Index Catalog // Hyrax

Management effects on nitrogen nutrition and long-term productivity of western hemlock stands : an exercise in simulation with FORCYTE

Creatore:: Sachs, Donald
Abstract:: Regression equations applicable to biomass components of standsof western hemlock [Tsuga heterophylla (Raf.) Sarg.} were developedby destructive sampling of a thinned and an unthinned stand ofwestern hemlock near Seaside, Oregon. Equations predicted more live-branchbiomass and less dead-branch biomass per tree for the thinnedstand, but equations for biomass of foliage, twigs,...
Resource Type:: Masters Thesis

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

Creatore:: 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

Evaluation of factors associated with reforestation problems on severe sites in the Dead Indian area of southwestern Oregon

Creatore:: Williamson, Denis M.
Abstract:: Reforestation of certain areas of southwestern Oregon has become a serious problem. Reforestation failures are evident in numerous clear-cut stands, but failures are also noted in various partially-cut stands. The Dead Indian Plateau, approximately twenty miles east of Ashland, Oregon, has many areas where this is evident. This study investigated...
Resource Type:: Masters Thesis

The long term effects of burning on plant succession

Creatore:: Kraemer, James Fred
Abstract:: The succession of plants over a period of 25 years was analyzed on clearcut areas in the western Cascades of Washington and Oregon. Thirty-three paired burned and unburned plots were reexamined in 1975. Data were combined with records from prior examinations by Morris (1970). Cover trends of six major brush...
Resource Type:: Masters Thesis

Correlation of riparian vegetation and stream attributes

Creatore:: Miller, Rachel Ann, 1968-
Abstract:: Riparian plant assemblages give clues of the conditions of the soil and other physical characteristics of their stream-side environment. The plight of the spring/summer, and fall Snake River chinook salmon has aroused interest in fish habitat and the effects of riparian plants on fish habitat. This study was launched to...
Resource Type:: Masters Thesis

Maturation of noble fir (Abies procera) and grand fir (Abies grandis) seed

Creatore:: Snyder, Jeffrey L.
Abstract:: The objectives of this investigation were two-fold: (1) to examine possible seed and cone characteristics and their usefulness as seed maturity indices, and (2) to examine the effects of artificial ripening on seed maturation and germination. Cone fresh weight, cone length, cone specific gravity, cone color, seed fresh weight, seed...
Resource Type:: Masters Thesis

Thinning response in Alnus rubra and Arbutus menziesii : effects of spacing, light, and moisture

Creatore:: Kim, Sang-kyun
Abstract:: In western Oregon, hardwood trees occupy 20% of the timberland but account for less than 1% of the timber harvest. Information about how to manage them effectively is limited. The objective of this study was to examine: 1) effect of thinning on tree growth, plant moisture stress, and crown cover...
Resource Type:: Masters Thesis

Spatial analysis of Phellinus weirii infection centers in the central Cascades of Oregon : inferring ecological processes from patterns

Creatore:: Lattin, Peter D.
Abstract:: This study was conducted to investigate why root disease centers east of the Cascade crest tend to be larger in diameter and more abundant than their counterparts to the west, within subalpine forest stands of central Oregon. The trend in a 290 km² study area appeared opposite of what was...
Resource Type:: Masters Thesis

Evaluating methods for measuring soil-CO₂-efflux in artificial, controlled and natural ecosystems

Creatore:: Nay, Stephan Mark
Resource Type:: Masters Thesis

Conifer phytotoxicity and vegetation control efficacy of ten selected herbicides

Creatore:: Coate, Jeremy E.
Abstract:: Ten herbicides (atrazine, azafenidin, chlorsulfuron, clopyralid, hexazinone, imazapic, imazapyr, metsulfuron, pendimethalin, and sulfometuron) were evaluated for phytotoxicity in first-year seedlings of eight conifer species (Douglas-fir, grand fir, noble fir, redwood, Sitka spruce, western hemlock, western red cedar, and western white pine). Six of these herbicides (atrazine, clopyralid, hexazinone, imazapyr, metsulfuron,...
Resource Type:: Masters Thesis

Hyrax

Management effects on nitrogen nutrition and long-term productivity of western hemlock stands : an exercise in simulation with FORCYTE

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

Evaluation of factors associated with reforestation problems on severe sites in the Dead Indian area of southwestern Oregon

The long term effects of burning on plant succession

Correlation of riparian vegetation and stream attributes

Maturation of noble fir (Abies procera) and grand fir (Abies grandis) seed

Thinning response in Alnus rubra and Arbutus menziesii : effects of spacing, light, and moisture

Spatial analysis of Phellinus weirii infection centers in the central Cascades of Oregon : inferring ecological processes from patterns

Evaluating methods for measuring soil-CO₂-efflux in artificial, controlled and natural ecosystems

Conifer phytotoxicity and vegetation control efficacy of ten selected herbicides

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