.R. Dewey) and western wheatgrass (Pascopyrum smithii (Rhydb.) A. Love) were examined under a short-duration grazing system in central Utah. The fate of tiller cohorts was observed at approximately monthly intervals at the interface between patches of these two rhizomatous grasses and in monospecific stands. The effects of short-duration grazing, clipping of western wheatgrass following grazing to achieve levels of utilization equivalent to that of intermediate wheatgrass, irrigation, and removal of the competitor were assessed in terms of the …

Ecological Implications Of Flavor Generalization By Sheep: Role Of Flavor Intensity And Variation In Toxin Dose, Karen L. Launchbaugh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Researchers studying diet selection of ungulate herbivores have generally considered plant palatability independent of animals' dietary history. However, more recent studies demonstrate that experiences within the life of an animal strongly influence plant selection. We are beginning to understand how food preferences and aversions are formed through gastro-intestinal feedback. My research specifically examines factors that influence the formation of conditioned flavor aversions in the generalist herbivore, sheep.

I first examined how variability of food toxicity affects the intake of those foods. I determined that sheep apparently have several mechanisms for regulating intake of toxic foods regardless of whether or not …

The Messenger -- April 21, 1992, Roger Williams University

The Messenger

No abstract provided.

Population Studies Of Migratory Birds In Virgin Islands National Park, Robert A. Askins, David N. Ewert

Biology Faculty Publications

The majority of the individual songbirds nesting in the deciduous forests of eastern North America migrate to the West Indies, Central America and South America during the winter. They typically spend more than six months in tropical winter habitats. Until recently relatively little was known about their habitat requirements during the winter, but increasing concern about declining pcpulations of many migratory songbirds combined with widespread alarm about the rapid destruction of tropical forests has led to a flurry of research on this subject (Terborgh, 1989; Askins et al. 1990). In 1987 we initiated a study of the ecology and behavior …

Environmental Factors Influencing Prehistoric Site Selection Along The Portage River, A Tributary Of The St. Joseph River, Southwest Michigan, Timothy D. Knapp

Masters Theses

This study examines the environmental factors influencing the location of prehistoric sites within the Portage River drainage. Over 100 sites recorded during four seasons of archaeological survey are examined applying the following environmental variables: type of glacial deposit, glacial landform, soil, distance to the nearest source of water, distance to the nearest ponded water, and vegetation zones occurring within 100, 500, and 1000 meters. Site locations are then statistically compared with the location of 100 randomly generated loci within the study area.

The findings of this research indicate that sites are non-randomly located with respect to certain environmental variables. Sites …

Ecological Studies Of Wolves On Isle Royale, 1991-1992, Rolf O. Peterson

Ecological Studies of Wolves on Isle Royale

Annual Report 1991-1992

The Prairie Naturalist Volume 24, No.1 March 1992

The Prairie Naturalist

HABITAT CONSERVATION FOR NESTING LEAST TERNS AND PIPING PLOVERS ON THE PLATTE RIVER, NEBRASKA ▪ J. W. Ziewitz, J. G. Sidle, and J. J. Dinan

DIURNAL FLIGHT TIME OF WINTERING CANADA GEESE: CONSIDERATION OF REFUGES AND FLIGHT ENERGETICS ▪ J. E. Austin and D. D. Humburg

MYCOTOXIN OCCURRENCE IN WASTE FIELD CORN AND INGESTA OF WILD GEESE IN THE NORTHERN GREAT PLAINS ▪ K. F. Higgins, R. M. Barta, R. G. Neiger, G. E. Rottinghaus, and R. I. Sterry

NOTES

Cost of Nest Reuse by Western Kingbirds ▪ T. M. Bergin

A New Record for Falcate Spurge in the Midwest …

Management Of Birds Associated With Buildings At The University Of California, Berkeley, Arthur J. Slater

Proceedings of the Fifteenth Vertebrate Pest Conference 1992

Information concerning fifteen species of birds associated with twenty-five buildings on the University of California at Berkeley has been collected for nineteen years. Fourteen species are included under three minor associations (temporary roosters, building invaders, and species that nest on, or in buildings in small numbers). Two species (cliff swallows, and feral pigeons) have caused major problems. Feral pigeons problems have been the most difficult and complex to resolve. Case histories are used to describe problems associated with these birds (ectoparasites, building defacement and messiness, slipping hazards and noise), and human contributions to the problems (feeding, trap vandalism, and legal …

Master Plan- Management Of Environmentally Sensitive Lands Within The Port Manatee Planning Area, Roy R. Lewis, Gene Bauer

Reports

In Apri11989, Tampa Electric Company established a Corporate Stewardship Program to review and make recommendations concerning environmentally sensitive lands owned by Tampa Electric Company lying outside of the then EPFG-designated area At the request of Mr. Rick Hager, Corporate Stewardship Program Director, Lewis Environmental Services, Inc. has prepared this master plan to assist the volunteer members of the Corporate Stewardship Citizens Committee with directing Tampa Electric Company's management of the environmentally sensitive lands that the company owns at this site.

The George-Anne, Georgia Southern University

The George-Anne

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Carbon And Nitrogen Isotopic Signatures Of Bat Guanos As A Record Of Past Environments, Hiroshi Mizutani, Donald A. Mcfarlane, Yuko Kabaya

WM Keck Science Faculty Papers

Carbon and nitrogen isotope ratios were measured for various ecogeochemical samples relevant to bat guano ecosystems. In particular, ca. 800-year-old subfossil guano from Jackson's Bay Cave Compex, Jamaica, yielded ratios similar to the modern guano from other Jamaican bat caves but quite different from modern guano of the same area. Diagenetic change and differences in bat food habits were unlikely explanations for the observation. Instead, insects that feed on C4 and CAM plants were the main prey for the bats in present Jackson's Bay area, while the ultimate source of organic matter for bats in other Jamaican caves and for …