Effect of different light conditions on cyanobacteria and algal communities in Tatra Mts stream (Pland)

• Authors: B. Kawecka
• Languages of publication: EN

Abstracts

EN

Different light conditions at the open and shaded sites caused by marginal vegetation affected the structure of Cyanobacteria and algae communities, but had no effect on chlorophyll a content. In the open area Hydrurus foetidus (Villars) Trevisan, Homoeothrix janthina (Bornet et Flahault) Starmach, and diatoms (mainly Achnanthes minutissima Kutz. together with A. biasolettiana Grun. and species from the Gomphonema genus ) were the most numerous. In shadow the abundance of Hydrurus foetidus drastically decreased, whereas the diatom biomass index, Achnanthes minutissima and A. biasolettiana showed a tendency to reduce their number. On the contrary, the abundance of green algae and Cocconeis placentula Ehr. var. euglypta Ehr. increased. Chlorophyll a contents of both sites obtaining the highest values in summer - autumn and the lowest in the winter - spring seasons.

Keywords

EN

ALGAE; CHLOROPHYLL A; CYANOBACTERIA; ECOLOGY; LIGHT; STREAM; TATRA MTS

Discipline

• AQUATIC_SCIENCES: AQUATIC SCIENCES

• Publisher: Institute of Oceanography, University of Gdansk
• Journal: Oceanological and Hydrobiological Studies
• Year: 2003
• Issue: 2
• Pages: 3-14

Contributors

author

B. Kawecka

• Document Type: ARTICLE
• Publication order reference: B.Kawecka, Karol Starmach Institute of Freshwater Biology, Polish Academy of Sciences, Slawkowska 17, 31-016 Krakow, Poland