Extreme differences in akinete, heterocyte and cylindrospermopsin concentrations with depth in a successive bloom involving Aphanizomenon ovalisporum (Forti) and Cylindrospermopsis raciborskii (Woloszynska) Seenaya and Subba Raju

▶ Significant correlations with CYN, EC, nutrients and Fe in hypolimnmetic water. ▶ Peak CYN concentration at depth unrelated to cell abundance. ▶ Extreme differences in specialized cells with depth. ▶ Dominance of Cylindrospermopsis raciborskii in a subtropical lake.