Fuel-Load Reductions Resulting from Prescribed Burning in Grazed and Ungrazed Douglas-Fir Stands
نویسندگان
چکیده
منابع مشابه
Estimating Structural Attributes of Douglas-Fir/ Western Hemlock Forest Stands from Landsat and SPOT Imagery
T o help determine the utility of satellite data for analysis and inventory of Douglas-fir~western hemlock forests west of the Cascade Mountains crest in Oregon and Washington, USA, we evaluate relationships between spectral and texture variables derived from SPOT HR V 10 m panchromatic and LANDSAT TM 30 m multispectral data and 16 forest stand structural attributes. Texture of the HRV data was...
متن کاملForest Restoration Using Variable Density Thinning: Lessons from Douglas-Fir Stands in Western Oregon
A large research effort was initiated in the 1990s in western United States and Canada to investigate how the development of old-growth structures can be accelerated in young even-aged stands that regenerated following clearcut harvests, while also providing income and ecosystem services. Large-scale experiments were established to compare effects of thinning arrangements (e.g., spatial variabi...
متن کاملBelowground carbon pools and processes in different age stands of Douglas-fir.
Forest floor material and soil organic matter may act as both a source and a sink in global CO2 cycles. Thus, the ecosystem processes controlling these pools are central to understanding the transfers of carbon (C) between the atmosphere and terrestrial systems. To examine these ecosystem processes, the effect of stand age on temporal carbon source-sink relationships was examined in 20-year-old...
متن کاملSession B—Fuel Management Strategies—Gray, Blackwell Fuel Management Strategies in 60-Year-Old Douglas-Fir/Ponderosa Pine Stands in the Squamish Forest District, British Columbia
The restoration of dry forest ecosystems in the Squamish Forest District in the past has focused on treating stands with no prior history of selective harvest and containing a large population of remnant historical stand structure. Many 60 to 90 year old stands that date to turn of the century selective harvest operations also exist in the district. These stands contain very high densities of D...
متن کاملBiophysical controls of carbon flows in three successional Douglas-fir stands based on eddy-covariance measurements.
We measured net carbon flux (F(CO2)) and net H2O flux (F(H2O)) by the eddy-covariance method at three Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)-western hemlock (Tsuga heterophylla (Raf.) Sarg.) sites located in the Wind River Valley of southern Washington State, USA. Stands were approximately 20, 40 and 450 years old and measurements were made between June 15 and October 15 of 1998 in ...
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ژورنال
عنوان ژورنال: Journal of Range Management
سال: 1983
ISSN: 0022-409X
DOI: 10.2307/3898484