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 100 for “"Aboveground Biomass"”.
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Estimating Aboveground Biomass (AGB) Throughout the Pacific
Aboveground biomass (AGB) is a significant carbon pool in forests, making AGB a good indicator of forest health and carbon storage. AGB has been studied on multiple scales, in which allometric equations were developed to find relationships between AGB and tree parameters. However, despite the …
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Remote sensing of dynamics and aboveground biomass of seagrass in Tauranga Harbor (Bay of Plenty), New Zealand
… and estimation of seagrass distribution and biomass. The relatively small and patchy meadows of Zostera muelleri in this harbor can be mapped using a three-category classification (dense, sparse and none) with up to 91% accuracy for dense and 75% for sparse meadows using the machine learning …
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Mathematical Models of <i>Zea mays</i>: Grain Yield and Aboveground Biomass Applied to Ear Flex and within Row Spacing Variability
… the Duncan grain yield model, the Russell aboveground biomass model, and to study the effect of inconsistent spacing within rows on Zea mays L. yield. Plant spacing other than uniform decreases grain yield and profitability. The population experiments conducted at the Warren County location …
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An Object-Oriented Approach to Forest Volume and Aboveground Biomass Modeling using Small-Footprint Lidar Data for Segmentation, Estimation, and Classification
… and coniferous forest volume and above ground biomass estimation, based solely on small-footprint, multiple return lidar data. The study area is located in Appomattox Buckingham State Forest in the Piedmont physiographic province of Virginia, U.S.A, at 78°41’ W, 37°25’ N. Vegetation is composed …
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Effects of Altered Growing Season Precipitation and Management History on Aboveground Biomass Production in Tallgrass and Mixed Grass Prairie of South Dakota
… used to measure resistance in 2014 and 2015 of aboveground biomass in two contrasting plant communities (high productivity/high diversity, low productivity/low diversity) on three ranches (Oacoma, Highmore, and White River) in mixed grass prairie of SD. Tallgrass prairie precipitation …
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Impact of nutrient heterogeneity on plant response and competition in Coastal plain species
… proliferation in rich patches (precision) and aboveground biomass response to heterogeneity were assessed in monocultures, and competitive outcomes (aboveground biomass) were determined from mixed-species plots. In monoculture plots, two species were relatively precise foragers, but no species …
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Species and functional diversity effects on productivity and nutrient uptake: implications for designing sustainable agricultural systems in the Midwest
<p>Temporal data on aboveground biomass and nutrient uptake by species and functionally diverse native perennial plant species and communities is needed to enhance the performance of in-field buffer conservation practices. Comparisons on the performance of monocultures and polycultures of four …
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Productivity and biomass partitioning in 20-year Black cottonwood at variable spacing
… the effects of different spacing treatments on aboveground biomass production, bark, sapwood and heartwood ratios and the branching ratio in 20-year old Black cottonwood (Populus balsamifera L. ssp. trichocarpa (Torr. & A. Gray ex Hook.) Brayshaw) experimental plantation within Sandlækjarmýri …
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Timber Harvesting and Site Preparation Effects on Soil Quality for Loblolly Pine Growing on the Lower Coastal Plain of South Carolina
… into a Soil Quality Index (SQI) and compared to aboveground productivity of 2-yr-old loblolly pine trees growing on closely-spaced (30 by 30 cm) bioassay plots planted across the gradient of soil disturbance. The soil physical properties were used to determine the least limiting water range …
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Examination of Abiotic Drivers and Their Influence on Spartina alterniflora Biomass over a Twenty-eight Year Period Using Landsat 5 TM Satellite Imagery of the Central Georgia Coast
… on inter-annual and phenological patterns of aboveground biomass for Marsh Cordgrass, Spartina alterniflora, on the Central Georgia Coast. The linkages between drivers and plant response via soil edaphic factors are captured in our graphical conceptual model. We used geospatial techniques to …
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Tradeoffs Between Aboveground and Soil Carbon Accumulation Following Forestation
… trees sequester large amounts of carbon in their aboveground biomass. However, there is emerging evidence that under some conditions, soil carbon decreases following forestation, offsetting the carbon accumulated aboveground and rendering carbon sequestration efforts ineffective. The factors …
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Productivity and carbon sequestration potential of seagrass ecosystems in the eastern Aegean Sea
… by relative changes in irradiance and seagrass aboveground biomass. Seagrass biometrics also acted as predictors of carbon sequestration spatially, demonstrating higher productivity in the meadow center compared to the meadow edge. Future forecasts of autochthonous carbon storage must consider …
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A comparison of canopy evapotranspiration for maize and two perennial grasses identified as potential bioenergy crops
… production. The potential widespread use of biomass crops for renewable energy production has sparked numerous environmental concerns, including the impacts of land-use change on the hydrologic cycle. We predicted that total seasonal evapotranspiration (ET) would be higher for PRGs relative …
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Sediment erosion and deposition within mangrove forests
… ecosystems that sequester carbon in their own biomass and by trapping carbon-rich sediment imported from outside the forest and deposited in the forest. Aboveground biomass, like mangrove pneumatophores (i.e., aerial roots), creates conditions that facilitate sediment deposition by enhancing …
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Sediment Erosion and Deposition Within Mangrove Forests
… ecosystems that sequester carbon in their own biomass and by trapping carbon-rich sediment imported from outside the forest and deposited in the forest. Aboveground biomass, like mangrove pneumatophores (i.e., aerial roots), creates conditions that facilitate sediment deposition by enhancing …
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Carbon Pools, Dynamics and Budget of the Bruce Peninsula
… aims to 1) quantify how much carbon is stored in aboveground biomass, soil, roots, litter, and deadwood pools, 2) understand how the carbon moves between these pools and 3) estimate the annual rate of change of the soil carbon budget. Using a LICOR LI8100, measuring soil respiration at 15-minute …
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Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
… GDD parameters could improve the estimation of biomass production of cover crops. Generally, GDD is the summation of daily thermal units [DTU], and DTU can be calculated using several different methods, but all use species-specific cardinal temperatures. There are very basic equations to …
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Impact of mycorrhizal fungi and nematodes on growth of Andropogon gerardii Vit., soil microbial components and soil aggregation
… of C, especially for plant above-and belowground biomass, (2) evaluate the biotic rhizosphere interactions and their role in C cycling, (3) determine the soil microbial community structure as a result of the plant-mycorrhizal symbiosis, and (4) determine the effect of mycorrhizal fungal abundance …
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Vegetative Response to Hurricane Sedimentation
… cm), there were significant increases in live aboveground biomass. Although live belowground biomass did not change significantly over time, the volumetric contribution of both mineral and soil organic matter in the shallow marsh soil increased. These results indicate that hurricane …
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