Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 11401 - 11430 of 12146

Full-Text Articles in Life Sciences

Seed-Eating Birds, H. R. Pulliam Jan 1979

Seed-Eating Birds, H. R. Pulliam

Memorandum

No abstract provided.


Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage Jan 1979

Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage

Memorandum

No abstract provided.


Plant Food Habits Of Rodents In Curlew Valley, E. L. Becker Ii, D. F. Balph, M. H. Balph Jan 1979

Plant Food Habits Of Rodents In Curlew Valley, E. L. Becker Ii, D. F. Balph, M. H. Balph

Memorandum

No abstract provided.


Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman Jan 1979

Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman

Memorandum

No abstract provided.


Rodent Seed-Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown, D. W. Davidson Jan 1979

Rodent Seed-Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown, D. W. Davidson

Memorandum

No abstract provided.


Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, J. E. Kinnear, T. L. Ackerman, H. O. Hill Jan 1979

Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, J. E. Kinnear, T. L. Ackerman, H. O. Hill

Memorandum

No abstract provided.


Primary Production And Carbon Allocation In Creosotebush: Validation Of The Model, G. L. Cunningham, J. F. Reynolds Jan 1979

Primary Production And Carbon Allocation In Creosotebush: Validation Of The Model, G. L. Cunningham, J. F. Reynolds

Memorandum

No abstract provided.


Jornada Validation Site Report, W. G. Whitford Jan 1979

Jornada Validation Site Report, W. G. Whitford

Memorandum

No abstract provided.


Tucson Basin Validation Site Report, J. L. Thames Jan 1979

Tucson Basin Validation Site Report, J. L. Thames

Memorandum

No abstract provided.


Rock Valley Validation Site Report, F. B. Turner Jan 1979

Rock Valley Validation Site Report, F. B. Turner

Memorandum

No abstract provided.


Impact Of Grazing On Foothill Vegetation, K. C. Hodgkinson, P. S. Johnson Jan 1979

Impact Of Grazing On Foothill Vegetation, K. C. Hodgkinson, P. S. Johnson

Memorandum

No abstract provided.


User's Manual For Desert2: A Desert Ecosystem Simulator Written In Ansi Fortran Iv, W. D. Valentine Jan 1979

User's Manual For Desert2: A Desert Ecosystem Simulator Written In Ansi Fortran Iv, W. D. Valentine

Memorandum

No abstract provided.


Managing Water-Repellent Soils, D A. Mcghie Jan 1979

Managing Water-Repellent Soils, D A. Mcghie

Journal of the Department of Agriculture, Western Australia, Series 4

A study of water-repellent soils has led to some management recommendations.


Erosion Risks With High Stocking Rates At Kojonup Trial, Department Of Agriculture, Western Australia Jan 1979

Erosion Risks With High Stocking Rates At Kojonup Trial, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

A pasture grazing trial at Kojonup dramatically illustrated the effects of Cyclone Alby. Severe erosion was evident on the heavily stocked plots while the more lightly stocked plots showed little damage.


The Distribution Of Cadmium, Chromium And Lead In Crabs, Clams And Oysters From Calcasieu Estuary, Louisiana, Fritz Jaenike Jan 1979

The Distribution Of Cadmium, Chromium And Lead In Crabs, Clams And Oysters From Calcasieu Estuary, Louisiana, Fritz Jaenike

Masters Theses

In November 1978, specimens of oysters (Crassostrea virginica), clams (Rangia cuneata), crabs (Callinectes sapidus) and water and sediment samples were collected from Calcasieu Estuary, Louisiana. The concentrations of cadmium, chromium and lead were determined in the samples with an inductively coupled argon plasma direct reading emission spectrophotometer. Crab claw muscle, gill and carapace tissues were analyzed separately. Oysters and clams were separated into shell and whole soft tissue samples which were analyzed separately. The concentration order of the metals in crab carapace and in oyster shells was similar to that of the sediments, (Pb …


Potential Use Of Hydroelectric Facilities For Manipulating The Fertility Of Lake Mead, Larry J. Paulson, John R. Baker, James E. Deacon Jan 1979

Potential Use Of Hydroelectric Facilities For Manipulating The Fertility Of Lake Mead, Larry J. Paulson, John R. Baker, James E. Deacon

Publications (WR)

Analysis of historical nutrient data for Lake Mead indicates that the fertility of the reservoir has decreased which may be the cause for a corresponding decline in the largemouth bass population. However, it appears that fertility can be manipulated by altering the operation of the dam. The depletion of nutrients in the euphotic zone by phytoplankton and subsequent accumulation in the hypolimnion during summer and fall provide a natural nutrient gradient from which water of varying fertility can be drawn for discharge. This combined with alterations in the depth or seasonal pattern of discharge can possibly be used to enhance …


