Fig 3. Algal density of Scenedesmus quadricauda and Chlorella vulgaris (control treatment), and the grazing rate of Daphnia magna and Moina micrura on these two algae.

(A) Algal density of S.quadricauda; (B) grazing rate of D. magna on S. quadricauda, and (C) of M. micrura on Scenedesmus; (D) algal density of Chlorella vulgaris; (E) grazing rate of D. magna on C. vulgaris, and (F) of M. micrura on C. vulgaris. Different lowercase letters indicate significant chamber height effect among treatments at a given base diameter. Different upper case letters indicate significant chamber shape effect at a given chamber volume. “*” indicates a significant difference between two treatments at a given chamber height. Data are presented as means ± s.d (n = 6).