Performance of <i>A. irradians</i> larvae exposed to two levels of dissolved oxygen and pH_T.

<p>(A) Percent survival and (B) percent metamorphosis of surviving <i>A. irradians</i> larvae during exposure to two levels of pH and dissolved oxygen. (C) Percent survival and (D) percent metamorphosis of surviving <i>A. irradians</i> larvae in water naturally low in dissolved oxygen and pH (umamended), low oxygen with normal low pH (via the addition of sodium carbonate), or with normal oxygen and pH (via aeration with and without sodium carbonate). There was no metamorphosis in the unamended and sodium carbonate treatments. Points are means ±1 S.D. Dissolved oxygen and pH levels are presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone-0083648-g002" target="_blank">Figures 2</a>. Complete carbonate chemistry is given 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.s005" target="_blank">Tables S5</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone.0083648.s006" target="_blank">S6</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083648#pone.0083648.s008" target="_blank">S8</a>, and S9.