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 15 of 15 for “"allometric equations"”.
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Mapping shrub biomass in a boreal continental fen
… (AGB) in peatlands. This thesis summarizes how allometric equations and unmanned aerial vehicles (UAV) can be used to map AGB across a 2-hectare peatland site. Prior to using UAVs to measure AGB, accurate field measurements are required to calibrate and validate the UAV-AGB model. We developed …
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Estimating Aboveground Biomass (AGB) Throughout the Pacific
… has been studied on multiple scales, in which allometric equations were developed to find relationships between AGB and tree parameters. However, despite the presence of AGB studies for specific sites in the Pacific Islands, there is a lack of AGB comparative studies or data syntheses focused on …
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Fruit-based allometry of Strychnos madagascariensis, S. spinosa, and Trichilia emetica in the savanna woodlands of the Umhlabuyalingana municipality, KwaZulu-Natal, South Africa
… of the yields of the fruits. However, allometric equations that enable the quantification of fruit biomass of trees from the wild are non-existent. The present study had four objectives. The first was to develop fruit based allometric equations for Strychnos madagascariensis and S. …
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LINKING ALLOMETRIC SCALING THEORY WITH LIDAR REMOTE SENSING FOR IMPROVED BIOMASS ESTIMATION AND ECOSYSTEM CHARACTERIZATION
… to forest carbon modeling, and examining allometric equations used to estimate biomass stocks in field plots. First, we test controversial theoretical predictions of forest allometry through the mapping of the allometric variability using field plots across the U.S. we find that there is …
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EVALUATING THE PERFORMANCE OF BIOMETRIC APPROACHES FOR VERIFICATION AND MONITORING IN COMMERCIAL FOREST CARBON ACCOUNTING
… from forest inventories and species-specific allometric models. However, stock-centric carbon baselines fail to capture all carbon sources and sinks, and dynamic meteorological conditions drive carbon uptake and forest growth. A combination of high temporal and spatial resolution monitoring of …
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Ecological energetics of Eudyptes penguins at Marion Island
… than basal metabolic rates predicted from allometric equations. Body temperatures of the penguins and the relationships between metabolic rates and temperature were investigated over a range of -10°C to 25°C. Lower critical temperature of Rockhopper Penguins was between 0°C and 5°C, but …
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Characterizing vegetation structure using waveform LiDAR
… characteristics and biomass estimated by allometric equations using tree survey data. Next, we present a method for describing physical canopy clumping structure for individual trees that provides detailed spatial clumping variations. We utilize the K-means clustering algorithm to extract …
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The biology of Sassafras albidum (Nutt.) nees in regenerating upland hardwood stands in southwest Virginia following clear felling
… heteroscedasticity in the data, logarithmic allometric equations were found to be the best fitting models. No significant differences were found between biomass equations from the two site qualities. Leaf area regressions were found to be significantly different. Excavations of the root …
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Simulation of Early Stand Development in Intensively Managed Loblolly Pine Plantations
A system of equations was developed and incorporated into the PTAEDA2 loblolly pine stand simulator to provide growth projections from time of planting. Annual height growth is predicted using a two-parameter Weibull function, where distribution parameters are estimated from equations that utilize …
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The Allometry of Giant Flightless Birds
… are ten times the mass of the largest birds. Allometric equations generated for anseriforms and ratites suggest mid-shaft femur circumference is the best measure to use in estimating avian body mass. The small sample size of extant ratites makes mass estimate extrapolation to larger extinct …
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Estimation of net carbon sequestration potential of citrus under different management systems using the life cycle approach
… using standard carbon inventory methods. Allometric equations were used to transform citrus tree diameter into biomass. Farmers from the ten fields used in this study analysis were asked over input application history to the orchards. Life cycle assessment based carbon foot-printing …
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Estimation of net carbon sequestration potential of citrus under different management systems using the life cycle approach
… using standard carbon inventory methods. Allometric equations were used to transform citrus tree diameter into biomass. Farmers from the ten fields used in this study analysis were asked over input application history to the orchards. Life cycle assessment based carbon foot-printing …
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Assessment of carbon stock and selected soil fertility indicators in a bush encroached savanna at Erichsfelde farm, Namibia
… up along two line transects, while established allometric equations were applied to related measured vegetation variables to estimate carbon stock. Additionally, five 1m x 1m soil pits were nested within the vegetation plots and soil samples collected at different soil depths for analysis. …
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SIMULATED MINE LAND RECLAMATION IMPACT ON BIOMASS PARTITIONING AND NUTRIENT CONTENTS IN LOBLOLLY PINE
… P, K, Ca, Mg) contents for the three treatments. Allometric equations relating dry weights of foliage, stem, branches and roots to diameter at groundline and height were developed to estimate tree biomass. Estimated biomass accumulation improved with FRA treatment which produced a mean of 759 g …