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Filtering by: Creator Wells, A. Remove constraint Creator: Wells, A. Decade 2000-2009 Remove constraint Decade: 2000-2009 Degree Field Forest Science Remove constraint Degree Field: Forest Science Rights Statement Copyright Not Evaluated Remove constraint Rights Statement: Copyright Not Evaluated

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  • Spatial and temporal dynamics of anthropogenically influenced forests of the Brazilian Amazon

    Creator:
    Bergen, Scott
    Abstract:
    The Amazon Tropical Rain Forest is the largest tropical rain forest system, comprising approximately 65% of such forests on earth. Since the 1960's, human populations in the Brazilian Amazon have increased from two to over 20 million. Concomitant urbanization, forest conversion, and economic dependence on resource extraction have exerted severe...
    Resource Type:
    Dissertation

  • Western larch resistance to Douglas-fir beetle attack

    Creator:
    Neal, Tiffany A.
    Abstract:
    Live western larch, Larix occidentalis Nutt., a tree species resistant to the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, produces the monoterpene 3-carene in higher concentrations compared to Douglas-fir, the preferred host of D. pseudotsugae (Reed et al. 1986). The inhibitory effects on attraction to aggregation pheromones and toxicity of 3-carene to...
    Resource Type:
    Masters Thesis
    Full Text:
    fungi as well as stop brood development and feeding. This monoterpene may be a factor in the

  • Effects of fertilization, vegetation control, and sulfur on swiss needle cast and growth of coastal Douglas-fir saplings

    Creator:
    Crane, Gabriel A.
    Abstract:
    A series of studies and replicated field sites were implemented in the Oregon Coast Range within Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) sapling plantations infected with varying levels of Swiss needle cast (SNC) caused by the fungus, Phaeocryptopus gaeumannii (Rhode) Petrak (PG). This research was conducted to understand the effects of...
    Resource Type:
    Masters Thesis
    Full Text:
    with and without TacTic® sticker at a rate of 25 lbs/100 gal of water (8 oz sticker/100 gal) as well

  • Ecology of Craterellus tubaeformis in western Oregon

    Creator:
    Trappe, Matthew James
    Abstract:
    Craterellus tubaeformis is a small to medium-sized forest mushroom that is fairly common in the Douglas-fir/western hemlock forests of the Pacific Northwestern United States and is most often associated with decayed coarse woody debris. In this study, the mycorrhizae of Craterellus tubaeformis in western Oregon is identified by DNA analysis...
    Resource Type:
    Masters Thesis
    Full Text:
    grade agarose onto a 8.3 x 10.2 cm glass plate, with wells formed along one edge of the gel by a 24

  • Spatial modeling of carnivore distribution and viability

    Creator:
    Carroll, Carlos
    Abstract:
    Viability analysis of well-selected focal species can complement other types of conservation planning by revealing thresholds in habitat area and landscape connectivity that may not be evident from ecosystem-level evaluations. I used focal species analysis of five carnivores to suggest conservation planning guidelines for the Rocky Mountains and adjacent areas...
    Resource Type:
    Dissertation

  • The role and function of fruit trees and fruit tree-based agroforestry systems in a highland watershed in northern Thailand

    Creator:
    Withrow-Robinson, Bradford A.
    Abstract:
    Field studies were conducted from 1996 to 1998 in three villages in a Highland watershed in Mae Hong Son Province, northern Thailand. The objectives of the study were to classify and define the fruit-based agroforestry cropping system and investigate management activities used by villagers. In the first part of the...
    Resource Type:
    Dissertation

  • 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:
    degree of Master of Science in Forest Science presented on June 14, 2001. Title: Carbon Storage in a

  • Vegetation characteristics expressed through transformed MODIS data : a MODIS tasseled cap

    Creator:
    Lobser, Sarah E.
    Abstract:
    The MODIS NBAR (M0D43B4) data space is explored in terms of biophysical variables with the objective of formulating a MODIS transformation relevant to global vegetation studies. The basic ideas of transform formulation were borrowed from the development of the TM Tasseled Cap transformation, but with differences in sampling strategy and...
    Resource Type:
    Masters Thesis
    Full Text:
    characteristics, there is interest in developing a transformation for MODIS data as well. The launch of the

  • The biology and ecology of Potentilla recta in the Blue Mountains of northeastern Oregon

    Creator:
    Tuitele-Lewis, Jamison
    Abstract:
    Two experiments were conducted on the invasive plant species Potentilla recta in northeastern Oregon to investigate both biological and ecological characteristics of the species. Growth analysis was conducted on the plant at three sites over a period of two years (2002 and 2003). Relative growth rate (RGR) was calculated for...
    Resource Type:
    Masters Thesis
    Full Text:
    characteristics of the species. Growth analysis was conducted on the plant at three sites over a period of two

  • Physiological impacts of Swiss needle cast on Douglas-fir

    Creator:
    Manter, Daniel K.
    Abstract:
    A series of studies, in three western Oregon Douglas-fir plantations, was conducted to understand the physiological impacts of Swiss needle cast on Douglas-fir physiology. Four aspects of the disease complex were investigated: fungal colonization and assessment, plant-water relations, carbon assimilation and interaction with climate. Several techniques were developed and used...
    Resource Type:
    Dissertation