Treesearch

Includes 41 papers and accounts of field trips from a symposium focused on riparian shrub communities and their habitats. Papers discuss values, classification methods, conditions, and rehabilitation techniques for riparian areas, with one section devoted to similar topics for upland shrubs.

A simple regional habitat model founded on the relation between vertical habitat complexity and species richness has been used to describe wildlife habitat in response to macroscale patterns in land use and land cover. While the model has a basis in ecological theory, it has not been subjected to rigorous testing. We evaluated the model’s fundamental assumption on landscapes in the eastern forested region of the United States and found the model to be supported when we used a measure of avian community integrity during the breeding season. The model was improved by incorporating measures...

Wildlife management and policy decisions are increasingly being made at the regional, national and international level. Much of the motivation for extending the geographic context of resource planning comes from U.S. federal laws that require resource managing agencies to examine the potential impacts from land resource use on wildlife resources. Several regional approaches have demonstrated the feasibility of using extant resource inventories in developing wildlife habitat models. While testing for feasibility is a logical first step in the development of large-scale resource response...

Provides information on fire as an ecological factor in the forest habitat types occurring in eastern Idaho and western Wyoming. Identifies Fire Groups based on fire's role in forest succession. Describes forest fuels and suggests considerations for fire management.

This paper reviews the science and management of old-growth forests and summarizes discussions among 30 participants at a workshop in Portal, Arizona, March 9-13, 1992. Concepts of old-growth forests - the perceptions, values, definitions, characteristic features, ecological functions, and landscape importance - vary widely. Because concepts are complex, scientists, resource managers, and the public will continue to bring old growth into clearer focus as knowledge is gained. Regardless of the concepts chosen for viewing old growth, on an ecological basis old-growth forests represent a...

The University of Idaho Forest Research Nursery was established in 1909 to grow bareroot (field-grown) tree and shrub seedlings for conservation. In 1982, the bareroot production was phased out and replaced by growing seedlings in containers in greenhouses. The nursery emphasizes teaching, research and service. Students learn about forest planting; scientists conduct research to improve seedling quality, survival and growth; and seedlings are produced each year for the state of Idaho, private industry, and the general public. The 15-acre nursery site is located one mile east of Mountain...

This symposium focused on technologies that bridge the gap between research and its application in the management of woodlands. Topic areas include: ecology and silvicutural practices; growth, yield, and utilization potentials; livestock and grazing practices; wildlife habitat and values; and hydrology and watershed management. The proceedings include titles and abstracts of all papers in Spanish, a bibliography, and a summary of research needs.

The mountains of southeastern Arizona support a large diversity of vegetative plant communities ranging from grassland and desert scrub to spruce-fir forests. These vegetation types provide appropriate conditions for a number of species of vertebrates. Although vertebrates have been the subject of numerous studies in this region, most studies were restricted to one species, one mountain range, or one season. This limited scale of observation precludes generalizations of habitat associations between species and their environments.

Onion Park is a floristically rich naturally occurring mountain meadow and wetland complex which is surrounded by subalpine forest. The grass- and wetlands comprising the Park contribute biological diversity to an otherwise predominantly lodgepole pine-forested, subalpine setting. Onion Park is located at 7400' elevation in the Little Belt Mountains, five miles west of the town of Neihart, Meagher County, Montana. It is within the USDA Forest Service Tenderfoot Creek Experiment Forest on the Lewis and Clark National Forest. A 1,173 acre Research Natural Area (RNA) encompassing Onion Park...

To better understand the properties of ice surfaces at different temperatures, the adsorption of a relatively insoluble gas, NO, was studied using a continuous-flow column experiment. Adsorption isotherms for NO on the surface of ice were measured for a temperature range of-1 to -70°C and a concentration range of 10 to 250 ppbv. Very little adsorption was measured; surface concentrations were near the detection limit of +- 10-10 g m-2, limiting the precision of the data. Although a relatively large proportion of ice-ice surfaces were present, no grain boundary effect was detectable. NO...