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Biotic interaction and nutrient competition between Chlorella fusca Shih et Krauss and Ankistrodesmus falcatus [Corda] Ralfs

100%

Issa A. A., Abdel-Basset R. M., Adam M. S.

Acta Hydrobiologica

1994

tom 36

nr 3

323-333

In non-limited nutrient experiments (basal medium + 100 µg Ptot. dm-3 and 2000 µg Ntot. dm-3) the highest production (growth rate, chlorophyll ɑ, dry weight) of Chlorella fusca and Ankistrodesmus falcatus grown in pure cultures was obtained. Similar enhancement of mixed cultures (1:1) was observed despite the production of each one being lower than its own in pure culture. C. fusca requires relatively higher amounts of nitrogen than A. falcatus. However, the uptake of phosphorus by C. fusca was lower than A. falcatus. On the other hand, C. fusca can inhibit the growth of A. falcatus, while A. falcatus somewhat improved the growth of C. fusca.

Effect of organic carbon sources on the toxicity of mercury to Chlorococcum infusionum [Schrank.] Menegh. and Ankistrodesmus falcatus [Corda] Ralfs

80%

Mohapatra P. K., Mohanty R. C., Sinha M.

Acta Hydrobiologica

1995

tom 37

nr 1

Abstract - Mercury at all tested concentrations was found to be less toxic to Chlorococcum infusionum than to Ankistrodesmus falcatus. Ankistrodesmus growth was inhibited at all the tested doses of the metal while Chlorococcum remained unaffected up to 0.005µM of Hg2+. A reduction of chlorophyll and protein content, decrease in Chl a/b ratio, and accumulation of glycolate was observed at inhibitory concentrations of Hg2+ whereas amino acid synthesis was not significantly affected. Both the used carbon sources caused a reduction of Hg2+ toxicity to the test algae, glucose being more effective than glutamate.

Ograniczanie wyników

2 Acta Hydrobiologica

1 Abdel-Basset R. M.

1 Adam M. S.

1 Issa A. A.

1 Mohanty R. C.

1 Mohapatra P. K.

1 Sinha M.

1 1995

1 1994

Wyniki wyszukiwania

Biotic interaction and nutrient competition between Chlorella fusca Shih et Krauss and Ankistrodesmus falcatus [Corda] Ralfs

Effect of organic carbon sources on the toxicity of mercury to Chlorococcum infusionum [Schrank.] Menegh. and Ankistrodesmus falcatus [Corda] Ralfs