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<br />DRY CREEK <br /> <br />Station 1 - June 16. 1992 <br /> <br />The community was dominated by organic enrichment tolerant taxa. There were indications of some <br />sedimentation at this station. Organic enrichment tolerant simuliids numbered 1110S/square meter. High <br />numbers of simuliids are often found where the watershed has experienced high organic nutrient loading, <br />which is often associated with overgrazing impacts. Cleanwater taxa included just one cleanwater mayfly, <br />Epeorus, which was present in less than resident population numbers. <br /> <br />With a stream gradient of 1.9, this stream reach should have good maintenance capability. The DA T <br />at this station was 3.4, which indicates poor diversity. <br /> <br />Compared to early summer data from 1991 at Station 1, conditions in 1992 were somewhat better, <br />as indicated by all of the analysis elements; see analysis data table. <br /> <br />The potential for a fishery at this station appeared to be fair. The macro invertebrate biomass of 1.3 <br />g/m' could provide nutrients for a fairly good fishery. However, the scarcity of c1eanwater species <br />indicated limited spawning substrate in this stream reach. <br /> <br />The BCl of 80 indicated that this stream reach was in good condition but could be better. It <br />appeared that there may be opportunities for management to improve water quality, riparian habitat <br />quality, and instream habitat quality in this aquatic ecosystem. <br /> <br />Station I - Au~st 13. 1992 <br /> <br />There were indications of some sedimentation at this station. Sediment tolerant indicator taxa present <br />per square meter were Tricoryrhodes minurus (405), Bezzia (75), and Oligochaeta Tubificidae (S3). <br />Tricorythodes had a strong resident population. This mayfly competes best where there is a sandy <br />substrate. Cleanwater taxa included just one stonefly with extremely low numbers. <br /> <br />The observed number of shredders in the community is generally found where the riparian habitat <br />is in poor condition or where instream habitat conditions are not suitable for these species. With a stream <br />gradient of 1.9, this stream reach should have good maintenance capability. The DA T at this station was <br />11.2, which indicates fairly good diversity. <br /> <br />25 <br /> <br />.11 ij 2- <br />