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.

Forest management of eastern Oregon and Washington began in the late 1800s as extensive utilization of forests for grazing, timber, and irrigation water. With time, protection of these values developed into active management for these and other values such as recreation. Silvicultural and administrative practices, developed to solve problems at a particular time have lingered and created confusion and consternation when knowledge, values, and vegetation conditions have changed. The present condition of most eastern Oregon and Washington forests is the result of disturbance and regrowth...

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.

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.

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.

This report summarizes a 1992 timber resource inventory Of timberland outside National Forests in eastern Oregon. The report presents statistical tables of timberland area, timber volume, growth, mortality, and harvest. It also displays tables of revised 1986-87 timber resource statistics for timberland outside National Forests; the 1992 and 1986-87 tables may be compared to get valid estimates of change. Additionally, three supplemental tables provide a summary of changes between 1986-87 and 1992 in the timberland area and timber volume outside National Forests.

Principles for sustainable-ecosystem management are derived by integrating fundamental, societal, and scientific premises. Ecosystem science is applied in the design of a system of management focused on building overlap between what people collectively want and what is ecologically possible. We conclude that management must incorporate more science and societal processes in the system to better inform decisions and to learn by "managing as an experiment." A management model is proposed that laces together societal values and ecological capacity.

Country-wide estimates of forest biomass are the major driver for estimating and understanding carbon pools and flux, a critical component of global change research. Important determinants in making these estimates include the areal extent of forested lands and their associated biomass. Estimates for these parameters may be derived from surface-based data, photo interpretation or satellite remote sensing, with varying degrees of uncertainty. Ground data are typically aggregated by forest type, stand age, productivity level, and ownership. Survey priority is usually given to regions and...

Arctic tundra has been a net sink for carbon dioxide during historic and recent geological times1-4, and large amounts of carbon are stored in the soils of northern ecosystems. Many regions of the Arctic are warmer now than they have been in the past5-10, and this warming may cause the soil to change from a carbon dioxide sink to a source by lowering the water table11,12, thereby accelerating the rate of soil decomposition (CO2 source)3,13-15 so that this dominates over photosynthesis (CO2 sink). Here we present data indicating that the tundra on the North Slope of Alaska has indeed become...

Seeds from two full-sib families of ponderosa pine (Pinus ponderosa) with known differences in growth rates were germinated and grown in an ambient (350 µl l-1) or elevated (700 µl I-1) CO2 concentration. Gas exchange at both ambient and elevated CO2 concentrations was measured 1,6,39, and 112 days after the seed coat was shed. Initial stimulation of CO2 exchange rate (CER) by elevated CO2 was large (> 100%). On Day 1, CER of seedlings grown in elevated CO2 and measured at ambient CO2 was significantly lower than the CER of seedlings grown and measured at ambient CO2, indicating physiologic...