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Table 3. Densities of benthic invertebrates (#/m2) from the Green river, river backwater habitat type, at the Ouray National <br />Wildlife Refuge, Ouray, Utah. <br />July 10. 1991 August 8. 1991) <br /># of samples # of samples <br />Taxon Density/m2 (95% C.L.) processed Density/m2 (95% C.L.) processed <br />Nematoda 54,872 (24,350-123,650) <br />Oligochaeta 26,642 (14,622-48,495) <br />5 134,183 (94,656-190,542) <br />9 164,731 (101,881-266,728) <br />5 <br />5 <br />Insecta <br />Ceratopogonidae 96(90-107) <br />Chironomidae 31,125 (15,356-63,089) <br />Early instars 8,877 <br />Chironomus 7,032 <br />Lenziella 346 <br />Polypedilum 14,179 <br />Procladius 461 <br />Psectrocladius 115 <br />Tanytarsus 115 <br />30 461 (385-552) <br />5 22,863 (12,139-43,136) <br />7,301 <br />6,340 <br />1,249 <br />5,860 <br />1,345 <br />0 <br />769 <br />30 <br />6