E. Hornstrom et al., THE INFLUENCE OF PH ON ALUMINUM TOXICITY IN THE PHYTOPLANKTON SPECIESMONORAPHIDIUM-DYBOWSKII AND MONORAPHIDIUM-GRIFFITHII, Water, air and soil pollution, 85(2), 1995, pp. 817-822
The toxicity of aluminum on the phytoplankton species Monoraphidium gr
iffithii and M.dybowskii (Chlorophyceae) was investigated. At pH 6.8 a
nd low humus concentration, the growth of both species was reduced at
100-200 mu g Al/l, whereas at pH 4.8 only the growth of M. griffithii
was affected. The toxicity on the two species showed different relatio
ns to the ps-value. The results, supported by analyses of Al-fractions
- total acid soluble, total monomeric and none-labile monomeric Al -
indicate that the Al-toxicity is species-dependent, and that aluminium
, soluble at neutral pH-conditions, can be toxic to the phytoplankton.