Riparian areas that can be used as reference sites on which to base goals of vegetation restoration have not been documented in the Oregon Coast Range. I examined the composition and distribution of unmanaged riparian overstories in the central Oregon Coast Range along nine streams which have experienced minimal disturbance...
Coarse woody debris (CWD) decomposition in the Russian boreal forests of the southern taiga zone was studied at four sites located near St. Petersburg in Northwestern Russia, Krasnoyarsk in Eastern Siberia, lrkutsk in the Baikal region, and Khabarovsk in the Russian Far East. This study was part of a broader...
Despite the critical ecological roles of structural features in forests, ecologically
relevant quantitative measures of structure that allow comparisons among forest stands
are still limited. A new index, the structural complexity index (SCI), was developed to
characterize and compare the structural complexity of different forests. Point patterns
of stem-mapped trees...
The purpose of this study was to develop a plant
association classification for the mature coniferous
forests of the McDonald and Paul M. Dunn Research Forests.
A secondary objective was to quantify diversity within the
plant associations. This Forest is approximately 11,000
acres and is located 6 miles to the...
A rapid and efficient procedure that required no partitioning was developed for the purification of abscisic acid (AbA) from the needles of Douglas-fir seedlings. Extracted needle pigments were removed by a
PVP column and the eluted AbA was concentrated on a DEAE column. The AbA was eluted from the DEAE...
Western hemlock-Sitka spruce forests, where prior precommercial thinning has occurred, constitute one of the most productive
young-growth management types along the Pacific Coast from Oregon to southeast Alaska. These stands are ready for a first commercial thinning entry, however, the costs and benefits of such entries and resulting impacts at...
A comparative intraspecific karyotype analysis was performed on European black pine (Pinus nigra Am.) seed sources (countries) by examining root tip meristemic cells of young seedlings (two weeks old). By a combination of Feulgen and Aceto-carmine staining methods, metaphase chromosomes range (12.93 ± 1.33) seedlings from two to three seed...
Noble fir (Abies procera Rehd.) is an upper elevation timber species native to the Cascade Range and (occasionally) the Coast Ranges of Washington and Oregon. It has always been a commerical species; however, recent changes in forest practices to increase harvests in the elevations where this tree occurs has caused...
A sustainable resource development plan framework was prepared for the
Neskonlith Indian Band, who are located in the interior of British Columbia, Canada.
The framework intends to address issues involving; integrated resource management,
traditional native land management, ecosystem management, and community-based
resource management.
A soft systems (Wilson & Morren, 1990)...
An understanding of the gibberellins present in Douglas-fir is essential to understanding and controlling the growth and development
of this species. A technique was developed which permits the separation of certain gibberellins with high performance liquid chromatography and their identification with mass spectrometry. An extraction technique
for the isolation of...