Laserfiche WebLink
<br />o <br />o <br />('::) 12 <br />", :' <br />.... characteristic of the grassland community found in the analysis area for this assessment: <br />CJ) western wheatgrass (Aaroovron smithii); little bluestem (Androooaon scoparius); prickly poppy <br />(An;lemone spp.); asters (~ spp.); sideoats grama (Bouteloua curtioendula), black grama <br />(~. erioooda), blue grama (~. aracilis), and hairy grama lB. hirsuta); buffalo grass (Buchloe <br />dactvloides); thistles (Cirsium spp.); plains lovegrass (Eraarostis intermedia); Arizona fescue <br />(Fescue arizonica); galleta (H. iamesii); one-seed juniper (Junioerus monosoermal; Wright <br />fishook cactus (Mammilaria wriahtii); four o'clock (Mirabilis spp.); evening primrose (Oenothera <br />spp.); club cholla (Q. clavata) and tree cholla (0. imbricata); vine mesquite grass (Panicum <br />obtusuml mallows (Sohaeralcea spp.); sand dropseed (Soorobolus crvotandrus); needle and <br />thread grass (~comata); goldeneye (Viguiera spp.); and soapweed (Yucca glauca). <br /> <br />The conifer woodland community occupies mesic upland sites (5000 to 7000 feet) in the San <br />Juan Basin. The grassland community often occurs together with the conifer woodland <br />community. The following species are indicative of the conifer woodland community type: <br />serviceberry (Amelanchier spp.); Fremont mahonia (Berberis fremontii) and red mahonia (~. <br />haematocarpa); sego-Iily (Calochortus nuttallii); alderleaf mountain-mahogany (Cercocamus <br />montanus); c1iffrose (Cowania spp.); mountain joint-fir (Eohedra viridis); apache plume (Falluaia <br />oaradoxa); gilia (Gilia spp.); lupines (luoinus spp.); muhlies (Muhlenberaia spp.); mohave <br />prickly pear (Q. erinacea); beardtongue (Penstemon spp.); pinyon pine (~edulisl, Mexican <br />pine (E. cembroides); antelope brittlebrush (Purshia tridentata); Emory oak (Ouercus emorvii), <br />Gambel oak (0. gambelii); gray oak (0. grisea), and shrub live oak (0. turbinella); buckthorn <br />!Rhamnus spp.); buffaloberry (Sheoherdia spp.); scarlet globemallow (Sohaeralcea coccinea); <br />snowberry (Svmohoriocamus 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 at <br />least eight and possibly nine species: cutthroat trout (Oncorhvnchus ~ ssp.), roundtail <br />chub, Colorado squawfish, speckled dace (Rhinichthvs osculus), flannel mouth sucker <br />(Catostomus latioinnis), bluehead sucker (l:;. discobolus), razorback sucker, and mottled sculpin <br />(Cottus bairdi). Based on two specimens and skeletal remains in Native American middens, <br />bony tail chub (.Y.lli! eleaans) may also have inhabited the river. Twenty-three non-native fish <br />species have been reported in the San Juan River. In warmwater reaches of the mainstem San <br />Juan River, common carp (Cvorinus camio) and channel catfish (Ictalurus ounctatus) are <br />common and generally distributed. Rainbow trout (Oncorhvnchus mvkiss), cutthroat trout (0. <br />~), and brown trout (Salmo trutta) are common non-natives in the coldwater reaches of <br />the San Juan River (including the blue ribbon trout fishery in the Navajo Dam tailwater reach <br />and supported by cold water releases from the reservoir) and its upper tributaries. Red shiner <br />(Cvorinella lutrensisl, fathead minnow (Pimeohales oromelas), and mosquitofish (Gambusia <br />affinis) are the most common non-native species found in low-velocity habitats associated with <br />the mainstem San Juan River. <br /> <br />Terrestrial Resources <br />