Index Catalog // ScholarsArchive@OSU

A chronosequence of wood decomposition in the boreal forests of Russia

Creator:: Yatskov, Mikhail A.
Abstract:: 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...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: -"'""-----'"--'--""--=-'~L....-'~=----~--==------------ Mark E. Harmon Coarse woody

Associations of forest floor vertebrates with coarse woody debris in managed forests, western Oregon Cascades

Creator:: Butts, Sally R.
Abstract:: Forest floor vertebrate species presence and abundance may be influenced by the volume and cover of coarse woody debris (CWD) in managed forests. I studied macro- and microhabitat associations of vertebrate species in 18 closed-canopy stands ranging in CWD volume from 14 to 859 m3/ha. Pitfall traps were used to...
Resource Type:: Masters Thesis

Carbon storage in a Pacific Northwest conifer forest ecosystem : a chronosequence approach

Creator:: Janisch, Jack E.
Abstract:: As concern over global warming intensifies, sequestration and storage of atmospheric CO2 has become an important scientific and policy issue. Confusion persists, however, over interpretation of forest carbon (C) source-sink dynamics, in part because conclusions drawn depend on temporal and spatial scales of analysis (e.g. day-week scale vs. successional-scale), type...
Resource Type:: Masters Thesis
Full Text:: . I Abstract Approved: ---.ao..-----r:v-----w~--,,....------,-( -.-,--- Mark E. Harmon As

Early forest succession following clearcuts in western Oregon : patterns and abiotic controls

Creator:: Yang, Zhiqiang
Abstract:: Historical aerial photos were used to examine the early phase of forest succession after stand replacement disturbance, covering the Coast Ranges Province (CRP) and the western Cascades Province (WCP) of western Oregon. The study consisted of two components: characterizing the pattern of forest succession in western Oregon; analyzing the influence...
Resource Type:: Dissertation

Environmental variability and system heterogeneity in terrestrial biogeochemical models

Creator:: Sierra, Carlos Alberto
Abstract:: Ecosystems are highly heterogeneous systems subjected to important levels of environmental variability; however, it is common in terrestrial biogeochemical models to assume homogeneous properties of the elements of the system or constant environmental conditions. For some processes, heterogeneity in these models is treated very simplistically, but there is not much...
Resource Type:: Dissertation
Full Text:: Variability and System Heterogeneity in Terrestrial Biogeochemical Models Abstract approved: Mark E. Harmon

Functional relationships among songbirds, arthropods, and understory vegetation in Douglas-fir forests, western Oregon

Creator:: Hagar, Joan C.
Abstract:: Arthropods are important food resources for birds. Forest management activities can influence shrub-dwelling arthropods by affecting the structure and composition of understory shrub communities. Changes in abundance and species composition of arthropod communities in turn may influence the distribution and abundance of insectivorous birds. I examined relationships among bird abundance,...
Resource Type:: Dissertation

Fungal diversity within decomposing woody conifer roots in Oregon

Creator:: Vandegrift, V. Eleanor
Abstract:: Previous studies have indicated that roots from five tree species (Picea sitchensis, Tsuga heterophylla, Pseudotsuga menziesii, Pinus ponderosa, and Pinus contorta) decompose at different rates across an environmental gradient in Oregon. Measurements of wood chemistry from each tree species as well as moisture and temperature from each location do not...
Resource Type:: Masters Thesis
Full Text:: -'! .... ~-,:::rc._~'""';_e_d_a_c_t_e.:;_9_t_o-+.r-o ..... /_i~=--'-c;v_,_· . ___ /_· -- Mark E. Harmon n

Inter-annual variability of net primary productivity across multiple spatial scales in the western Oregon Cascades : methods of estimation and examination of spatial coherence

Creator:: Woolley, Travis J.
Abstract:: Quantifying and modeling processes involved in the global carbon cycle is important to evaluate the temporal and spatial variability of these processes and understand the effect of this variability on future response to changing climate and land use patterns. Biomass accumulation and Net Primary Productivity (NPP) are large components of...
Resource Type:: Masters Thesis
Full Text:: privacy ACKNOWLEDGEMENTS I would like to first thank Mark E. Harmon and Kari E. O'Connell for giving

Live-tree carbon in the Pacific Northwest : estimates and uncertainties

Creator:: Melson, Susanna L.
Abstract:: Concentration of carbon dioxide (CO₂) in the atmosphere has increased over the past 150 years. Because CO₂ is one of a number of radiatively active gases, there is concern that global temperatures will rise and climatic conditions will change. Recent research indicates northern hemisphere forests may currently be accumulating carbon...
Resource Type:: Masters Thesis

Modeling nitrogen fixation in dead wood

Creator:: Hicks, William Thomas
Abstract:: A mechanistic simulation model of nitrogen fixation in dead wood was developed to help synthesize knowledge, develop hypotheses, and estimate rates of nitrogen fixation in the Pacific Northwest. In this model nitrogen fixation is directly controlled by log substrate, temperature, moisture, and oxygen content. Respiration and diffusion of oxygen indirectly...
Resource Type:: Dissertation

ScholarsArchive@OSU

A chronosequence of wood decomposition in the boreal forests of Russia

Associations of forest floor vertebrates with coarse woody debris in managed forests, western Oregon Cascades

Carbon storage in a Pacific Northwest conifer forest ecosystem : a chronosequence approach

Early forest succession following clearcuts in western Oregon : patterns and abiotic controls

Environmental variability and system heterogeneity in terrestrial biogeochemical models

Functional relationships among songbirds, arthropods, and understory vegetation in Douglas-fir forests, western Oregon

Fungal diversity within decomposing woody conifer roots in Oregon

Inter-annual variability of net primary productivity across multiple spatial scales in the western Oregon Cascades : methods of estimation and examination of spatial coherence

Live-tree carbon in the Pacific Northwest : estimates and uncertainties

Modeling nitrogen fixation in dead wood

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