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Creator:: Valachovic, Y. S., Caldwell, B. A., Cromack Jr., K., and Griffiths, Robert P.
Abstract:: The effects of initial leaf litter chemistry on first-year decomposition rates were studied for 16 common Pacific Northwest conifers, hardwoods, and shrubs at the H.J. Andrews Experimental Forest in western Oregon. Leaf litters were analyzed for C, N, P, K, Ca, Mg, proximate organic fractions (nonpolar, polar, acid-hydrolyzable extractives, acid-hydrolyzable...
Resource Type:: Article
Full Text:: of Pacific Northwest trees and woody shrubs1 Y.S. Valachovic, B.A. Caldwell, K. Cromack Jr., and R.P

Creator:: Matkins, Joselin
Abstract:: 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...
Resource Type:: Masters Thesis
Full Text:: coniferous forests. Canadian Journal of Botany. 69: 2242-2250. Valachovic, Y.S. 1998. Leaf litter

Creator:: Stringer, Allison L.
Abstract:: Plant litter decomposition plays an important role in the global carbon cycle, and contributes large amounts of carbon to soils, which store more carbon than any other terrestrial pool of organic matter. Decomposition plays a fundamental role in nutrient cycling and alters soil properties that shape plant community composition and...
Resource Type:: Honors College Thesis
Full Text:: an average decomposition rate of 0.26 yr-1 for Douglas-fir (1976), and Valachovic et al. found an

Creator:: Dossa, Ekw'e Lokossou, 1960-
Abstract:: Two native shrub species (Piliostigma reticulatum and Guiera senegalensis) are prominent vegetation components in farmers’ fields in Senegal. However, their role in nutrient cycling and ecosystem function has largely been overlooked. A study including both laboratory and field experiments was conducted to evaluate potential biophysical interactions of the two shrub...
Resource Type:: Dissertation
Full Text:: , samples were hot-water extracted (Valachovic et al., 2004). Total polyphenol was determined in the

Creator:: Kucera, Jennifer Moore
Abstract:: Forest harvest can have significant impacts on forest ecosystems that may influence the capacity of soils to sequester carbon (C). The microbial community controls decomposition, which is a critical process in partitioning litter- and root-C between CO₂ and storage in semi-permanent soil-C pools. The objectives of this study were to...
Resource Type:: Dissertation
Full Text:: concentrations (Hattenschwiler and Vitousek, 2000; Valachovic et al., 2004). At the center of plant material

Creator:: Kiyvyra, Alicia L.
Abstract:: Sustainable management of planted forests requires maintenance of soil function to promote 1) root growth; 2) storage and cycling of water and nutrients; 3) optimal gas exchange; and 4) biological activity. Soil quality measurements can be used to monitor short- and long-term changes in these soil functions, allowing managers to...
Resource Type:: Dissertation

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