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-20- Revised OCT 3 0 !S8i <br />endangered plant species of Colorado. None of these plant species proposed <br />for threatena33 and endangered status was encountered on the study area. <br />A "vulnerable" plant species list for Colorado was obtained frcxn the <br />Plant Information Netcnrk (PIN), Colorado State University (CSU), Ft. Collins, <br />Nlorado. Plants liste3 as vulnerable are species that local ta~wrrnd,sts <br />think should be monitored for possible decrease in range or number. None <br />of the 33 "vulnerable" plant species of ~lorado was enornmtered on the <br />study area. <br />T~ DE27SI7Y AND HASAL AREA <br />' Tree density and basal area estimates are provided for species within the" <br />juniper and riparian cam¢mrities on the study area in Table 9. Density <br />figures are to be interpreted as number of trees per unit area of ttre <br />vegetation type (i.e., riparian) rnther than over all types. 7i~ juniper <br />ccmmmity, comprised of Utah jwuper (JUniperus osteospernia) contains more <br />gees per acre than the riparian type. the riparian tree oammmity, Ixxever, <br />is more diverse mntainirrg three species of trees, narrowleaf cottDlII Wd <br />( lus angustifolia), plains cottarn~ood (~. sarger!tii) aid Chinese <br />elm (Ulnas parvifolial. 'L4ie species containing the largest trees as~deter- <br />mined by basal area is the plains cottorrcvod (basal azea = 900.51 onz)~follow~l <br />by Utah juniper 1737.10 cmz), nazmwleaf cottotn cod (290.77 amz) and CJtinese <br />elm (214.26 cant) . <br />CpJER, FREQUENCY, PRODUCfIVI7Y, SHRUB DF.9SITY AND HIICSIT <br />Cover data are presented by species, life form aryl quadrat for grassland <br />and upland sagebrush vegetation types on affected and control areas in <br />Appendix B, Part 1. Basal cover is presented for all species while ~pP1' <br />cover is also determined for shrub species. Percent Dover estimates for <br />. bare grand and litter-rock deriver] frvn basal cover estimates (i.e., <br />percent grourrl rover remainirw after total vegetation cover is determined <br />is appropriated to bare grand and/or littermck). Shnrb height data are <br />~~ presented for all shrubs enco!mtered in corer quadzats. Density estimates <br />are derives] from shrub data collected in shrub density transacts. A cover, <br />shrub height and shrub density summary table for all quadrats or transacts <br />• (Revised March 2006) Attachment2.05.6(2r1-25 <br />