By Martina P | 12:26 PM UTC, Mon December 12, 2011 Year 1975 Temperature (°C) 13.0 pH 5.5 Conductivity (μS/cm) 65 Species Chrysosphaerella brevispina Mallomonas heterospina Paraphysomonas vestita Synura echinulata Synura spinosa Mallomonas insignis Chrysosphaerella multispina (= Chrysosphaerella longispina) Spiniferomonas crucigera References KRISTIANSEN (1978)