Index Catalog // ScholarsArchive@OSU

Influences of nitrogen on carbon dynamics in forest soil and density fractions

Creator:: Swanston, Christopher W.
Abstract:: Application of N fertilizer is a common forest management practice in the Pacific Northwest, yet the long-term influence of fertilization on forest soil properties is not well known. Although elevated N often increases mineralization of C and N from labile organic matter, negative effects have been documented in recalcitrant organic...
Resource Type:: Dissertation

Seedling survival, mycorrhiza development and rhizosphere biology of Pseudotsuga menziesii seedlings outplanted on a degraded forest site in southwestern Oregon

Creator:: Colinas, Carlos
Abstract:: Inoculation of planting holes with small amounts of soil from a mature forest and a plantation improved survival and growth of Pseudotsuga menziesii seedlings in a degraded clear-cut in southwestern Oregon. To determine the component(s) of the transferred soil responsible for survival and growth increases, we treated forest, plantation and...
Resource Type:: Dissertation

Decomposition and nitrogen dynamics of red alder and Douglas-fir leaf litter in Oregon Coast Range riparian forests

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:: characterization of the 8 research sites .......... 108 2.2. Litterfall, forest floor, and soil characteristics

Maritime windstorm influence on soil process in a temperate rainforest

Creator:: Kramer, Marc G.
Abstract:: Maritime cyclonic windstorms cause widespread disturbance to forested ecosystems in southeast Alaska. The consequence of this disturbance process on the movement, storage, and quality of soil carbon, forest hydrology and streamwater chemistry was studied along a windthrow disturbance sequence. Soil profiles were described and the thickness of the major organic...
Resource Type:: Dissertation

Carbon fluxes across three climatically-distinct forest chronosequences in Oregon

Creator:: Campbell, John
Abstract:: Biometric and gas exchange techniques were used to measure soil respiration (soil surface CO₂ efflux) and NEP (Net Ecosystem Production) across three climatically-distinct forest chronosequences in Oregon. Results indicate significant forest type, age, and forest type x age interaction effects on annual soil respiration. A regional age class distribution skewed...
Resource Type:: Dissertation

Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon

Creator:: Brainerd, Richard E.
Abstract:: A greenhouse bioassay was used to compare ectomycorrhiza formation and diversity in soils from undisturbed and clearcut and burned areas in moist mesic, moist montane and dry montane forest types representing a gradient of environmental harshness. It was hypothesized that mycorrhiza diversity decreases with increasing environmental harshness and that stability...
Resource Type:: Masters Thesis

Soil carbon and nutrient dynamics of windthrow chronosequences in spruce-hemlock forests of southern Alaska

Creator:: McClellan, Michael H.
Resource Type:: Dissertation

Dynamics of water-soluble carbon in forest soils of contrasting fertility

Creator:: Wagai, Rota
Abstract:: Most soil organic C is in a stable form, associated with clay minerals in the upper soil profile. Upon environmental and land-use changes, stable soil C is subject to losses, which influence the global C cycle and the productivity of terrestrial ecosystems. However, mechanisms controlling soil C destabilization are not...
Resource Type:: Masters Thesis

The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites

Creator:: Volk, John
Abstract:: Miombo woodland and dambo grassland soils were selected to study the effect of soil transfer on early growth of B. petersiana, C. spectabilis, and C. calothyrsus on degraded sites in northern Zambia. The experiment was conducted on previously slash and burned, cultivated, and abandoned sites. Both sterile and unsterile miombo...
Resource Type:: Masters Thesis

Tree species-soils relationships in old-growth forests of the Oregon Coast Range

Creator:: Cross, Alison
Abstract:: Tree species directly and indirectly affect soil nutrient cycles. I sought to characterize soils and foliage associated with four common canopy tree species (Douglas-fir, western hemlock, western redcedar, and bigleaf maple) in mixed-species old-growth forests of the Oregon Coast Range and to determine whether and how soils differ among the...
Resource Type:: Masters Thesis
Full Text:: availability have implications for future forest and stream productivity. Species-specific data on soil

ScholarsArchive@OSU

Influences of nitrogen on carbon dynamics in forest soil and density fractions

Seedling survival, mycorrhiza development and rhizosphere biology of Pseudotsuga menziesii seedlings outplanted on a degraded forest site in southwestern Oregon

Decomposition and nitrogen dynamics of red alder and Douglas-fir leaf litter in Oregon Coast Range riparian forests

Maritime windstorm influence on soil process in a temperate rainforest

Carbon fluxes across three climatically-distinct forest chronosequences in Oregon

Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon

Soil carbon and nutrient dynamics of windthrow chronosequences in spruce-hemlock forests of southern Alaska

Dynamics of water-soluble carbon in forest soils of contrasting fertility

The effect of miombo and dambo soil transfers on early seedling growth of Bauhinia petersiana Bolle., Cassia spectabilis D.C., and Calliandra calothyrsus Meissn. on degraded miombo sites

Tree species-soils relationships in old-growth forests of the Oregon Coast Range

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