Niobrara-Missouri River Fishery Investigations, Larry W. Hesse, Gene Zeurlein, Roger Vancil, Leonard Koziol, Brad Newcomb, Leigh Ann Retelsdorf Jan 1979

Niobrara-Missouri River Fishery Investigations, Larry W. Hesse, Gene Zeurlein, Roger Vancil, Leonard Koziol, Brad Newcomb, Leigh Ann Retelsdorf

Nebraska Game and Parks Commission: Publications

The Niobrara River heads in the table lands of eastern Wyoming and flows 786 kilometers (km) eastward across Nebraska joining the Missouri River near the town of Niobrara, Nebraska. The Niobrara is the largest Missouri River tributary between the last two mainstem impoundments (Lake Francis Case and Lewis and Clark Lake). Fish movement up the Niobrara is prevented by Nebraska Public Power District's (NPPD's) Spencer Hydroelectric Dam, 63.3 km upstream from the river mouth. The lower reach of the river is turbid and carries a considerable load of sand, silt, and organic debris into the Missouri River. The mean annual …


Nebraska Rainbow Trout, Nebraska Game And Parks, G. Zeurlein, L. Hesse, J. Seeb, L. Wishard Jan 1979

Nebraska Rainbow Trout, Nebraska Game And Parks, G. Zeurlein, L. Hesse, J. Seeb, L. Wishard

Nebraska Game and Parks Commission: Publications

Chapter 1 Lethal and Preferred Temperatures of Lake McConaughy Rainbow Trout Versus Domestic Strain Rainbow Trout By R. Vancil, G. Zuerlein and L. Hesse

Chapter 2 A Nitrifying Filter-Cooling Condenser System for Total Water Re-use in Cold-Water Fish Holding or Rearing Applications By L. Hesse, G. Zuerlein and R. Vancil

Chapter 3 Biochemical Genetic Analysis of Two Strains of Nebraska Rainbow Trout By J. Seeb and L. Wishard

The self-sustaining rainbow trout population living in Lake Mcconaughy and the North Platte River tributaries is unique to the Great Plains region. The population spends most of its adult life in the …


Saving The State From Rabbits, Department Of Agriculture, Western Australia Jan 1979

Saving The State From Rabbits, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

A thoughtful look at the rise and fall of rabbit populations in Western Astralia and the work done to achive the current levels.


Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie Jan 1979

Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie

Grain and other field crops research reports

The regional crop variety testing programme conducted by the Western Australian Department of Agriculture covers the final two stages of a four stage process of evaluating locally produced crossbreds and introduced material comprising:-

Plant Breeder Trials

Stage 1: Initial small plot yield tests on early generation material - 1 to 3 sites. Stage 2: Small plot yield tests on selected material (F5 derived) - 3 to 4 sites.

Regional Testing Programme

Stage 3: Large scale preliminary trials - 9 to 10 sites. Stage 4: Large scale final yield trials - 40 to 50 sites.

The basis of the regional programme …


Sand Dune Project Stabilises Erosion, Department Of Agriculture, Western Australia Jan 1979

Sand Dune Project Stabilises Erosion, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

Read how the Department of Agriculture's Soil Conservation Service and the Department of Conservation and Environment worked with the Rockingham Shire to upgrade the road and protect the sand dunes.


Contour Cultivation : Cheap Erosion Control, T R. Negus, B. Barrett Jan 1979

Contour Cultivation : Cheap Erosion Control, T R. Negus, B. Barrett

Journal of the Department of Agriculture, Western Australia, Series 4

Although the benefits of contour cultivation are well recognised, it makes cultivation more difficult, particularly if the paddock is split by contour banks and grassed waterways. However, a comparison east of Pingelly indicates that contour cultivation is little more expensive or time-consuming than ordinary cultivation.


Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose Jan 1979

Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose

Biological Sciences Faculty Publications

Recently, Schaffer and Tamarin (1973) proposed a model relating changes in reproductive effort (RE) to fluctuating densities in microtine rodents (lemmings and voles). They assumed (and presented data supporting this assumption) that the major effect of increased crowding would be a reduction in survival among prereproductives, thereby lowering the effective fecundity (Schaffer and Rosenzweig 1977) of their parents. As a consequence, Schaffer and Tamarin argued that the optimal reproductive expenditure, E(N), should decline with increasing population size, N. They also deduced the shape of the zero-growth isocline, N*(E), for differing levels of RE and plotted both E(N) and N*(E) on …


