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TABLE 2.7-13 <br />• Mean Density (Numbers/m2), Biomass (Grams/m2) and <br />Species Diversity of the Major Benthic Invertebrate <br />Groups Collected from Stations on Trout Creek <br />(August, October, 1979 and January, June 1980) <br /> <br /> <br />TAXA Density (Numbers/m2) <br />Stations <br />I 3 Biomass (Grams/m2) <br />Stations <br />I 2 3 <br /> <br />4 <br />NEMATODA I ---- 2 4 + ---- + + <br />TURBELLARIA ---- I ---- ---- ---- + ---- ---- <br />OLIGOCHAETA 6 6 56 28 + + 0.2 0.1 <br />MOLLUSCA <br />Gostropoda 71 43 130 129 0.4 0.7 0.8 4.7 <br />Pelecypoda 3 7 2 4 + + + + <br />HYDRACARINA 35 2 3 2 + + + <br />• INSECTA <br />Ephemeroptera 545 871 937 1292 2.2 2.1 1.6 1.9 <br />Plecoptera 278 101 101 105 2.1 2.9 2.7 1.5 <br />Trichoptera 2175 3188 4276 4640 3.6 18.4 17.8 33.2 <br />Diptera 991 881 728 2599 4.8 3.4 1.9 10.0 <br />Coleptera 563 352 842 625 I.0 0.4 I.0 0.9 <br />Hemiptera ---- ---- ---- I ---- ---- ---- + <br />TOTAL 1668 5452 7077 9429 14.1 27.9 26.0 52.3 <br />NUMBER OF <br />TAXA 49 47 S I 57 <br />SPECIES _ <br />DIVERSITY * D 3.84 3.40 3.65 3.22 <br />+ =Present but less than 0.1 g/m2 <br />* Shannon-Weaver function <br />• <br />2.7-48 <br />