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TABLE 2.7-14 <br />• Mean Density (Numbers/m2), Biomass (G/m2} and Species <br /> Diversity of the Major Invertebrates Groups <br /> Collected from Stations on Oak Creek <br /> (August, October 1979; Jonuory, June, 1980} <br /> Density (Numbers/m2) Biomass (Grams/m2) <br /> TAXA Station I Station 2 Station I Station 2 <br /> <br /> NEMATODA 7 4 + + <br /> HIRUDINEA I I + 0.1 <br /> OLIGOCHAETA 2090 38 0.8 C%.2 <br /> MOLLUSCA <br /> Gastropods 34 51 1.2 1.6 <br /> Pelecypoda 126 37 0,2 0.1 <br /> CRUSTACEA <br /> Amphipoda 13 ---- 0,1 ---- <br /> HYDRACARINA 59 33 + + <br /> INSECTA <br /> Ephemeroptera 5708 1442 6.0 2.2 <br /> Plecoptera 13 112 + 0.8 <br /> Trichoptero 3149 4008 8,8 14.9 <br /> Diptera 16756 3368 27,4 6.1 <br /> Coleoptera 1815 956 2,7 I.8 <br /> Hemipiera •~--- I ---- + <br /> <br /> TOTAL 29771 10051 47,2 27.8 <br /> <br /> NUMBER OF TAXA 40 49 <br /> SPECIES <br /> DIVERSITY - D 2.87 3.24 <br /> + .Present but less than 0. f g/m2 <br />• <br />2.7-51 <br />