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<br />.- c) <br />C';) . <br />C..) <br /> <br />., <br />. " <br /> <br />CJ <br /><.0 <br /> <br />12 <br /> <br />of this general community has been converted to irrigated cropland. Extensive over- <br />grazing and fire suppression have led to shrub invasion of grassland habitats. The <br />following species are characteristic of the grassland community found in the analysis area <br />for this assessment: western wheatgrass (Aoropyron smithii) ; little bluestem (Andropooon <br />scooarius); prickly poppy (Argemone spp.); asters (Aster spp.); sideoats grama <br />(Souteloua curtipendula), black grama @. eriopoda), blue grama @. gracilis), and hairy <br />grama @. hirsuta); buffalo grass (Suchloe dactyloides); thistles (Cirsium spp.); plains <br />lovegrass (Eraorostis intermedia); Arizona fescue (Fescue arizonical; galleta (!::!. iamesii); <br />one-seed juniper (Juniperus monosoerma); Wright fishook cactus (Mammilaria wrightii); <br />four o'clock (Mirabilis spp.); evening primrose (Oenothera spp.); club cholla (Q. clavata) <br />and tree cholla (Q. imbricata); vine mesquite grass (Panicum obtusum\ mallows <br />(Sphaeralcea spp.); sand dropseed (Sporobolus cryotandrus); needle and thread grass <br />(S!iQg comata); goldeneye Niguiera spp.); and soapweed (Yucca olauca). <br /> <br />The conifer woodland community occupies mesic up/and sites (5000 to 7000 feet) in the <br />San Juan Basin. The grassland community often occurs together with the conifer <br />woodland community. The following species are indicative of the conifer woodland <br />community type: serviceberry (Amelanchier spp.); Fremont mahonia (Berberis fremontii) <br />and red mahonia @. haematocarpal; sego-liIy (Calochortus nuttallii); alderleaf mountain- <br />mahogany (Cercocarous montanus); cliffrose (Cowania spp.); mountain joint-fir (Ephedra <br />viridis); apache plume (Falluaia paradoxa); 9i1ia (Gllig spp.); lupines (Lupin us spp.); <br />muhlies (Muhlenber9ia spp.); mohave prickly pear (Q. erinacea); beardtongue <br />(penstemon spp.); pinyon pine (Pinus edulis), Mexican pine (E. cembroides); antelope <br />brittlebrush (Purshia tridentata); Emory oak (Quercus emoryii), Gambel oak (Q. oambelii); <br />gray oak (Q. orisea), and shrub live oak (Q. turbinella); buckthorn (Rhamnus spp.); <br />buffalo berry (Shepherdia spp.); scarlet globemal/ow (Sohaeralcea coccinea); snowberry <br />(Symohoriocarous spp.); and banana yucca (Yucca baccata). <br /> <br />D. WILDLIFE <br /> <br />Aauatic Resources <br /> <br />Historically, the San Juan River and its tributaries supported a native fish community of <br />at least eight and possibly nine species: cutthroat trout (Oncorhvnchus clarki ssp.), <br />roundtail chub, Colorado squawfish, speckled dace (Rhinichthys osculus), flanne/mouth <br />sucker (Catostomus latioinnis), bluehead sucker (Q. discobolus), razorback sucker, and <br />mottled sculpin (Cottus bairdi). Based on two specimens and skeletal remains in Native <br />American middens, bonytail chub @lill elegans) may also have inhabited the river. <br />Twenty-three non-native fish species have been reported in the San Juan River. In <br />warmwater reaches of the mainstem San Juan River, common carp (Cyprinus caroiol and <br />channel catfish (Ictalurus punctatus) are common and generally distributed. Rainbow <br />trout (Oncorhynchus mvkiss), cutthroat trout (Q. clarki). and brown trout (Salmo trutta) <br />are common non-natives in the coldwater reaches of the San Juan River (including the <br />