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. 2014 Feb 5;9(2):e87678. doi: 10.1371/journal.pone.0087678

Figure 2. Calcification response of Porolithon onkodes to ocean acidification treatments.

Figure 2

Mean (±SE) rates of net calcification for P. onkodes collected from upstream and downstream habitats after 14 days of exposure to three pCO2 treatments. The asterisk denotes a significant difference of an a priori comparison between upstream and downstream origins under the variable pCO2 treatment.