Treesearch

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. View an updated online version of this publication with downloadable excel files athttps://www.fs.usda.gov/pnw/ppet/.

This document presents two spatial scales of a hierarchical, ecoregional framework and provides a connection to both larger and smaller scale ecological classifications. The two spatial scales are subregions (1:250,000) and landscape-level ecoregions (1:100,000), or Level IV and Level V ecoregions. Level IV ecoregions were developed by the Environmental Protection Agency because the resolution of national-scale ecoregions provided insufficient detail to meet the needs of state agencies for establishing biocriteria, reference sites, and attainability goals for water-quality regulation. For...

Resource assessments on wildlife viability, old-growth timber volume estimates, forested wetlands, and slope stability are presented. These assessments were used in the formulation of alternatives in the revision of the Tongass land management plan.

This paper tracks the recent history of planning, management, and litigation regarding northern spotted owls and their habitat on Federal public lands since the 1989 Interagency Scientific Committee to Address the Conservation of the Northern Spotted Owl (ISC). The ISC report and subsequent plans sparked many economic analyses, appeals, lawsuits, forest management plans, and counterplans. Federal assessments and planning efforts eventually led to the current Northwest Forest Plan which considers owls in the context of ecological and human communities under the rubric of ecosystem management.

Forest sustainability is a concept for the desired condition of forest ecosystems all over the world. The essential aspects of sustainable forests differ tremendously, however, among peoples of the world. Parks and wilderness areas, wildlife preserves, watershed protection areas, multiple-use forestry, and short-rotation tree farming all are sustainable, from some viewpoints, when inflows and outflows balance over time. Sustainability needs to be defined to minimize conflict, confusion, and mistrust. For what, where, whom, and how long are forest values being sustained? One recommended...

Research information needs on selected invertebrates and all vertebrates of the interior Columbia River basin and adjacent areas in the United States were collected into a research, development, and application database as part of the Interior Columbia Basin Ecosystem Management Project. The database includes 482 potential research study topics on 232 individual species and 18 species groups of animals, representing significant gaps in scientific knowledge. Research study topics in the database can be retrieved by use of keyword searches. Keyword subjects include basic ecology, distribution...

This publication provides qualitative and quantitative information on five distinct structures: living trees with decayed parts, trees with hollow chambers, trees with brooms, dead trees, and logs. Information is provided on the value of these structures to wildlife, the decay or infection processes involved in the formation of these structures, and the principles to consider for selecting the best structures to retain.

Silvicultural prescriptions to enhance northern flying squirrel (Glaucoinys sabrinus) habitat have been suggested as an aid for recovery of the threatened northern spotted owl (Strix occidentalis caurina). Flying squirrels are hypothesized to be limited by den sites (cavities in trees) and by food (truffles). However, no quantitative information exists on den sites of flying squirrels. Therefore, during 1986-94, we used radiotelemetry to locate 604 different den sites in the southern Coast Range of Oregon, the southern Olympic Peninsula, and the Puget Trough of Washington. Den sites...

In the Pacific Northwest, the northern flying squirrel, Glaucomys sabrinus, sumes sporocarps of a wide variety of hypogeous mycorrhizal fungi(truffles). Numerous other foods are also consumed but are not well characterized by fecal pellet analysis either because they are more fully digested (seeds, nuts, fruits, vegetation) or because of the similarity among spore types (lichen photobionts, epigeous fungi). Thus, observations of squirrel foraging are important in characterizing non-truffle dietary components. As part of a trapping and telemetry study, we observed G. sabrinus foraging on 63...

Two methods of analyzing the dietaries of mycophagous small mammals were compared. Fecal pellets were collected from 11 northern flying squirrels and 12 Townsend's chipmunks, all caught live. In 1 method, pellets from each individual were examined microscopically; in the other, samples from 3 or 4 individuals from each species were pooled and the number of slides and the fields of view used for each slide were reduced, resulting in less time and effort to collect data. Diet analysis by the two methods did not differ significantly for either mammal species.