The Prairie Naturalist Volume 10, Number 4. December 1978 Dec 1978

The Prairie Naturalist Volume 10, Number 4. December 1978

The Prairie Naturalist

THE ORNITHOGEOGRAPHY OF THE GREAT PLAINS STATES ▪ Paul A. Johnsgard

CAPTURE OF GRAY PARTRIDGE BY FALCONRY IN NORTH DAKOTA ▪ John W. Schulz

INCUBATION RHYTHMS AND EGG TEMPERATURES OF AN AMERICAN GREEN-WINGED TEAL AND A RENESTING PINTAIL ▪ Alan D. Afton

TEMPORAL PATTERNS OF SPRING MIGRATION OF YELLOW-HEADED BLACKBIRDS IN NORTH DAKOTA ▪ Richard D. Crawford

CHECKLIST OF NORTH DAKOTA MAMMALS: COMMENTS ON STATUS AND DISTRIBUTION OF SPECIES ▪ Robert W. Seabloom

NOTE

First Nesting Record of Cattle Egret and Little Blue Heron in North Dakota ▪ Lloyd A. Jones

BOOK REVIEWS

Geese of the World ▪ Carl E. …


The Maine Coast : Issues Considered, Maine Coastal Program Oct 1978

The Maine Coast : Issues Considered, Maine Coastal Program

Maine Collection

The Maine Coast : Issues Considered - A Report to the Governor by his Advisory Committee on Coastal Development and Conservation

Maine Coastal Program, Maine State Planning Office

Augusta, Maine (31 October 1978)

Contents: Introduction / Summary of Committee Recommendations / Fisheries / Port Development / Heavy Industry Siting / Travel and Tourism / Cumulative Impact of Development / Natural Resource Information Transfer


Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer Oct 1978

Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer

KWRRI Research Reports

This project was designed to determine the effects of nitrogen fertilization on the quality and quantity of streamflow eminating from an eastern hardwood forest watershed. A 40.67 ha watershed, located in mountainous eastern Kentucky, was aerially fertilized in late April 1975. The forest stand was principally oak, hickory, and yellow poplar, 50 - 55 years of age and in a relatively undisturbed condition. A helicopter applied anunonium nitrate at a rate of 504 kg/ha. Because a large part of applied nitrogen fertilizer ends up in the highly mobile nitrate nitrogen.form, this is the principal ion monitored in this study. No …


State Of The Fisheries Report 1977, Department Of Fisheries And Wildlife, Western Australia Sep 1978

State Of The Fisheries Report 1977, Department Of Fisheries And Wildlife, Western Australia

Status Reports of the Fisheries and Aquatic Resources

The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.


The Prairie Naturalist Vol. 10, No. 3. September 1978 Sep 1978

The Prairie Naturalist Vol. 10, No. 3. September 1978

The Prairie Naturalist

NOTES ON DISTRIBUTION OF THREE SPECIES OF MAMMALS IN SOUTH DAKOTA ▪ J. K. Jones, Jr., J. R. Choate and R. B. Wilhelm

A MID-CONTINENT IRRUPTION OF CANADA LYNX, 1962-63 ▪ H. L. Gunderson

CHECKLIST OF NORTH DAKOTA MAMMALS (REVISED) ▪ J. M. Wiebe and J. F. Cassel

DECLINE OF YEAR-CLASS STRENGTH OF BUFFALO FISHES IN LAKE SAKAKAWEA, NORTH DAKOTA ▪ D. W. Willis and J. B. Owen

NOTE

Pileated Woodpecker Eating Russian Olive Fruits ▪ R. S. McVoy

BOOK REVIEWS

Birds of the Prairie Provinces ▪ W. J. Maher

Wildlife of the Prairies ▪ C. R. Grondahl

Distribution Patterns …


"Toxic Chemicals In The Environment", William E. Cooper Jun 1978

"Toxic Chemicals In The Environment", William E. Cooper

Special Collections: Oregon Public Speakers

Presented and recorded with Arbib, M. A., "Environmental Simulation and Long-Term Planning."


The Prairie Naturalist Vol. 10, No. 2. June 1978 Jun 1978

The Prairie Naturalist Vol. 10, No. 2. June 1978

The Prairie Naturalist

ANALYSIS OF THE FLEHMEN DISPLAY IN AMERICAN BISON (BISON BISON) ▪ B. R. Mahan, M. P. Munger and H. L. Gunderson

AVIAN MORTALITY CAUSED BY A SEPTEMBER WIND AND. HAIL STORM ▪ K. F. Higgins and M. A. Johnson

DISTRIBUTION OF TWO SPECIES OF LONG-EARED BATS OF THE GENUS MYOTIS ON THE NORTHERN GREAT PLAINS ▪ J. K. Jones, Jr. and J. R. Choate

ALFALFA AND THE OCCURRENCE OF FISSURES ON THE NORTH DAKOTA PRAIRIES ▪ J. P. Bluemle, A. E Kehew, E. A. Brostuen and K. L. Harris

NOTES

An Observation of Badger Predation on Richardson Ground Squirrels ▪ …