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REP08531
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REP08531
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Last modified
8/24/2016 11:38:23 PM
Creation date
11/26/2007 11:54:32 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Name
HISTORIC RECORD STUDY AREA VEGETATION AND PRECIPITATION CHARACTERIZATION 1997 WEST ELK MINE SOMERSET
Permit Index Doc Type
REVEG MONITORING REPORT
Media Type
D
Archive
No
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Mathematical evaluation of the relationship between "pre-growing season" precipitation <br />and total vegetation cover and total herbaceous production was undertaken. Using data <br />from the communities of Table 4, both total vegetation cover and total herbaceous <br />production are positively correlated with "pre-growing season" precipitation. While <br />total herbaceous production showed a stronger correlation (r=0.793) than total <br />vegetation cover (r=0.668) to "pre-growing season" precipitation, it should be noted <br />that the correlation coefficient is indicative of the strength of the linear relationship <br />between the correlated factors. Many biologic systems exhibit lineaz relationships only <br />in very limited ranges. With the collection of additional data, it may be determined <br />that the relationships between total vegetation cover, total herbaceous production and <br />"pre-growing season" precipitation may be best described by non-linear equations. <br />To test the strength of the relationships between total vegetation cover, total herbaceous <br />production, and "pre-growing season" precipitation, both lineaz and polynomial <br />(quadratic) equations were developed based on the data from Figure 4. While the <br />equations provided reasonable approximations to the empirical data, none of the <br />equations provided statistically significant regressions. It is postulated that predictive <br />equations may be closely tied to individual vegetation communities, and that the use of <br />three separate and distinct communities may have affected the mathematical <br />relationship. Though the "pre-growing season" precipitation explains a significant <br />proportion of the two parameters, additional factors may have compounding effects on <br />cover and herbaceous production. <br />In future sampling of the historic record vegetation community, the relationship <br />between total vegetation cover, total herbaceous production, and "pre-growing season" <br />precipitation may be further clarified. If the relationships are statistically quantifiable <br />and significant for the historic record vegetation community, quantitative predictive _. <br />values for any growing season may be calculated. These predictive values may lead to <br />significant changes in the manner in which revegetation success is viewed. <br />-12- <br />
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