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A. Water Quality <br />Indicator 1. Algal GNOivtlt. <br />Starting at the beginning of the 200m in-stream transect, walls in the channel about O.Sm from <br />the water's edge and, using the ocular tube, every 2 meters record the presence or absence of <br />filamentous algae. Do not count the single cell algae that may cover the surface of rocks. <br />Calculate the total percent cover of filamentous algae by dividing number of positive lots by <br />100. See examples in Photo 1 and 2. <br />Photo 2: Algal Gro« th <br />(Indicator 1). A large <br />rock about 3 inches <br />below the water surface <br />in Calf Creek. Utah. <br />Much of the surface of <br />the rock is covered by <br />single-celled algae. This <br />t~~pe of algal growth is <br />typical in many undis- <br />turbed streams in the <br />American Southwest <br />and should not be count- <br />ed while measuring <br />Indicator 1. If the entire <br />transect appears as <br />shown in this photo. it <br />would receive a score of <br />~. Photo by Peter <br />Stacey. <br />Photo 1: Algal Gro~i th <br />(Indicator 1). Strands of <br />filamentous algae in a <br />reach of the Santa Fe <br />River below Santa Fe. <br />New Melico. The <br />eltensive growth of <br />algae in this reach is due <br />to nutrient loading from <br />upstream sources of pol- <br />lution. If the entire tran- <br />sect resembles this <br />photo, it would receive <br />a score of 1. Photo by <br />Peter Stacey. <br />15 <br />