The effects of allelochemicals... and selected anthropogenic substances on the diatom Bacillaria paxillifera
The effects of allelochemicals... and selected anthropogenic substances on the diatom Bacillaria paxillifera

Summary/Abstract: In aquatic ecosystems, many different substances can degrade the environment and negatively affect the functioning of marine, brackish and freshwater organisms. The main aim of this work was to provide a short summary on the effects of allelochemicals versus herbicide Roundup®, ionic liquid [BMIM]Cl and copper chloride II on the Baltic diatom Bacillaria paxillifera. The influence of allelopathic compounds on the growth was investigated by addition of a cell-free filtrate of the cyanobacterium Nodularia spumigena cultures grown under specific light, temperature and availability of nutrients. Significant changes in diatom abundance were observed in response to all analyzed allelochemicals and anthropogenic substances. A most negative effect of allelochemicals was observed after 7th day of cyanobacterial cell-free filtrate addition. Moreover, this study showed that after addition of copper(II) chloride, the growth of analyzed diatom was 40% lower in comparison to the control. This work showed that the tested allelopathic compounds and anthropogenic substances have negative impact on the analyzed diatom, but allelochemicals showed slightly weaker effect than the herbicide.

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