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Wildlife, Animals, and Plants |
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DISTRIBUTION AND OCCURRENCE
GENERAL DISTRIBUTION:Thurber needlegrass occurs in eastern parts of Washington, Oregon, and California; and across northern Nevada to southern Idaho, southwestern Montana, and northeastern Wyoming [17].
ECOSYSTEMS [36]:FRES20 Douglas-fir FRES21 Ponderosa pine FRES29 Sagebrush FRES34 Chaparral-mountain shrub FRES35 Pinyon-juniper FRES36 Mountain grasslands FRES38 Plains grasslands
STATES:
BLM PHYSIOGRAPHIC REGIONS [6]:3 Southern Pacific Border 4 Sierra Mountains 5 Columbia Plateau 6 Upper Basin and Range 8 Northern Rocky Mountains 9 Middle Rocky Mountains 10 Wyoming Basin
KUCHLER [50] PLANT ASSOCIATIONS:K011 Western ponderosa forest K012 Douglas-fir forest K016 Eastern ponderosa Forest K023 Juniper-pinyon woodland K024 Juniper steppe woodland K038 Great Basin sagebrush K050 Fescue-wheatgrass K051 Wheatgrass-bluegrass K055 Sagebrush steppe K063 Foothills prairie K066 Wheatgrass-needlegrass K067 Wheatgrass-bluestem-needlegrass
SAF COVER TYPES [33]:210 Interior Douglas-fir 237 Interior ponderosa pine 238 Western juniper 239 Pinyon-juniper
SRM (RANGELAND) COVER TYPES [74]:101 Bluebunch wheatgrass 102 Idaho fescue 103 Green fescue 105 Antelope bitterbrush-Idaho fescue 107 Western juniper/big sagebrush/bluebunch wheatgrass 210 Bitterbrush 302 Bluebunch wheatgrass-Sandberg bluegrass 305 Idaho fescue-Richardson needlegrass 312 Rough fescue-Idaho fescue 322 Curlleaf mountain-mahogany-bluebunch wheatgrass 402 Mountain big sagebrush 403 Wyoming big sagebrush 405 Black sagebrush 406 Low sagebrush 415 Curlleaf mountain-mahogany 607 Wheatgrass-needlegrass
HABITAT TYPES AND PLANT COMMUNITIES:Thurber needlegrass is an important component of forested, steppe, and shrub-steppe communities of the Pacific Northwest and Great Basin regions [5,35,79,93,104]. Habitats in which Thurber needlegrass is commonly found include sagebrush (Artemisia spp.) deserts [22,25,32,41,81], and open juniper woodlands [30,48,49,54]. This grass is an indicator of climax in a number of sagebrush/grassland, pinyon-juniper (Pinus-Juniperus spp.), and western juniper (J. occidentalis) habitat types. It may dominate the herbaceous layer [41] or exist as a subordinate in communities where the vegetation is dominated by bluebunch wheatgrass (Pseudoroegneria spicata), Idaho fescue (Festuca idahoensis), or needle-and-thread grass (Hesperostipa comata) [20]. In big sagebrush (A. tridentata)/grassland, Thurber needlegrass typically dominates the driest sites (8-10 inches (203-254 mm) precipitation); bluebunch wheatgrass dominates the intermediate sites (11-13 inches (279-330 mm) precipitation); and Idaho fescue dominates the wettest sites (14-16 inches (356-406 mm) precipitation) [96]. Species commonly associated with Thurber needlegrass include big sagebrush in Oregon [45,46,51] and Idaho [28,29,40,47]; low sagebrush (A. arbuscula) in Nevada [40,47]; Sandberg bluegrass (Poa secunda) in Washington [52], southeast Oregon [45,55], and Nevada [28,29]; bluebunch wheatgrass in southeast Oregon [45] and Nevada [28,29]; bottlebrush squirreltail (Elymus elymoides) in southeast Oregon [45]; and cheatgrass (Bromus tectorum) in Nevada [32]. References describing Thurber needlegrass as a community or habitat dominant or codominant include:
Related categories for SPECIES: Achnatherum thurberianum | Thurber Needlegrass |
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