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<br /> TABLE 3: Continued <br /> Stations <br /> TAXA 1 2 3 <br /> Palpomyia complex 7 23 7 <br />' Parametriocnemus sp. 343 113 200 <br /> Pericoma sp. 17 -- -- <br /> Protm:yderus margarita -- 3 <br /> <br />Simulium sp. 20 =_ <br />30 473 <br /> Thienemanniella sp. 10 9 <br /> Thienemmmimyia sp. group 20 10 80 <br />' Chironomidae pupa 30 40 180 <br /> Coleoptera (beetles) 823 187 673 <br /> Heterlimnius corpulentus 823 180 -- <br />' Oplioservus castanipennis 673 <br /> Zaitzevia parvula -- 7 -- <br /> MOLLUSCA <br /> Gastropoda (snails) <br /> Physa sp. -- -- 13 <br /> OLIGOCHAETA (worms) <br />' Limnodrilus sp. 240 7 7 <br /> TURBELLARIA (flat worms) <br /> Polycelis coronata 113 3 -- <br />' TOTAL 3,347 1,747 5,717 <br /> NUMBER OF TAXA 35 38 25 <br /> SHANNON-WEAVER (H') 3.50 3.74 3.03 <br /> <br /> <br /> and stream sizes on the Williams Fork River in Grand County, Colorado sampled in fall of 1984, <br />' densities ranged from 842 to 1452 organisms/mz with an average of 1,197 organisms/m2. Biomass <br /> at these sites ranged from 3.0 to 5.7 grams/mZ and averaged 3.7 g/mz (Chadwick & Associates <br /> 1986). At four sites on Vasquez Creek and the Fraser R iver, also in Grand County, sampled <br />' during fall 1985 densities ranged from 1,776 to 9,310 organisms/m2 and averaged 4,257 <br /> organisms/m2. Biomass ranged from 3.9 to 25.8 g/mZ and averaged 11.5 g/mZ (Chadwick & <br />' Assoc. 1986). In contrast, samples taken from the North Fork of the South Platte River near <br /> Roberts Tunnel in Park County, an area of stream influenced by past mining activities, had lower <br />' densities and biomass. Samples from fall 1984 at two sites at similar altitudes to Rito Seco <br /> 9 <br /> <br />1 <br />