Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 57 for “"Other Environmental Sciences"”.
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Investigation of small mammal species richness, abundance, and genetic population structure on and around the Eastern Washington University Prairie Restoration Site
<p>Small mammals are an ecologically important component of every landscape on Earth. They are a food source for higher trophic level animals, disperse plant seed and mycorrhizal fungi spore, engineer the landscape through burrowing and foraging activities, and alter plant community composition …
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Riparian resilience in the face of interacting disturbances: understanding complex interactions between wildfire, erosion, and beaver (Castor canadensis) in grazed dryland riparian systems of low order streams in North Central Washington State, USA
… degraded state, unable to store water or provide other once inherent ecosystem functions. Beaver restoration has been gaining traction as a way to address long term riparian degradation, yet little has been documented regarding the impact of restored beaver activity on recently burned riparian …
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Tall Fescue (Lolium arundinaceum (Schreb.) S.J. Darbyshire) Cultivar Performance in the Central California Coastal Region
… that utilizes lower levels of inputs than most other cool season turfgrasses (Turgeon, 2005). In recent years, turf breeders have been selecting for cultivars of tall fescue that have finer leaf textures. As the use of tall fescue expands, consumers want to now what cultivar to use and how to …
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Evaluation of Groundwater Sodium and Sodium Uptake in Taxodium and its Hybrids on Galveston Island, Texas
… preventing the unaided return of live oaks and other species to the island. To determine effective ways to ameliorate the elevated Na<sup>+</sup> concentrations in the soil, eight treatments were applied to the soil and combinations of three species of plants, live oak (<em>Quercus …
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ESTIMATION OF QUANTITATIVE GENETIC PARAMETERS OF THE EASTERN OYSTER (CRASSOSTREA VIRGINICA) IN THE GULF OF MEXICO
<p>The decline of natural oyster reefs in Gulf of Mexico (Gulf) states has stimulated the development of aquaculture to support the industry and restoration programs. Gulf habitats feature diverse salinity environments that may require oysters bred for habitat-specific optimal genetic …
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SIMULATED MINE LAND RECLAMATION IMPACT ON BIOMASS PARTITIONING AND NUTRIENT CONTENTS IN LOBLOLLY PINE
<p>Forest productivity on reclaimed mine land is hindered by soil compaction. Different techniques have been used to alleviate the effect of compaction to various degrees of success. The Forestry Reclamation Approach (FRA) was developed in the Appalachians and has been used to improve forest …
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Remediation Strategies for Mercury Contaminated Lakes and Reservoirs Within the State of California
<p>Mercury is an environmental and public health concern due to its neurodegenerative effects and ubiquitous concentration within the environment. To mitigate these risks and reduce concentrations within the environment, remediation methods are necessary. The purpose of this paper is to investigate …
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A System Dynamics Model of Soil Carbon Stock and Flows in Grasslands Under Climate and Grazing Scenarios.
… changes at the landscape level. While there are other biogeochemical models in existence, they are either meant to model large areas, including globally, or are meant to be at a farm level and have limited plot sizes, limiting the options for rangeland managers to test management strategies in …
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What Role Can CEQA Play in Reaching GHG Emissions Reductions Goals Set Forth in AB 32 – An Analysis of CEQA, AB 32, and Recommendations for CEQA Reform
… emissions to 1990 levels by 2020. The California Environmental Quality Act (CEQA) is an environmental assessment law adopted in 1970 that requires lead agencies (private developers, public agencies, etc.) to consider and disclose the potential significant environmental impacts of new development …
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Effects of Excessive Soil Phosphorus Accumulation on Loblolly Pine (Pinus taeda L.) Seedlings
<p>Many landowners in East Texas apply poultry litter to pastures as a source of nitrogen (N) for forage crops. After many years of repeated poultry litter application, soils can accumulate extremely high extractable phosphorus (P) concentrations, sometimes over 1000 mg kg<sup>-1 </sup>of plant …
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Host Plant Resistance in Strawberries to Anthracnose and Colonization of Crown and Root Tissue by Verticillium dahliae and Macrophomina phaseolina
<p>Strawberries are considered an important crop in California where in 2018 it was in the top 5 valued fruit and vegetable commodities valued at $2.84 billion accounting for 88% of the total U.S. production. Strawberry production can be severely impacted by soilborne pathogens that can affect …
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An Assessment of the Potential for Urban Rooftop Agriculture in West Oakland, California
<p>Throughout the world, all forms of urban agriculture are growing in popularity with the desire to grow and eat locally sourced food. Barriers such as access to vacant land and contaminated soil make it difficult to implement urban agriculture projects on the ground (i.e. at grade). Rooftop …
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Assessment and Characterization of Microbial Communities in Salt Affected Soils on Galveston Island
<p>After Hurricane Ike in 2008, Galveston Island was flooded with sea water that left the soil and groundwater of the island with elevated sodium concentrations. As part of a long-term study that aims to restore plant life to the island, various soil amelioration techniques are being evaluated. …
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Comparison of gold extraction yields by cyanide treatment vs. bioleaching procedure
… treated with the bacteria was 15% and the other two columns trreated with cyanide had 25% of Au from the effluents. These findings indicates that the use of <em>A.faecalis</em> as an encouraging option for Au leaching of mine tailings which requires little supervision that translates in …
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Soil Amelioration and Plant Establishment on Sodium Affected Soils on Galveston Island, Texas
<p>The storm surge from Hurricane Ike in 2008 inundated much of Galveston Island, Texas, causing lasting below-ground impacts in the form of elevated soil sodium (Na+) concentrations. The Na+ initially killed much of the vegetation on the Island and its persistence in soils and groundwater slowed …
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An Analysis of Juvenile Chinook Salmon Outmigration Speed and Survival in Response to Habitat Features: Sacramento River from Knights Landing to Sacramento, California
<p>Outmigration is an important life stage for Chinook salmon (<em>Oncorhynchus tshawytscha</em>) survival in the Sacramento River, and yet our understanding of their behavior and needs during this time is limited. To gain a better understanding of their survival and movement rates during …
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Comparing Newly Built Wetlands in the Atchafalaya Bay, Louisiana and Sacramento-San Joaquin Delta, California
<p>This research investigated patterns in elevation change in newly built wetlands in the Atchafalaya delta, and newly restored wetlands in the Sacramento-San Joaquin River delta. RSETs were used to measure small changes in elevation, and soil cores were processed to examine mineral and organic …
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A Comparison of Four Wetlands Assessment Procedures Relevant to the Alluvial Valleys of East Texas
<p>Currently several methods are used by public and private entities to assess wetland functional condition in support of the Section 404 Clean Water Act program. Four of these are: <em>Forested Wetlands in Alluvial Valleys of the Coastal Plain of the Southeastern United States</em> (SEHGM); <em>A …
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Phytoremediation of Metal Contamination Using Salix (Willows)
… Acid Mine Drainage (AMD) are a source of vast, environmental degradation that are toxic threats to plants, animals, and humans. Cadmium (Cd) and lead (Pb) are metal contaminants often found in AMD. In my mine outwash water samples, cadmium and lead concentrations were 19 and 160 times greater …
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