Index Catalog // ScholarsArchive@OSU

Biological soil crusts in forested ecosystems of southern Oregon : presence, abundance and distribution across climate gradients

Creator:: Olarra, Jennifer A.
Abstract:: In arid and semi-arid deserts, soils are commonly covered with biological soil crusts. The study of arid biocrusts and their ecological function has become increasingly common in the literature over the last several decades. Interestingly, no mention is made of biological soil crusts in forested ecosystems, raising the question as...
Resource Type:: Masters Thesis
Full Text:: Biological Soil Crusts in Forested Ecosystems of Southern

Susceptibility of riparian soil invertebrates to the herbicide triclopyr

Creator:: Moran, Patrick (Patrick William)
Abstract:: Riparian zones of Pacific Northwest forests have high species diversity and abundance and act as an important interface between the aquatic and terrestrial ecosystems. In addition, riparian zones comprise a significant portion of the total buffer zone established during commercial forest production to protect aquatic ecosystems from adjacent management activities....
Resource Type:: Masters Thesis
Full Text:: . Riparian Zones 13 2.5 Soil Invertebrate Ecology 16 3. STATEMENT OF PROBLEM 19 4. PROPOSAL 20

Ecuadorean soil arthropod distribution in native vegetation, pasture and cropland and a potato field with and without pesticides

Creator:: Núñez Terán, Verónica
Abstract:: In the past 10 years we have witnessed the beginnings of the study of soil ecology as a unified science, and the general realization by soil scientists, farmers, and land managers that many of the most important economic aspects of soil health are controlled by biological factors. This research focuses...
Resource Type:: Masters Thesis
Full Text:: . Andrew Brower In the past 10 years we have witnessed the beginnings of the study of soil ecology as a

Vegetation and soil response to tree removal methods in invasive western juniper woodlands

Creator:: O'Connor, Casey A.
Abstract:: On piñon-juniper encroached sites that lack the understory fuels to carry a prescribed fire, treatment options are limited to mechanical methods. Cutting with chainsaws and leaving the trees on site has been the primary treatment method for such sites, however this method creates a potential fire hazard, particularly in the...
Resource Type:: Masters Thesis
Full Text:: Rangeland Ecology and Management presented on June 19, 2009 Title: Vegetation and Soil Response to Tree

Soil carbon and nitrogen in old-growth forests in western Oregon and Washington

Creator:: Remillard, Suzanne Marie
Abstract:: Soil organic carbon (SOC, kg C m-2) is an important component in evaluating global C stores. The nitrogen (TN, kg N m"2) cycle is closely linked to C and understanding its role is also important. Contents and distributions of SOC and TN in soil profiles, to 1-meter depth, were estimated...
Resource Type:: Masters Thesis
Full Text:: for the degree of Master of Science in Forest Science presented on April 30, 1999. Title: Soil Carbon

Characteristics of soil organic matter in two forest soils

Creator:: Crow, Susan E.
Abstract:: Soil organic matter (SOM) is the terrestrial biosphere's largest pool of organic carbon (C) and is an integral part of C cycling globally. Soil organic matter composition typically can be traced directly back to the type of detrital inputs; however, the stabilization of SOM results as a combination of chemical...
Resource Type:: Dissertation
Full Text:: : Characteristics of Soil Organic Matter in Two Forest Soils Abstract approved Soil organic matter (SOM) is the

Aggregation, bulk density, compaction, and water intake responses to winter cover cropping in Willamette Valley vegetable production

Creator:: Buller, Gilbert L.
Abstract:: Many agricultural sustainability issues are related to biological processes which are central to the ecological function of soils. Soil physical properties are the architecture in which these processes are carried out. Cover crops hold promise as one of the techniques which can ameliorate poor soil structure and improve bulk density...
Resource Type:: Masters Thesis

Variation in communities of ammonia-oxidizing and denitrifying bacteria in Fennoscandian boreal forest soils

Creator:: Ghimire, Rama D.
Abstract:: The objective of this study was to examine the variation among ammonia-oxidizing and denitrifying communities in soils of a natural Fennoscandian boreal forest and of a forest with a long history of fertilization with different levels of nitrogen (N), and to examine whether there are any changes in the microbial...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Soil Science presented on September 14, 2007. Title: Variation in

The influence of herbivore generated inputs on nutrient cycling and soil processes in a lower montane tropical rain forest of Puerto Rico

Creator:: Fonte, Steven J.
Abstract:: The role of insect herbivores in the nutrient cycling dynamics of forest ecosystems remains poorly understood. Although past research in herbivory has focused primarily on the deleterious effects that insects can have on tree growth and mortality, the overall effects of herbivory are more complex. Herbivores have the potential to...
Resource Type:: Masters Thesis
Full Text:: Herbivore Generated Inputs on Nutrient Cycling and Soil Processes in a Lower Montane Tropical Rain Forest

Serpentine and non-serpentine edaphic ecology and the recovery of Lomatium cookii (Apiaceae), an endangered endemic of southwest Oregon

Creator:: Silvernail, Ian S.
Abstract:: The role of unusual geologies in plant distribution and form is well-known. Serpentine (ultramafic) soils exert a particularly strong influence on plants, as evidenced by a high level of endemism and the morphological and physiological traits displayed in adaptation to the extraordinary chemistry of these substrates. Adaptation may lead to...
Resource Type:: Masters Thesis
Full Text:: March 17, 2008. Title: Serpentine and Non-Serpentine Edaphic Ecology and the Recovery of Lomatium

ScholarsArchive@OSU

Biological soil crusts in forested ecosystems of southern Oregon : presence, abundance and distribution across climate gradients

Susceptibility of riparian soil invertebrates to the herbicide triclopyr

Ecuadorean soil arthropod distribution in native vegetation, pasture and cropland and a potato field with and without pesticides

Vegetation and soil response to tree removal methods in invasive western juniper woodlands

Soil carbon and nitrogen in old-growth forests in western Oregon and Washington

Characteristics of soil organic matter in two forest soils

Aggregation, bulk density, compaction, and water intake responses to winter cover cropping in Willamette Valley vegetable production

Variation in communities of ammonia-oxidizing and denitrifying bacteria in Fennoscandian boreal forest soils

The influence of herbivore generated inputs on nutrient cycling and soil processes in a lower montane tropical rain forest of Puerto Rico

Serpentine and non-serpentine edaphic ecology and the recovery of Lomatium cookii (Apiaceae), an endangered endemic of southwest Oregon

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