2019-09-10_REVISION - C1994082 - Laserfiche WebLink

Home Browse Search

Thus, Mandatory Test A is passed based on assessment of 2016 cover data. With regard to Alternative Test B, Total Species Density test, the standard is the point at which the central 75 percent of the distribution of overall species density in the Reference Areas begins. Mathematically this would be the Mean Reference Areas species density(9 of species per 100 sq. m.) — 1.15s where s is the standard deviation. The following is calculated for the 2018 BRB-2 Phase III and Phase II+ III release area(see Table J-6 in Attachment D): Mean Species density(un-weighted,without noxious species) in the four reference areas = 26.38 species per 100 sq.m. Probability-adjusted density standard.- Mean Reference Area Species Density— 1.15s = 26.38— 1.15 (5.04) =20.59 Mean total species density in the 2016 BRB-1 =25.94 Since the reclaimed area value (25.94) was greater than the standard (20.59), Alternative Test B is passed for 2016 data. Regarding Alternative Test C,this test uses the Motyka similarity index to assess the resemblance of the distribution of species density by life form of the reclamation vegetation compared to that of the Reference Areas. The Motyka index formula used is: 2c + b) As used in Test C, the index assessed similarity between the lifeform species density values for the prescribed lifeforms for the 2016 BRB-2 Phase III and Phase II+III release area and the Mean Species density(area-weighted)in the four reference areas(text and Table J-7 Attachment D).The resulting Motyka similarity index value is 74%,exceeding 90%of the standard(0.9 x 70%=63%). Hence Alternative Test C is passed for 2016 data. Alternative Test D is conducted as a direct test of the presence of native species in the reclaimed area as reflected in the cumulative presence of reclaimed area native species within the usual first ten to twenty 2m x 50m plots associated with the species density determination that accompanies SL-7 - 25