Treesearch

An Aget Cyclone dust collector and peripheral equipment were fieldtested for use in vacuuming large quantities of pollen from 30- to 40-foot trees in a Douglas-fir seed orchard. The Cyclone machine (Model 20SN31P) operated without a vacuum bag or filter device, so no blockage or reduction in vacuum efficiency occurred when large volumes of pollen were collected. Vacuum heads were fabricated out of sheet metal, aluminum or Lexan plastic. The Lexan head was preferred because it was durable and weighed only 12 ounces. Lightweight extension poles and hose permitted workers on the ground to...

We compared the composition and density of the on-site vegetation, seed bank, and seed rain of three geomorphic and successional surfaces along third- and fifth-order streams on the western slope of the central Cascade Range in Oregon.The on-site vegetation generally was dominated by tree species, the seed bank by herb species, and the seed rain by tree and herb species. Seed rain density generally corresponded to the successional stage of the geomorphic surface and frequency of site disturbance, with the youngest and least vegetatively stable geomorphic surfaces having the highest density...

Statistics on forest area, total gross and net volumes, and annual net growth and mortality are presented from the 1984-85 timber inventory of the Ketchikan Area, Tongass National Forest, Alaska. Available timberland area is estimated at 1.5 million acres, net growing stock volume at 8.2 billion cubic feet, and annual net growth and mortality at 24.8 and 65.6 million cubic feet, respectively.

Methods describing how to sample aquatic and semiaquatic amphibians in small streams and headwater habitats in the Pacific Northwest are presented. We developed a technique that samples 10-meter stretches of selected streams, which was adequate to detect presence or absence of amphibian species and provided sample sizes statistically sufficient to compare abundance of individual species among streams. Physical and biological parameters of streams are described as well as ways to collect amphibians effectively. The system can be modified for use in a variety of waterways and for different...

The 1987 inventory of the forest resources of the Kenai Peninsula was designed to assess the impact of the spruce beetle (Dendroctonus rufipennis (Kirby)) on the timberland component of the forest resource. Estimates of timberland area, volumes of timber, and growth and mortality of timber were developed. These estimates of timber resource quantities were also categorized by owner. Total timberland area was estimated at 482 thousand acres. Cubic volume on this timberland was estimated at 1,211,577 thousand cubic feet. Timber growth and mortality were estimated at 9,245 and 7,958 thousand...

A list of publications resulting from research at the Cascade Head Experimental Forest and Scenic Research Area, Siuslaw National Forest, Oregon, from 1934 to 1990 is presented. Over 200 publications are listed, including papers, theses, and reports. An index is provided that cross-references the listings under appropriate keywords.

The paper is a practical guide to field methodology for conducting a radio telemetry study of spotted owls (Strix occidentalis) in mountainous terrain. It begins with a synopsis of spotted owl biology and basic telemetry. The criteria used to select which owls will carry transmitters are discussed as are location and capture methods. Instructions for attaching transmitters and recommendations for general, night, and aerial telemetry are presented. Suggestions are given for controlling data quality, for researcher training and safety, and for field interpretation of radio signals. Equipment...

A variety of potent air toxins are in the smoke produced by burning forest and range biomass. Preliminary data on flrefighter exposures to carbon monoxide and formaldehyde at four prescribed burns of Western United States natural fuels are presented. Formaldehyde may be correlated to carbon monoxide emissions. The firefighters' exposures to these compounds relative to workplace standards are discussed.

This report summarizes a 1989 timber resource inventory of five counties in the Olympic Peninsula region of Washington: Clallam, Grays Harbor, Jefferson, Mason, and Thurston. Detailed tables of forest area, timber volume, growth, mortality, and harvest are presented.

Seasonal variation is found in monthly stumpage price data. Seasonal adjustments indicate that monthly adjustments improve the utility of estimates of monthly stumpage prices. Comparisons of adjusted and unadjusted prices suggest that the unadjusted price series are reasonably robust.