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Author Shaw, Emily ♦ Tilbrook, Bronte ♦ Steven, Andrew D L ♦ Phinn, Stuart R
Source PANGAEA
Content type Text
Publisher PANGAEA
File Format TSV
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences
Subject Keyword Chemistry ♦ Benthos ♦ Calcification/Dissolution ♦ Coast and continental shelf ♦ Entire community ♦ Field observation ♦ Primary production/Photosynthesis ♦ Rocky-shore community ♦ South Pacific ♦ Temperate
Abstract There are few in situ studies showing how net community calcification (Gnet) of coral reefs is related to carbonate chemistry, and the studies to date have demonstrated different predicted rates of change. In this study, we measured net community production (Pnet), Gnet, and carbonate chemistry of a reef flat at One Tree Island, Great Barrier Reef. Diurnal pCO2 variability of 289-724 µatm was driven primarily by photosynthesis and respiration. The reef flat was found to be net autotrophic, with daily production of ~ 35 mmol C/m**2/d and net calcification of ~ 33 mmol C/m**2/d . Gnet was strongly related to Pnet, which drove a hysteresis pattern in the relationship between Gnet and aragonite saturation state (Omega ar). Although Pnet was the main driver of Gnet, Omega ar was still an important factor, where 95% of the variance in Gnet could be described by Pnet and Omega ar. Based on the observed in situ relationship, Gnet would be expected to reach zero when Omega ar is 2.5. It is unknown what proportion of a decline in Gnet would be through reduced calcification and what would occur through increased dissolution, but the results here support predictions that overall calcium carbonate production will decline in coral reefs as a result of ocean acidification.
Temporal Coverage 2013-11-08T17:28:00/2013-11-22T13:56:00
Spatial Coverage Latitude: -23.507540;Longitude: 152.089334
Description Project(s):Ocean Acidification International Coordination Centre (OA-ICC);Note: 1810 data points
Part of series Supplement to: Shaw, Emily; Phinn, Stuart R; Tilbrook, Bronte; Steven, Andrew D L (2015): Natural in situ relationships suggest coral reef calcium carbonate production will decline with ocean acidification. Limnology and Oceanography, https://doi.org/10.1002/lno.10048
Educational Use Research
Learning Resource Type Data Set
Publisher Date 2014-08-21
Rights License https://creativecommons.org/licenses/by/3.0/


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