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Articles 571 - 600 of 703

Full-Text Articles in Ecology and Evolutionary Biology

Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson Jan 1993

Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson

Aspen Bibliography

No abstract provided.


Cliff Lake Bench Research Natural Area: Problems Encountered In Monitoring Vegetation Change On Mountain Grasslands, Walter F. Mueggler Jan 1992

Cliff Lake Bench Research Natural Area: Problems Encountered In Monitoring Vegetation Change On Mountain Grasslands, Walter F. Mueggler

Aspen Bibliography

No abstract provided.


Armillaria Root Rot In The Canadian Prairie Provinces, K. I. Mallett Jan 1992

Armillaria Root Rot In The Canadian Prairie Provinces, K. I. Mallett

Aspen Bibliography

No abstract provided.


A Review Of Plant Introductions To The Kimberley 1955 To 1987, R Mccartney Nov 1991

A Review Of Plant Introductions To The Kimberley 1955 To 1987, R Mccartney

Grain and other field crops published reports

This report summarizes the work done by the Department of Agriculture, Western Australia, in the west and north Kimberley in introducing plant species during 1955-1987.

For the purposes of this repor1the following areas are defined thus:

• West Kimberley- lies between latitude 17°5 and 19°5 and longitude 121°E and 127°E, with an extension to the north of 1° between 121°E and I 24°20'E. The area is 118,000 km".

• North Kimberley - lies north of latitude 17°5 and between longitude 124°20'E and 127°30'E. The area is 85,000 km'.

• East Kimberley-lies north of latitude 19°5 and between longitude 127°30'E and …


The Effect Of Seasonal Cattle Grazing On California Bighorn Sheep Habitat Use, Melanie J. Steinkamp May 1990

The Effect Of Seasonal Cattle Grazing On California Bighorn Sheep Habitat Use, Melanie J. Steinkamp

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of seasonal cattle grazing on a newly reintroduced population of California bighorn sheep (Ovis canadensis californiana) in Big Cottonwood Canyon, Idaho, was studied. The hypothesis that bighorn sheep avoid cattle was tested. The issue of avoidance between bighorn sheep and livestock is arguable. Some studies have found that bighorn sheep avoid cattle while others have found no response of bighorn sheep to cattle.

Evidence was found to document the avoidance of cattle by bighorn sheep. The size of the bighorn's home range and core area decreased with the movement of cattle into areas of high bighorn …


The Benefits Of Weaning Cattle In The Kimberley, David Pratchett, Stuart Young May 1989

The Benefits Of Weaning Cattle In The Kimberley, David Pratchett, Stuart Young

Animal production and livestock research reports

The Kimberley region was populated with Shorthorn cattle from Queensland and New Sonth Wales in the 1880's. The descendants of these cattle known as Kimberley Shorthorn are still the predominant breed in the region. The relatively poor performance of these cattle under the harsh Kimberley conditions and the fact that changing the genotype can improve productivity was recently published (Pratchett D. WADA Journal No. 4 1988)

While the adoption of Bos indicus breeds is the correct move, improved husbandry can also increase the productivity of the Kimberley Shorthorn cow. The majority of cattle in the Kimberley are not weaned. Sometimes …


Deer And Forestry In Germany: Half A Century After Aldo Leopold, Michael L. Wolfe, Friedrich-Christian V. Berg May 1988

Deer And Forestry In Germany: Half A Century After Aldo Leopold, Michael L. Wolfe, Friedrich-Christian V. Berg

Aspen Bibliography

No abstract provided.


An Inventory And Condition Survey Of Rangelands In The Ashburton River Catchment, Western Australia, A A. Mitchell, A L. Payne, W F. Holman Jan 1988

An Inventory And Condition Survey Of Rangelands In The Ashburton River Catchment, Western Australia, A A. Mitchell, A L. Payne, W F. Holman

Technical Bulletins

The inventory and condition survey of rangelands in the Ashburton River catchment, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1976 and 1978, 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 …


Clonal Foraging In Perennial Wheatgrasses: A Strategy For Exploiting Patchy Soil Nutrients, L. D. Humphrey, D. A. Pyke Oct 1987

Clonal Foraging In Perennial Wheatgrasses: A Strategy For Exploiting Patchy Soil Nutrients, L. D. Humphrey, D. A. Pyke

