Index Catalog // ScholarsArchive@OSU

Structural and physiological changes with stand age : use of a process-based model to compare carbon and water fluxes in young and old-growth Douglas-fir/western hemlock forest stands

Creator:: Licata, Julian A.
Abstract:: Many studies have shown that net primary production in old-growth Douglas-fir/western hemlock forests is lower than in younger forests in similar sites, although the cause is still not clear. One possibility is that overall carbon assimilation, or GPP, is lower in older forests. However, it is difficult to measure GPP...
Resource Type:: Masters Thesis

Spatially explicit inter-temporal forest management decision under the risk of fire

Creator:: Konoshima, Masashi
Abstract:: This paper presents a framework for analyzing efficient spatial allocation of forest management efforts - fuel treatment and harvest - under the risk of fire. The framework integrates a fire behavior model and a spatially-explicit stochastic dynamic optimization model. I investigate the effects of spatial interaction across plots during forest...
Resource Type:: Dissertation
Full Text:: fire simulation model and an optimiza- tion model to examine the optimal forest management strategy

Optimizing the primary forest products supply chain : a multi-objective heuristic approach

Creator:: Hamann, Jeff D.
Abstract:: This thesis is a collection of four submitted manuscripts that present methods to assist forest ecosystem service managers wanting to develop operational sampling, monitoring, and production plans for a set of specific quantifiable ecosystem services, which are formulated as a series of general multi-objective optimization problems. The problems are solved...
Resource Type:: Dissertation
Full Text:: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 3. AN EXAMINATION OF DESIGN-BASED AND MODEL-BASED SAMPLING FOR PRIMARY FOREST PRODUCTS SUPPLY

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:: resolutions and estimation of carbon flux over a managed forest landscape in Western Oregon. Landscape Ecology

Strategies for sampling and estimation of aboveground tree biomass

Creator:: Poudel, Krishna Prasad
Abstract:: The issue of global climate change and an increasing interest in the reduction of fossil fuel carbon dioxide emissions by using forest biomass for energy production has increased the importance of quantifying forest biomass in recent years. The official U.S. forest carbon reporting is based on the forest biomass estimates...
Resource Type:: Dissertation
Full Text:: Eskelson et al. (2011) and to model percent 6 canopy cover in a conifer forest by Korhonen et

Bioenergetics individual based model explorations of juvenile coho salmon growth during their first summer on the Oregon shelf

Creator:: Reser, Brendan Alexander
Abstract:: Salmon survival and eventual recruitment success have long been thought to be determined within the first summer following ocean migration. Juvenile growth during this period is largely influenced by ocean conditions such as temperature, prey availability, abundance, and quality. Shifts in these conditions due to climatic perturbations are particularly prevalent...
Resource Type:: Masters Thesis
Full Text:: Oceanography presented on December 15, 2009. Title: Bioenergetics Individual Based Model Explorations of

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Creator:: Somes, Christopher J.
Abstract:: We present a new nitrogen isotope model incorporated into the three-dimensional ocean component of a global Earth System Climate Model designed for millennial timescale simulations. The model includes prognostic tracers for the stable nitrogen isotopes, ¹⁴N and ¹⁵N, in the nitrate (NO₃ˉ), phytoplankton, zooplankton, and detritus variables of the marine...
Resource Type:: Masters Thesis
Full Text:: presented on June 30, 2009. Title: Nitrogen Isotopes in a Global Ocean Biogeochemical Model

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Creator:: Tepley, Alan J.
Abstract:: Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
Resource Type:: Dissertation
Full Text:: mathematician, he was quick to catch on to concepts and terminology related to fire and forest ecology, and he

Seasonal snowcover dynamics beneath boreal forest canopies

Creator:: Link, Timothy E.
Abstract:: The accurate simulation of snowpack deposition and ablation beneath forested areas is confounded by the fact that the vegetation canopy strongly affects the snow surface energy balance. The canopy alters the radiation balance of the snowcover, and reduces the wind speed at the snow surface. Data collected as part of...
Resource Type:: Masters Thesis
Full Text:: snowpack beneath boreal forest canopies. 4.) Validate the model results using both automatically and

Using a heuristic programming method for incorporating wildlife habitat constraints into spatial harvest scheduling on the Elliott State Forest

Creator:: Lennette, Marie
Abstract:: The Elliott State Forest, located in the Coast Range of Oregon, is currently revising their Habitat Conservation Plan (HCP). Many of the constraints in the HCP are spatial, requiring identification of specific parcels in order to limit activity along habitat reserves, limit harvest opening size, and to coordinate activities within...
Resource Type:: Masters Thesis
Full Text:: harvest units. To model the Elliott, the state forest planning team divided the 93,000 acres into 17

ScholarsArchive@OSU

Structural and physiological changes with stand age : use of a process-based model to compare carbon and water fluxes in young and old-growth Douglas-fir/western hemlock forest stands

Spatially explicit inter-temporal forest management decision under the risk of fire

Optimizing the primary forest products supply chain : a multi-objective heuristic approach

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

Strategies for sampling and estimation of aboveground tree biomass

Bioenergetics individual based model explorations of juvenile coho salmon growth during their first summer on the Oregon shelf

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Seasonal snowcover dynamics beneath boreal forest canopies

Using a heuristic programming method for incorporating wildlife habitat constraints into spatial harvest scheduling on the Elliott State Forest

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