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  • Title: Comment on "Calcareous nannoplankton response to surface-water acidification around Oceanic Anoxic Event 1a".
    Author: Gibbs SJ, Robinson SA, Bown PR, Jones TD, Henderiks J.
    Journal: Science; 2011 Apr 08; 332(6026):175; author reply 175. PubMed ID: 21474738.
    Abstract:
    Erba et al. (Reports, 23 July 2010, p. 428) attributed calcareous nannofossil morphology and assemblage changes across Cretaceous Oceanic Anoxic Event 1a to the effects of surface ocean acidification. We argue that the quality of carbonate preservation in these sequences, the unsupported assumptions of the biotic response to acidity, and the absence of independent proxy estimates for ocean pH or atmospheric pCO(2) render this conclusion questionable.
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