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• Comparing the cumulative number of species in what would ofren be twenty 100 sq.m. samples to <br />the average density in reference areas really compazes a native speaes density p« 2000 sq.m. in the <br />developing revegetated areas to the native speaes density per 100 sq.m. in the long established native <br />azeas. As such it allows for a forwazd-looking assessment of the developing presence of native <br />species without necessitating the passage of the likely requisite several to many decades for them to <br />"fill-in" and actually achieve a density per random 100 sq.m. equal to that occuring in the <br />undisturbed areas. <br />SHRUB EVALUATION <br />Iondr in the Seneca 77 Mine 2005-2006 bond ukase testing in Bond Aekase Blacks BBB-1 and BIB-2 mere all <br />disturbed prior to September 23, 1981. <br />The location of shrub patches in each of the three BRB sample areas was documented by field <br />mapping (preceded by mapping from stereo aerial photography) during Spring and Summer 2005. <br />During the mapping, "I3igh" density was reserved for those areas apparendy (visually) greater than or <br />equal to 1000 shrubs per ac (one quarter shrub per sq.m.; 25 shrubs per 100 sq.m.). All other <br />portions of the BRB were considered as "background" density. Ffahibit 13-13.3, Shrub <br />Concentration Areas, shows the locations of the areas sale«ed. <br />In BRB-1 and B1tB-2, the mapping of High shrub density at~eas will NOT be followed up with <br />separate quantitative sampling. Shrub density data associated with the covet sampling transacts will <br />be collected, but no sampling centered on the High Density patches will be pursued in these azeas. <br />• Such cover samples as happened to have fallen in High Shrub Density patches of B1ZB-1 and BRB-2 <br />will be noted for descriptive purposes. <br />In BRB-3, quantitative density dab fiom mapped shrub patch areas was gathered from belt transacts <br />located and oriented randomly within the individual shrub patches. Fifty (50) samples were located <br />in the "High" density patches. The number of samples per patch was proportionally based on the <br />size of the patch In the Background shrub density portions of B1tB-3, appmzitnately twenty (20) <br />additional- sample points (beyond the thirty (30) sampled in conjunction with cover and/or <br />production) were located and sampled for shrub density. The origin of the transact was placed in the <br />center of the patch, unless tb do so prevented the belt ttansed sample area from staying within the <br />patch boundaries. If more than one sample point was located in a patch, they were evenly <br />(uniformly) spaced in the polygon. The belt transacts (Le. elongate sample plots) were 2 m z 50 m in <br />dimension and randomly oriented firm dte origin. Within each belt transact, all living trees and full <br />shrubs whose root «owns emerge within the plot boundaries w«e counted by speaes. Sample <br />adequary of collected shrub density data from the B1tB-3 shrub patch sampling will be determined as <br />follows: <br />(st)z <br />n,,,„, _ ----------- <br />(~)z <br />Where: <br />n„m, =the number of sample points needed in a given vegetation type to be capable of <br />detecting a 15% reduction in the mean with 90% confidence; <br />• s = sbndazd deviation (n-1); <br />ESCO Associates 13-13-10 Tf~40 * 03/06 <br />