[Coral-List] Increasing alkalinity on a reef increases calcification

Douglas Fenner douglasfennertassi at gmail.com
Fri Feb 26 16:20:51 EST 2016

More popular press on the article:

How do you save a sick coral reef?  Pop an antacid.


Ocean acidification slowing coral reef growth, study confirms.


Cheers,  Doug

On Fri, Feb 26, 2016 at 6:32 AM, Dennis Hubbard <dennis.hubbard at oberlin.edu>

> Hi Peter:
> I didn't have a chance to look at the paper in detail, but the crux of the
> presentation was that community-level calcification went up significantly
> when the pH was changed (by adding NaOH and not taking away CO2). SO, while
> this is something (we think) we knew, I thought this was a great way to go
> back in time, keeping everything the same axcept ocean chemistry.
> I had a nice but short chat with the presenter after what I thought was a
> superb talk asking why she (I'd have to go back to the schedule to see if
> it was the senior author of the Nature paper) thought that community-scale
> calcification went down that much if corals could control pH (and aragonite
> saturation state) within their calcification spaces. She commented that the
> reef flat was dominated by coralline algae (which don't pump ions to my
> knowledge) with many fewer corals So, community structure counts and, as in
> the earlier discussion of ENSO, context and language count.
> Best,
> Denny
> On Thu, Feb 25, 2016 at 4:41 PM, Peter Sale <sale at uwindsor.ca> wrote:
>> Doug,
>> Thanks for these two links.  However, I thought that the idea that
>> calcification rates have already been depressed from preindustrial levels
>> was already established, at least for the GBR, by the work of De'ath et al
>> (the 2009 Science article) and Silverman et al 2014 in Geochimica and
>> Cosmochimica Acta:
>> http://journals1.scholarsportal.info/pdf/00167037/v144icomplete/72_cciligbra3p.xml
>> In other words, your links provide further support, rather than
>> establishing something new - or did I completely miss your point (certainly
>> possible)?
>> Peter Sale
>> web:                      www.petersalebooks.com<
>> http://www.petersalebooks.com/>
>> Twitter:                @PeterSale3
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> --
> Dennis Hubbard
> Chair, Dept of Geology-Oberlin College Oberlin OH 44074
> (440) 775-8346
> * "When you get on the wrong train.... every stop is the wrong stop"*
>  Benjamin Stein: "*Ludes, A Ballad of the Drug and the Dream*"

Douglas Fenner
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