Comment on "Phytoplankton Calcification in a High-CO2 World" -- Riebesell et al. 322 (5907): 1466b -- Science
Readers interested in my ocean acidification posts* will recall that there was a big surprise earlier this year when one study suggested that one species of calcifying phytoplankton actually got substantially heavier with more CO2 in the water.
The suggestion was that this may work as an important new CO2 sink, and was quite contrary to previous studies which showed the coccolithophore shells getting smaller with increased ocean acidity.
There was some muttering at the time by other scientists that this study could have been flawed, and now, see the link for a detailed comment by a group of scientists who think they have the problems with the experiment.
The comment is worth reading as setting out the basic issues with acidification and calcification.
Basically, this group still sounds very pessimistic about the "winners" outweighing the "losers" in ocean acidification.
* and who knows if there are any? - no one ever comments on those posts, which just encourages me to continue grinding my teeth about how most of the world is ignoring this issue.
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