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where <br />c = the smaller of the paired species density values (for each lifefonn) of the reclaimed <br />and reference areas' <br />a =total of species density values for lifefonns of the recaimed areas <br />b =total of species density values for the lifeforms of the reference area' <br />* 'Weighted average lifefonn species density using the Seneca II Reference Areas (weighted <br />based on 83% original extent of Mountain Brush /Aspen and 17°h original extent of Sagebrush). <br />Only species density by vascular plants will be included. Lifeforms to be used will inGude: <br />AnnuaUbiennialforbs <br />Perennial forts <br />season grasses <br />Shrubs <br />Perennial cool <br />Alternative Test D): Assessment of the Presence of Native Species <br />The third alternative assessment of the species diversity of reclaimed lands makes direct <br />reference to the presence of native western North American plant species in reclaimed areas. <br />Total cumulative # of native species" _> avg. reference area native species density <br />(# species / 100 sq.m.) <br />"in the adequate sample of the reclaimed area and including alfalfa and / or titer <br />milkvetch which have often been included in seed mixes asnitrogen -fixers in light of the lack of <br />suitable and available native nitrogen-fixers. <br />Shrub Evaluation <br />Lands in the Seneca II Mine 2005-2006 bond release testing in Bond Release Blocks BRB-1 and <br />BRB-2 were all disturbed prior to September 23, 1981. Hence no performance standard for the <br />presence of woody plants is applicable. <br />The location of shrub patches in each of the three BRB sample areas were documented by field <br />mapping (possibly preceded by mapping from stem aerial photography) during Spring and <br />Summer 2005. During the mapping, "High° density was reserved for those areas apparently <br />(visually) greater than or equal to 1000 shrubs per ac (one quarter shrub per sq.m.; 25 shrubs per <br />100 sq.m.). All other portions of the BRB was labeled as "background" density. <br />11 <br />