Aspen Bibliography

1 Foraging by means of plasticity in placement of tillers in response to low- and high- nutrient patches was examined in the rhizomatous wheatgrass Elymus lanceolatus ssp. lanceolatus. Its ability to exploit soil nutrient patches was compared to that of the closely related but caespitose E. lanceolatus ssp. wawawaiensis. 2 Clones of 14 genets of each taxon were planted in boxes consisting of two 30 x 30 cm cells: the 'origin cell' where clones were planted, and the adjacent 'destination cell', with each cell containing soil with either low or high levels of nutrients. 3 The rhizomatous taxon, which can …


An Inventory And Condition Survey Of Rangelands In The Carnarvon Basin, Western Australia, A L. Payne, G F. Spencer, P J. Curry Jan 1987

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 …


Characteristics Of Successful Competitors: An Evaluation Of Potential Growth Rate In Two Cold Desert Tussock Grasses, Eissenstat D. M., Caldwell M. M. Jan 1987

Characteristics Of Successful Competitors: An Evaluation Of Potential Growth Rate In Two Cold Desert Tussock Grasses, Eissenstat D. M., Caldwell M. M.

Aspen Bibliography

Within the first few weeks after seedling emergence, Agropyron desertorum, a more competitive tussock grass, had a much higher mean relative growth rate (RGR) than Agropyron spicatum, a very similar, but less competitive species. However, beyond the early seedling stage, the two grasses had a remarkably similar whole-plant RGR in hydroponic culture and aboveground RGR in glasshouse soil, if root temperatures were above approximately 12° C. At soil temperatures between 5 and 12° C, A. desertorum exhibited a 66% greater aboveground RGR than A. spicatum (P < 0.05). Both species responded similarly to warming soil temperatures. In the field, however, tiller growth rates were generally similar. Neither species showed marked tiller elongation until a couple of weeks after snowmelt, by which time soil temperatures, at least to a depth of 10 cm, were above 12° C for a significant portion of the day. Above-ground biomass accumulation over a three-year period indicated that both grasses had similar potential growth rates whereas Artemisia tridentata ssp. vaseyana, a common neighbor planted in the same plots, had a much greater potential growth rate. The greater competitive ability of adult A. desertorum, as compared to A. spicatum, cannot be attributed to appreciable differences in potential growth rates.


Relationships Among Aspen, Fungi, And Ungulate Browsing In Colorado And Wyoming, John H. Hart Jan 1986

Relationships Among Aspen, Fungi, And Ungulate Browsing In Colorado And Wyoming, John H. Hart

Aspen Bibliography

No abstract provided.


Public Response To "Guidelines For Managing Aspen", Norbert V. Debyle Jan 1985

Public Response To "Guidelines For Managing Aspen", Norbert V. Debyle

Aspen Bibliography

No abstract provided.


Guidelines For Managing Aspen, The Aspen Panel Jan 1985

Guidelines For Managing Aspen, The Aspen Panel

Aspen Bibliography

No abstract provided.


Aspen Community Types Of Nevada, W. F. Mueggler Jan 1985

Aspen Community Types Of Nevada, W. F. Mueggler

Aspen Bibliography

No abstract provided.


Growth, Yield, And Enfor, Imre Bella Apr 1984

Growth, Yield, And Enfor, Imre Bella

Aspen Bibliography

Increasing public awareness about the state of forestry and concerns about present and future wood supplies are bringing about an intensification of forest management across the country.


The Secretive Silvereyes, I J. Rooke Jan 1984

The Secretive Silvereyes, I J. Rooke

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

Durinf the past five years the agricultural Protection Board, in co-operation with scientists from CSIRO's Division of Wildlife Research and the University of Western Australia, had studied the biology and control of the silvereye in the South-West of Western Asustralia. The project was partially funded by a voluntary levy on vignerons in the Margaret River and Mt Barker areas.

The first part of the study investigated the bird's bioloogy - its food requirements, reproductive rate, how it interacted with other birds and its seasonal movements, It was hoped that this knowledge would help develop effective techniques for either controlling the …


Preventing Vineyard Damage By Silvereyes, I J. Rooke Jan 1984

Preventing Vineyard Damage By Silvereyes, I J. Rooke

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

In the previous article, Dr I Rooke outlined the studies which helped to devise practical ways of controlling attacks by silvereyes on vineyards in the South-West of Western Australia. The preventative methods vignerons can use are discussed here.


