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 16 of 16 for “"canopy coverage"”.
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Genomic and Physiological Approaches to Improve Drought Tolerance in Soybean
… ratio (δ18O, associated with transpiration), canopy temperature (CT), canopy wilting, and canopy coverage (CC) are promising physiological traits associated with improvement of drought tolerance. Genome-wide association studies (GWAS) are one of the genomic approaches to provide a high mapping …
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Relative Invertebrate Availability in Nebraska's Conservation Reserve Management Access Program
… analyzed using visual obstruction reading and canopy coverage estimates. Percent canopy coverage of legumes and total forbs were greater in interseeded than in control fields during both years as was vegetation species richness. Although no differences were detected in percent grass coverage by …
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Distribution and Soil Characteristics Associated with the Neches River Rose-Mallow (Hibiscus dasycalyx)
… with more fertile soils and slightly more canopy coverage than <em>H. laevis</em> and <em>H. moscheutos</em>. <em>H. dasycalyx</em> was also strongly associated with a soil drainage class of moderately well drained to somewhat poorly drained. Soil-site properties associated with the …
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Use of Geographic Information System and Remote Sensing Technologies to Describe Mosquito Population Dynamics in the Ray Roberts Greenbelt, Denton County, Texas
… since last rain event, dew point, and average canopy coverage.
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Stand Strucuture of Planted Stands in Storm-Water Retention Basins
… density, average tree height, and percent canopy coverage) as they relate to leaf area index (LAI) and stand age. Simple linear regressions were used to determine relationships for: structure variables with LAI, structure variables with age, hemispheric canopy photography/LI-COR LAI-2200c …
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Hyperspectral Imagery for Precision Agriculture
… was found that images from the beginning of full canopy coverage to the corn ear formation period provided the best and most stable results for corn yield estimation. The significant image bands were in the red edge region at 700 nm and in the NIR (near infrared) region at 826 nm.
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Natural regeneration and ecological succession in Pinus kesiya watershed plantations in northern Thailand : implications on plantation management
… trees was negatively affected by forest fire and canopy coverage. A high basal area of mature broadleaved trees affected the regeneration process positively. Forest fire disturbance had a strong effect also on plantation structure and species composition. Because of an unclear future forest …
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Physical and Biological Impacts of Gravel Mining on Three Southwest Missouri Streams
… suggest that physical habitat variables such as canopy coverage, substrate quality, and depth have been altered by gravel mining.
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HABITAT USE BY SPRUCE GROUSE IN A FRAGMENTED SYSTEM
… Plains was greatly influenced by patch area and canopy density (<em>Canonical Correlation<sup>2</sup></em>=0.36, df=2, <em>P</em><0.001)</p> <p>I analyzed historical aerial photography of the Yellow Dog Plains in Marquette County, Michigan, from 1937 to 2011 to determine how land cover change …
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The Effects of Prescribed Burning by the National Park Service on Pine -Oak Forests Within Great Smoky Mountains National Park
… factor (GSF), the percentage of total above-the-canopy light reaching the forest floor. A site which received a high intensity burn had canopy coverage substantially reduced resulting in more light penetration compared with a site which received a low intensity prescribed burn and unburned …
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EXTENSIVE GREEN ROOF SUBSTRATE COMPOSITION: EFFECTS OF PHYSICAL PROPERTIES ON MATRIC POTENTIAL, HYDRAULIC CONDUCTIVITY, PLANT GROWTH, AND STORMWATER RETENTION IN THE MID-ATLANTIC.
… increasing organic content increased plant canopy coverage (p<0.05). It is likely that differences in retention will be more defined over time as the system matures. Stormwater retention data represented the second growing season for the experimental platforms; given the effects of organic …
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The effects of invasive European Buckthorn (Rhamnus cathartica) on soil microbial community composition
… based on information about the age, basal area, canopy coverage, and sapling density of buckthorn. I used automated ribosomal intergenic spacer analysis (ARISA) and quantitative PCR (qPCR) to characterize the invaded vs. reference site differences of soil microbial community composition and the …
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Estimating Evapotranspiration of a Riparian Forest Using Sap Flow Measurements
… Pacific Ocean in Santa Cruz County, California. Canopy coverage in the study area often approaches 100% during the growing season, with dominant trees being red alder (<em>Alnus rubra</em> Bong.), arroyo willow (<em>Salix lasiolepis</em> Benth.), and pacific willow (<em>Salix lasiandra</em> …
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Planning the urban forest to enhance urban resilience
… efforts, studies show that urban tree canopy is declining overall (Nowak and Greenfield, 2011). This is partly due to urbanization, but also to the fact that these planting programs have not been as successful as cities would like (Miller and Miller, 1991; Nowak 1990, Jack-Scott 2013, …
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HEALTH OUTCOMES AND OPTIMAL CHOICES IN URBAN AREAS IN RESPONSE TO ENVIRONMENTAL SHOCKS AND CHANGES IN FOREST AMENITIES
… areas. Disruptions to forest amenities and tree canopy coverage caused by shocks to the natural environment may affect urban air quality, behavioral decisions, time use habits, and environmental management. This work exploits two distinct and unrelated shocks to forests in the United States to …
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Savanna Restoration Through Prescribed Fire: Demographic and Physiological Responses of Oak and Hickory Seedlings and Saplings to a Changing Light Environment
… depends upon new individuals entering the canopy. However, little is known about seedling and sapling response to this periodic disturbance. This study identifies how fire affects community structure and composition of dominant savanna seedlings and saplings, and takes the novel approach of …