Size of early life stage <i>A. irradians</i> larvae, grown under two levels of pH and dissolved oxygen.

<p><b>A</b>. Experiment with mixing gases, and B. Experiment manipulating naturally low oxygen and low pH water with aeration and sodium carbonate Bars are means ±S.D. Complete carbonate chemistry from experiments appear in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone.0083648.s001" target="_blank">Tables S1</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone.0083648.s002" target="_blank">S2</a> while statistical analyses appear in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone.0083648.s007" target="_blank">Tables S7</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone.0083648.s010" target="_blank">S10</a>. Shared lower case letters indicate treatments that are not significantly different (p>0.05). Statistical comparisons were among metamorphosed individuals only in panel A, but was between individuals of the same cohort that were metamorphosed individuals in the aerated treatment and larvae in other treatments in panel B as no individuals had metamorphosed in those treatments.