Impacts of climate change on phytoplankton species are very focusing issues nowadays. This research explored the probable impacts different pH (pH 5.90 to 9.10) and salinity (0.60 3.0 ppt) concentrations freshwater Chlorella vulgaris, Euglena granulata Scenedesmus quadricauda. The initial community composition was 4:2:1 for three taxa, which changed 6:3:1, 6:2:1, 6:3.5:1 9:4:1 in 5.90, 9.10 2.2...

The interactive effect of metal ions namely chromium and iron has been studied under controlled conditions on the diazotropic cyanobacterium Hapalosiphon stuhlmannii and the photosynthetic green alga Scenedesmus quadricauda over the exponential growth period of the cells. The work describes by employing an exponential cell growth model, the effect of metal ions both individually and in combinat...

We tested, in the laboratory, the influence of light intensity, temperature, and phosphorus (P) supply on fatty acid (FA) concentrations of four freshwater algae: the green algae Scenedesmus quadricauda (Turpin) Bréb. and Chlamydomonas globosa J. Snow, the cryptophyte Cryptomonas ovata Ehrenb., and the diatom Cyclotella meneghiniana Kütz. We investigated the main and interactive effects of two ...

Algae green, blue–green, and diatom grown in inorganic media produced particulate and dissolved organic carbon DOC . DOC produced by a green-alga contains 25% hydrophobic acids. DOC from all algae had specific ultraviolet absorbance values less than 2.0 m−1 mg/L −1. Algae-produced DOC was biologically labile; greater than 60% degraded in bioreactors within 5 days. The biodegradable material lik...

Algae are known to produce extracellular organic substances under optimum conditions and increase their production under stress. The changes in amount and composition of extra­ cellular carbohydrates and proteins of three green algae Scenedesmus quadricauda, Chlorella kessleri and Raphidocelis subcapitata (known as Selenastrum capricornutum) were studied after a 5-days’ cultivation under the in...

The understanding of environmentally induced changes in the biochemical composition of phytoplankton species is of great importance in both physiological studies and ecological food web research. In extensive laboratory experiments we tested the influence of two different temperatures (I QOC and 25°C) and a phosphorus supply gradient on the sterol concentrations of the three freshwater phytopla...