Comment on "Calcareous Nannoplankton Response to Surface-Water Acidification Around Oceanic Anoxic Event 1a"

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...

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Bibliographic Details
Main Authors: Gibbs, SJ, Robinson, SA, Bown, PR, Dunkley Jones, T, Henderiks, J
Format: Article in Journal/Newspaper
Language:unknown
Published: AMER ASSOC ADVANCEMENT SCIENCE 2011
Subjects:
MARINE CALCIFIERS
CALCITE
Ocean acidification
Online Access:http://discovery.ucl.ac.uk/1304697/
Description
Summary: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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