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<br />OG2J97 <br /> <br />15 <br /> <br />TOTAL MACROINVERTEBRATES <br /> <br /> <br />Figure 4: benthic macro invertebrate ash-free dry standing biomass at Lees Ferry. <br />March 1995 - June 1997 Error bars are :t 1 standard error. Numbers represent invertebrate <br />density/m'. Data courtesy of Shannon et al. (1997), Northern Arizona University. <br /> <br />Final Draft - 12/12/97 - For AMWG Review <br />