Asymbiotic N fixation in leaf litter in the Northwest was assayed by acetylene reduction. Annual N input measured by periodic sampling in a young Willamette Valley Douglas-fir plantation at Adair, Oregon was 1.08 +_.13 kg/ha. Using different calculating methods, six other annual
estimates at the Adair site ranged from 0...
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...
The rate and manner of bioniass loss from decomposing Douglas-fir and western hemlock boles in mid-elevation forests of the central Cascade Range were measured. Bole bark and wood were considered separately. Loss of bole wood due to respiration was measured by change in bole wood density. Loss of bole wood...
The effects of initial leaf litter chemistry of 16 common coniferous and deciduous hardwoods and shrubs on their annual decomposition patterns were studied on the H.J. Andrews Experimental Forest (Oregon). Leaf litters were characterized by their chemical qualities, which included measurement of elemental fractions (C, N, P, K, Ca, Mg),...
I examined factors regulating decomposition rates of red alder (Alnus rubra)) and Douglas-fir (Pseudotsuga menziesii) leaf litter in Coast Range riparian areas in western Oregon. Overall, this study was designed to examine the influence that leaf litter quality characteristics and decomposition site treatment have on decomposition rates, to provide a...
Basidiomycete fructifications collected at the research site were Cortina sp., Amanita sp., Armillaria sp., Polyporus abietinus,
Fomes annosus, Poria spp., Fomes pinicola, Coprinus spp., and Cantharellus cibarius.
Fungal organisms isolated from partially decomposed needles were phycomycetes and Fungi Imperfecti, and organisms isolated from
undecomposed needles were primarily yeasts ... The...
A litter decomposition model was developed as part of :a watershed modeling effort. This model simulates weekly dry weight changes In woody and nonwoody litter (01), incorporated litter layer (02), and soil organic matter. Processes simulated by the model include: litterfall by component, root turnover, respiration, decomposition, and organic matter...