Keeping Starlings Out Of W.A, John L. Long Jan 1984

Keeping Starlings Out Of W.A, John L. Long

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

In Europe and North America huge flocks of starlings cause millions of dollars worth of damage to grain and fruit crops each year and large sums of money are spent trying to control them.

Starlings were introduced into australia in the late 1890s when more than 200 birds were released near Melbourne. They are now well established over much of eastern Australia, ranging from central Queensland, south to Tasmania and along the Great Australian Bight to the South Australian-Western Australian border, occasionally crossing it and sometimes moving as far west as the Esperance region on the south coast.

Some people …


The Role Of New York State's Division Of Fish And Wildlife In Deer Damage Control, Louis T. Berchielli Sep 1983

The Role Of New York State's Division Of Fish And Wildlife In Deer Damage Control, Louis T. Berchielli

Wildlife Damage Management Conference

The Environmental Conservation Law (ECL) spells out the responsibilities and authorities of the Department of Environmental Conservation (DEC). Section 1-0101, subdivision 3 of the ECL declares a State policy which includes the fostering, promoting, creating and maintaining of conditions under which humans and nature can thrive in harmony. Section 11-0303, subdivision 1 of the ECL vests in the department the efficient management of the wildlife resources of the State. The department is further directed by subdivision 2 of this section to include regard to the compatibility of production and harvesting of wildlife crops with other necessary or desirable land uses …


Aspen Management Guidelines For The Grand Mesa, Uncompahgre And Gunnison National Forest, Aspen Management Task Force Jan 1983

Aspen Management Guidelines For The Grand Mesa, Uncompahgre And Gunnison National Forest, Aspen Management Task Force

Aspen Bibliography

A task force was formed in late April 1983 for the purpose of developing guidelines for Aspen Management on the Grand Mesa, Uncompahgre and Gunnison National Forests.


Understory-Overstory Vegetation Relationships: An Annotated Bibliography, Peter F. Ffolliott, Warren P. Clary Jan 1982

Understory-Overstory Vegetation Relationships: An Annotated Bibliography, Peter F. Ffolliott, Warren P. Clary

Aspen Bibliography

No abstract provided.


The Extent And Characteristics Of Low Productivity Aspen Areas In Minnesota, Garhard K. Raile, Jerold T. Hahn Jan 1982

The Extent And Characteristics Of Low Productivity Aspen Areas In Minnesota, Garhard K. Raile, Jerold T. Hahn

Aspen Bibliography

No abstract provided.


An Experiment In Biomass Production: Results From Three Consecutive Harvests Of Cottonwood Alder, Constance A. Harrington, Dean S. Debell, Robert F. Strand Jan 1982

An Experiment In Biomass Production: Results From Three Consecutive Harvests Of Cottonwood Alder, Constance A. Harrington, Dean S. Debell, Robert F. Strand

Aspen Bibliography

No abstract provided.


Biomass Equations For Ten Major Tree Species Of The Prairie, T. Singh Jan 1982

Biomass Equations For Ten Major Tree Species Of The Prairie, T. Singh

Aspen Bibliography

No abstract provided.


Wildlife Conservation In The Soviet Union, Michael L. Wolfe, Douglas R. Weiner Jan 1982

Wildlife Conservation In The Soviet Union, Michael L. Wolfe, Douglas R. Weiner

Aspen Bibliography

No abstract provided.


Wildlife--Wild Death: Kenya's Man-Animal Equation, Norman N. Miller Jan 1982

Wildlife--Wild Death: Kenya's Man-Animal Equation, Norman N. Miller

Aspen Bibliography

Kenya's game laws, in comparison to those of ancient England, are tame and mild.


Alternate Population Limitation Strategies For Feral Horses, Michael L. Wolfe Apr 1981

Alternate Population Limitation Strategies For Feral Horses, Michael L. Wolfe

Aspen Bibliography

No abstract provided.


Physiological Research On Adventitious Shoot Development In Aspen, George A. Schier Jan 1981

Physiological Research On Adventitious Shoot Development In Aspen, George A. Schier

Aspen Bibliography

No abstract provided.


Ecology And Regeneration Of Aspen In Relation To Managment, R.K. Tew Jan 1981

Ecology And Regeneration Of Aspen In Relation To Managment, R.K. Tew

Aspen Bibliography

No abstract provided.