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Dissertation/Thesis Abstract

Sample-Plot Size and Diameter Moments/Percentiles Prediction Model Effects on Stand Diameter Distribution Recovery Accuracy
by Bankston, Joshua B., M.S., Mississippi State University, 2019, 50; 13857878
Abstract (Summary)

There have been several studies that aim to determine the most superior Weibull parameter recovery approach of specifying a given forest stand’s Weibull diameter distribution, but no consensus has been made. The lack of agreement could be attributed to studies using different moments/percentile prediction models as well as using different plot size data. This study investigates how plot size and prediction model form affects the performance for moments, hybrid, and percentile Weibull parameter recovery approaches. Five plot sizes and three moments/percentile prediction models were used to determine their effects. Weibull parameters were calculated using each recovery method for each plot size and moments/percentile prediction model combination. Each combination’s diameter distribution was recovered and assessed using absolute error index. Results showed that plot size affected rank of precision for parameter recovery methods. Findings suggest that order statistics may be important in recovering Weibull distribution parameters from stand diameter summary statistics.

Indexing (document details)
Advisor: Poudel, Krishna P.
Commitee: Grado, Stephen C., Sabatia, Charles O.
School: Mississippi State University
Department: Forestry
School Location: United States -- Mississippi
Source: MAI 58/05M(E), Masters Abstracts International
Subjects: Biostatistics
Keywords: Biometrics, Diameter distribution, Growth and yield, Loblolly pine, Parameter recovery, Weibull
Publication Number: 13857878
ISBN: 978-1-392-17288-9
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