By Martina P | 7:49 PM UTC, Mon July 23, 2012 Year 1981 Temperature (°C) 6.3 pH 5.9 Conductivity (μS/cm) 183 Species Mallomonas alata Mallomonas papillosa Mallomonas striata var. serrata Mallomonas pillula f. latimarginalis References DÜRRSCHMIDT (1984)