RT Journal Article SR Electronic A1 HAŠLER, A1 & POULÍČKOVÁ, P. A1 A., T1 Competition for light among summer planktonic species JF Czech Phycology YR 2003 VO 3 IS 1 SP 153 OP 159 UL https://fottea.czechphycology.cz/artkey/fot-200301-0014.php AB The presented study aims to verify the hypothesis that Planktothrix agardhii, similarly to diatoms, can tolerate low light conditions; thus the changes in species composition of cyanobacterial blooms can be explained by light limitation. Its ability to occupy dominant position in the mixture with other planktonic species under low light conditions has been verified by experiments.