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b) Species Diversity <br />i) The first couple paragraphs in this section on page 11 contain a couple references that <br />are apparently retained from a Wyoming proposal, and should be withdrawn from the final <br />draft proposal (e.g. references to "Chapter 1" and "Appendix A"). <br />ii) The proposal includes 3 separate species density based tests. Diversity success would be <br />demonstrated if success is demonstrated for 2 of the 3 tests. Alternative Test C (Presence of <br />Native Species) includes three sub-alternatives. We agreed at the meeting that only one of <br />these sub-alternatives (Alternative iii) would be retained in the final draft, for inclusion in <br />the technical revision application. <br />9. Shrub Evaluation <br />a) Presumably, the mapping of the various shrub density category areas will be conducted within <br />each of the three bond release blocks, but this is not stated and should be clarified. <br />b) It is not clear whether sampling at the intensity described will be applied within each of the <br />bond release blocks, or whether the sampling intensity will be reduced in BRB-1, as described for <br />cover and production sampling. This should be clarified. <br />c) Our understanding of how the shrub density evaluation would be applied within BRB3 is <br />described below. It will probably be the same within BRB-2, with the exception that hypothesis <br />testing would not necessarily be employed to demonstrate success, but this will need to be <br />clarified. <br />As we understand the proposal, within an individual BRB, a type of stratified random woody plant <br />density sampling will be conducted, with proportional allocation within each stratum based on size <br />of individual shrub patches (larger patches will have a correspondingly larger number of <br />transects than smaller patches). The defined strata will be the mapped shrub density category <br />areas (high density, medium density, low density, and non shrub patch areas). Within each <br />mapped stratum, a minimum of twenty belt transects will be run. The transects will be randomly <br />located within each of the multiple patches that comprise a density category area (in the "no <br />patch area", the transects would be presumably be randomly distributed throughout the stratum). <br />Presumably, sample adequacy based on the formula given on page 15 would be achieved within <br />each mapped stratum. Depending on "within stratum" variance of the mapped density category <br />areas, a relatively large sample size might be required within each of the four strata, under this <br />approach. Consideration of alternative sampling approaches that might allow for a smaller <br />sample size may be warranted. An example of a possible alternative approach is described in <br />the following paragraph. <br />The high density category area could be sampled as one stratum, and the remaining density <br />category areas lumped into a single, separate stratum for sampling purposes. Under this <br />approach, it would make sense to specify two separate standards, one for the high density <br />category (e.g. 1000 stems per acre) and one for the remainder of the BRB (e.g. 100 stems per <br />acre). In this scenario, any of the various sample adequacy and testing approaches applicable to <br />woody plant density evaluation in proposed Rules 4.15.11(2) and 4.15.11(3) could be applied <br />separately to each of the two strata, as applicable, depending on the data. <br />Please consider amending the plan to allow for the "two strata" approach, or other sample <br />design and testing approaches that may be more efficient. <br />d) In the narrative on page 14 and the top of page 15, the term "patch" seems to be used to <br />described an individual shrub stand that can be observed, categorized as to relative density, and <br />mapped accordingly, Multiple individual mapped patches (stands) that fall within the same <br />relative density category, would constitute an individual category area (for example, "high density <br />