Effect of Postmining Waters on Cyanobacterial Photosynthesis

0454523 - MBÚ 2016 RIV US eng J - Journal Article
Medová, Hana - Přikryl, I. - Zapomělová, Eliška - Pechar, L.
Effect of Postmining Waters on Cyanobacterial Photosynthesis.
Water Environment Research. Roč. 87, č. 2 (2015), s. 180-190. ISSN 1061-4303. E-ISSN 1554-7531
R&D Projects: GA MZe QH82078
Institutional support: RVO:61388971 ; RVO:60077344
Keywords : acidic waters * postmining area * Dolichospermum sp
Subject RIV: EE - Microbiology, Virology
Impact factor: 0.659, year: 2015

New waterbodies have been created in a postmining area of the brown-coal basin in Sokolov, Czech Republic. The former opencast quarry, Medard, has been filling with water from a local river, the surrounding catchment spoil heaps, and acid mine drainages. The effect of acidic (pH down to 2.5) and high-conductivity water (up to 1400 mS/m) on selected cyanobacteria and the possibility of cyanobacterial water bloom in the newly formed Lake Medard were studied by means of chlorophyll fluorometry (actual photosystem II [PSII] quantum yield, Delta F/F-m', and relative electron transport rate, rETR). The acidic spoil-heap waters caused a decrease in cyanobacterial photosynthetic activity of 52 to 100% of the initial Delta F/F-m' value. The Dolichospermum strains were about 10 times more sensitive than Microcystis viridis. The high concentration of dissolved ions appeared to have less effect on cyanobacterial PSII. Although the bottom meta- and hypolimnion layers were proven to negatively influence the cyanobacteria, the perennial stratification of the lake does not enable the water characteristics of the upper layers to change extensively and thus possibly suppresses the undesirable cyanobacterial bloom. The response of cyanobacteria to spoil-heap waters appears to be species-specific and can promote selection of those resistant to postmining environments.
Permanent Link: http://hdl.handle.net/11104/0255188