Treesearch

This proceedings contains contributions from each author or group of authors who presented their current research at the bark beetle genetics workshop held 17-18 July 1998 on the campus of the University of Wisconsin in Madison, Wisconsin, USA. This was the second meeting on this subject; the first was held in 1992. The subject of bark beetle genetics is of growing, international interest; researchers from Austria, Hungary, and Mexico, as well as from across the United States have contributed to this proceedings. The topics covered included molecular approaches to genetic analysis of bark...

This paper reviews the methodology used to derive the original estimates for direct employment associated with recreation on Federal lands in the interior Columbia River basin (the basin), and details the changes in methodology and data used to derive new estimates. The new analysis resulted in an estimate of 77,655 direct-effect jobs associated with recreational activities on Federal lands in the basin. This estimate is a little over one-third of the previous estimate. The new estimated direct-effect recreational jobs amount to 4.48 percent of the total estimated jobs in the basin in...

We hypothesized that the relative availability of meat, indicated by contribution to the diet, would be positively related to body size and population productivity of North American brown, or grizzly, bears (Ursus arctos). Dietary contributions of plant matter and meat derived from both terrestrial and marine sources were quantified by stable-isotope analysis (ä3C and ä15N) of hair samples from 13 brown bear populations. Estimates of adult female body mass, mean litter size, and population density were obtained from. two field studies of ours and from other published reports. The population...

This paper examines the costs of meeting explicit targets for increments of carbon sequestered in forests when both forest management decisions and the area of forests can be varied. Costs are estimated as welfare losses in markets for forest and agricultural products. Results show greatest change in management actions when targets require large near-term flux increments, while land area change is largest when long-term increments are needed, Marginal costs per tonne of carbon flux do not vary greatly with the form of the target and are similar to findings of earlier studies for comparable...

Land use planning often is implemented to control development on forests and farmland, but its impact on land use remains untested. Previous studies evaluating such programs have relied on anecdotal evidence rather than on data describing actual land use change. A model of land use is specified as a function of socioeconomic factors, land rent, and landowners' characteristics, to examine how well Oregon's land use planning program has protected forests and farmland from development. The empirical model describes the probability that forests and farmland in western Oregon and western...

Provides current information on lumber and plywood production and prices; employment in the forest industries: international trade in logs, lumber, and plywood; volume and average prices of stumpage sold by public agencies: and other related items.

Ponderosa pine (Pinus ponderosa Dougl. ex Laws.) killed as part of a forest management project to reduce dwarf mistletoe (Arceuthobium sp.) in the Gila National Forest, New Mexico, were evaluated for wildlife value. One hundred and two dwarf mistletoe-infected trees were killed by basal burning, basal girdling, or by a combination of the two. Trees began to fall within 2 years. Most killed trees (96 percent) served as forage substrate for woodpeckers. Twenty percent of the trees contained woodpecker nest cavities and stood longer than small-diameter trees. The probability of cavity...

Wildland-urban interface (WUI) residents in Michigan were interviewed using a contingent valuation protocol to assess their-willingness-to-pay (WT) for incremental reductions in the risk of losing their homes to wildfire. WTP was elicited using a probability model which segments the risk of structure loss into "public" and "private" components. Most respondents expressed positive WTP for publicly funded risk reduction activities. These respondents were characterized by tolerance for property taxes, perception of significant risk, high ranking of fire risk relative to other hazards, and...

The Northwest economic adjustment initiative (NWEAI) provides economic assistance to a region including western Washington, western Oregon, and northern California. Timber harvests have fallen markedly in this region since 1990. The forest products industry is the largest manufacturing sector in the region, and employment has followed the downward trend in timber harvest. There are important differences in the declines in timber harvest, employment, and the importance of the forest products industry at the county level. The NWEAI is a significant initiative designed to coordinate and...

The Forest Ecosystem Study (FES) came about as an early response to the need for innovative silvicultural methods designed to stimulate development of late-successional attributes in managed forests—a need ensuing from the exceptional and longstanding controversies over old-growth forests and endangered species concerns in the Pacific Northwest. In 1991, scientists with the FES applied experimental, variable density thinning to even-aged Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) forests on the Fort Lewis Military Reservation in western Washington after having first accumulated...