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

<p>(A) Algal density of <i>S</i>.<i>quadricauda</i>; (B) grazing rate of <i>D</i>. <i>magna</i> on <i>S</i>. <i>quadricauda</i>, and (C) of <i>M</i>. <i>micrura</i> on <i>Scenedesmus</i>; (D) algal density of <i>Chlorella vulgaris</i>; (E) grazing rate of <i>D</i>. <i>magna</i> on <i>C</i>. <i>vulgaris</i>, and (F) of <i>M</i>. <i>micrura</i> on <i>C</i>. <i>vulgaris</i>. 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).