The Extent of Bias Caused by Substituting Points in Forest Survey: a Simulation Study PDF Download
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Author: Michael S. Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Author: Michael S. Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Author: Michael S. Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Author: Michael S Williams
Publisher: Forgotten Books
ISBN: 9780656595150
Category :
Languages : en
Pages : 22
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Excerpt from The Extent of Bias Caused by Substituting Points in Forest Survey: A Simulation Study Figure 4. Example of rotation about regularly numbered points. Population edge effect was important when sample points were substituted with points inside the population because the probabilities of selec tion for trees near the boundary change. However, the original probabilities of selection were used because the calculation of true probabilities of selection required additional measurements and was dependent on the location of point 1. Edge effect between adjacent subpopulations was less important because there can be offsetting estima tion errors. For example, if points are moved out from a pine plantation at one location, it is possible that other points will be moved into a similar pine plantation at another location. Thus, it is difficult to determine situations where edge effect between adjacent population can cause a bias. However, rotation increases the variance of the parameter estimates because between-cluster variance is increased. Some disturbances at the stand boundary that cause population edge effect are: Kudzu (pueraria lobata infestation, wind damage, reduced resource competition, increased light penetration, and differences in snow deposition. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author:
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Category :
Languages : en
Pages : 7
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Author:
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ISBN:
Category : Forests and forestry
Languages : en
Pages : 144
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Author: Gregory S. Bevenger
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 280
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Author:
Publisher:
ISBN:
Category : Forest health
Languages : en
Pages : 96
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The Forest Inventory and Analysis (FIA) Program of the U.S. Department of Agriculture, Forest Service is in the process of moving from a system of quasi-independent, regional, periodic inventories to an enhanced program featuring greater national consistency, a complete and annual sample of each State, new reporting requirements, and integration with the ground sampling component of the Forest Health Monitoring Program. This documentation presents an overview of the conceptual design, describes the sampling frame and plot configuration, presents the estimators that form the basis of FIA's National Information Management System (NIMS), and shows how annual data are combined for analysis. It also references a number of Web-based supplementary documents that provide greater detail about some of the more obscure aspects of the sampling and estimation system, as well as examples of calculations for most of the common estimators produced by FIA.
Author: Robert C. Musselman
Publisher:
ISBN:
Category : Forest surveys
Languages : en
Pages : 70
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 764
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 288
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