Phytoplankton of the extremely acidic mining lakes of Lusatia (Germany) with pH ≤3

摘要: Most of the flooded, open-cast lignite mining lakes Lusatia (Germany) impacted by oxidation iron sulphides (pyrite and marcasite) are extremely acidic. Of 32 regularly studied from 1995 to 1998, 14 have a pH <3 (median 2.3–2.9). These typically buffered high concentrations Fe (III) conductivity (1000–5000 μS cm−1). Concentrations dissolved inorganic carbon (DIC) phosphorus low. factors result in very different environment for algae than found neutral acid-rain lakes. The planktonic algal flora is generally dominated flagellates belonging genera Chlorophyta (Chlamydomonas), Heterokontophyta class Chrysophyceae (Ochromonas, Chromulina), Cryptophyta (Cyathomonas) Euglenophyta (Lepocinclis, Euglena mutabilis). Near-spherical non-motile (Nanochlorum sp.), Bacillariophyceae (Eunotia exigua, Nitzschia), Dinophyta (Gymnodinium, Peridinium umbonatum), other (Scourfieldia cordiformis) (Rhodomonas minuta) also found.