Stand age, defined in terms of Pacific Northwest forests, is not necessarily the best criterion for identifying for conservation mangrove forests or any forest outside the Pacific Northwest. No single stand will have all old-growth characteristics, and even if they are present in a stand, these...
An area of old-growth forests in California, Oregon, and Washington has declined significantly in the second half of the 20th century. The report summarizes available information on old-growth forest area by ownership in California, Oregon, and Washington. Old-growth definitions used by the various...
Spotted owls(斑点猫头鹰) live in old-growth forests in the western United States and act as an indicatorspecies, a measure of the biological health of_1_ area, for public land management.The species is_2_(particular) allergic to logging, and the northern subspecies of spotted owl 3_(list)...
The most common approach to defining mature and old-growth forests is to place them in a successional continuum of increases in tree size, biodiversity, habitat niches, and structural diversity with forest age. Time since severe disturbance, including human impact, is often a consideration, although...
Redwood National Park, national park in the northwestern corner of California, U.S. It was established in 1968, with a boundary change in 1978, and was designated a World Heritage site in 1980. Preserving virgin (old-growth) groves of ancient redwood tre
2012. Governing old-growth forests: the interdepen- dence of actors in Great Bear Rainforest in British Columbia. Soc Nat Res Int J. 25:900-914.Raitio, Kaisa, and Heli Saarikoski. 2012. "Governing Old-Growth Forests: The Interde- pendence of Actors in Great Bear Rainforest in British...
Old- growth forests remove carbon dioxide from the atmosphere(1,2) at rates that vary with climate and nitrogen deposition(3). The sequestered carbon dioxide is stored in live woody tissues and slowly decomposing organic matter in litter and soil(4). Old- growth forests therefore serve as a ...
Cross-dated ring counts on Douglas-fir (Pseudotsuga menziesii) stumps were used to reconstruct the early development of old-growth forests northeast of Mount St. Helens, Washington, following catastrophic forest disturbance by tephra fallout from a large eruption in A.D. 1480. In addition to docum...
All Forest Service Stations and Regions began developing old-growth definitionsfor specific forest types. Definitions will first be developed for broad forest
To investigate the differences in understorey composition and diversity between old-growth and managed forests, we analyzed an old-growth and a managed beech stand in the same area displaying similar abiotic features. We considered variations in understorey species composition and richness. The sampled...