[Coral-List] new coral-OA papers
Anne Cohen
acohen at whoi.edu
Fri Feb 10 10:46:11 EST 2017
Dear Colleagues
I am pleased to draw your attention to two new papers that may be of
interest:
*Community production modulates coral reef pH and the sensitivity of
ecosystem calcification to ocean acidification*, //DeCarlo, T. M./, /A.
L. Cohen/, /G. T. F. Wong/, /F.-K. Shiah/, /S. J. Lentz/, /K. A. Davis/,
/K. E. F. Shamberger/, and /P. Lohmann/(/2017/), J. Geophys. Res.
Oceans/, /122/, doi:10.1002/2016JC012326.
<http://dx.doi.org/10.1002/2016JC012326>Conducted on Dongsha Atoll,
northern south China Sea, this study highlights the role of benthic
communities in modulating the chemistry of reef seawater. Unlike Palau,
benthic algal productivity on the Dongsha reef flat counteracts the
impact of calcification on seawater pH, leading to daytime pH and
aragonite saturation well above that of the open ocean source water.
Consequently, rates of net community calcification are amongst the
highest ever measured. During a transient bleaching event, these
connections were disrupted, drawing attention to the dangers posed by
ocean warming on the ability of reefs to buffer against ocean
acidification.
*Mechanisms and thresholds for pH tolerance in Palau corals*
<http://dx.doi.org/10.1016/j.jembe.2017.01.003>/, ///Hannah C. Barkley,
Anne L. Cohen, Daniel C. McCorkle, Yimnang Golbuu (2017), /**
<http://dx.doi.org/10.1016/j.jembe.2017.01.003>Journal of Experimental
Marine Biology and Ecology, Volume 489, April 2017, Pages 7–14, doi:
10.1016/j.jembe.2017.01.003. /Two species of Palau corals maintain
calcification rates across a strong gradient in seawater pH (Barkley et
al., 2015). Here, we combined laboratory manipulation experiments with a
reciprocal transplant to investigate whether unique environmental
conditions in Palau’s low pH bays, or adaptation could account for the
apparent pH tolerance. In the experiment, Palau /Porite/s calcification
was unresponsive to pH down to 7.6 (Ω_ar = 1.5), exhibiting greater
tolerance than /Porites/ in several independent experiments. However,
/Porites/ from Palau’s low pH reefs failed to transplant successfully to
high pH reefs (and visa versa), suggesting local adaptation to other
(non-pH) factors that co-vary across Palau’s natural acidification
gradient.
Please contact us if you have any trouble with access,
best wishes
Anne, Hannah, Tom
--
Anne L. Cohen PhD
Tenured Associate Scientist
Woods Hole Oceanographic Institution
Mailstop #23
Woods Hole
MA 02543
Office: 508 289 2958
Lab: 508 289 3857
http://www.whoi.edu/cohenlab/
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