Search Results

1 results returned.
To copy the URL of a document, Right Click on the document title, select "Copy Shortcut/Copy Link", then paste as needed. Only documents available to the public have this feature enabled.
Title Sort descending Sort ascending Primary
Author Sort ascending Sort descending
Date Sort ascending Sort descending
Abstract / Details
View
Hard
copy
An Analysis of a Site Index ? Biogeoclimatic Ecosystem Classification (SIBEC) Analysis Nigh, Gord
2019
A
D
Abstract: The Site Index  Biogeoclimatic Ecosystem Classification (SIBEC) model allows site index, which is a measure of site productivity, to be estimated from Biogeoclimatic Ecosystem Classification site series and species. SIBEC site index estimates and their standard errors are published online; however, a simplistic approach to calculating these standard errors was taken. New growth intercept models were developed from stem analysis data and were applied to SIBEC data collected in the Coastal Western Hemlock biogeoclimatic zone, very dry maritime subzone, 01 site series (CWHxm2/01) for Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii). A more appropriate approach to calculating the standard error of the mean site index estimate was derived and applied to the SIBEC data. The formula for the standard error requires knowledge of the covariances between growth intercept model predictions, which are unknown except when only one model is used to make the predictions. The results indicated that the corrected standard errors were substantially lower than the standard errors calculated using the current method. A typical SIBEC site index estimate is made up of data from growth intercept models, site index models, and stem analysis. Combining these data sources greatly complicates the standard error calculations, which makes their computation even more difficult than when only growth intercept models are used to estimate site index.
 
Nigh, Gord. 2019. An Analysis of a Site Index  Biogeoclimatic Ecosystem Classification (SIBEC) Analysis. Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Research Report (FLNRORD). TR127
 
Topic: FLNRORD Research Program
Keywords: covariance, growth, intercept, model, site, index, model, standard, error, mean, stem, analysis, variance
ISSN:  Scientific Name: 
ISBN:  English Name: 
Other Identifier: 
 
To copy the URL of a document, Right Click on the document title, select "Copy Shortcut/Copy Link", then paste as needed. Only documents available to the public have this feature enabled.

EIRS Search Options

Useful Contacts