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Mean Reference Area Species Density —1.15 s = 38.05 — 1.15 (8.14) = 28.69 <br />Mean total species density in the 2011 BRB -5 = 24.37 <br />A classic t -test of the assertion that the 2011 BRB -5 Total Species Density is indistinguishable from 90% <br />of the standard is as follows: <br />t — 28.69 — 24.37 _ 4.38 <br />5.4 <br />(0-0 <br />Critical t (a= 0.1) = 1.311 <br />Hence Alternative Test B is NOT passed. <br />Regarding Alternative Test C, the similarity index between the lifeform species density values for the <br />prescribed lifeforms for 2011 BRB -5 and the Mean Species density (Area- weighted) in the two reference <br />areas is 84.2 percent (Table H -3), exceeding 90 percent of the standard (0.9 x 70% = 63 %). <br />Hence Alternative Test C is passed. <br />Regards Alternative Test D, the total number of native species encountered in the nine 100 sq. m. (2m x <br />50 m) samples of 2011 BRB -5 was 47, greater than the weighted reference area average species density <br />(34.1 species per 100 sq.m.). <br />Hence Alternative Test D is passed. <br />In summary, Mandatory Test A was passed as were Alternative Tests C and D and hence the species <br />diversity test as a whole is passed for 2011 BRB -5 under Phase III criteria. <br />22 <br />