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• <br />TABLE 11-28 <br />Ecological Characteristics of Important Periphyton Species Found <br />at the Seneca II-W Study Area <br /> <br />Location <br />Periphyton Taxa D-1 D-2 D-3 5-1 5-2 S-3 DH* PT** Comments Reference <br />CHLOROPHYTA (Green algae) <br />Scenedesmus quadricauda 5 SA Very pollution tolerant. One of the Patrick and Reimer (1966) <br />most nearly ubiquitous algal species. Roback (1974). <br />BACILLARIOPHYCEAE (Diatoms) <br />F ra gilaria virescens X X X X G29 Widely distributed in fresh water. Prescott (1951) <br />Comphonema Oliva ceum X C14 Widely distributed. Colonizes bare Blum (1956) <br /> rock from November to April. <br />Meridion circulare X NR Widely distributed. Seems to prefer McKee and Wolf (1963) <br /> cold (15°C) flowing water. Epilithic. Prescott (1951) <br />Navicula cryptocephala X X 517 Widely distributed in fresh to Prescott (1951) <br /> slightly brackish water. Epipelic. <br />Navicula ezi ua X G7 Widely distributed in fresh water Prescott (1951) <br /> with ci rcumneutral pH and moderate <br /> hardness. <br />Navicula minima X X G7 Widely distributed in fresh water. Prescott (1951) <br />Navicula tripuncta to X C7 Widely distributed in many kinds of Prescott (1951) <br /> fresh water. <br />Navicula vi ridula X X X X 549 Oligohalobe. Prefers fresh water of Prescott (1951) <br /> circumneutral pH, moderate alkalinity. <br />Navi ucla spp. X X C7 Ubiquitous. Common members of many McKee and Wolf (1963) <br /> periphyton assemblages. <br />Nitzschia ap lea X 52 Second most pollution tolerant Patrick and Reimer (1966) <br />\ species of algae. Widely distributed. <br />