Greenhouse conditions induce mineralogical changes and dolomite accumulation in coralline algae on tropical reefs

Diaz-Pulido, Guillermo, Nash, Merinda C., Anthony, Kenneth R. N., Bender, Dorothea, Opdyke, Bradley N., Reyes-Nivia, Catalina and Troitzsch, Ulrike (2014) Greenhouse conditions induce mineralogical changes and dolomite accumulation in coralline algae on tropical reefs. Nature Communications, 5 3310.1-3310.9. doi:10.1038/ncomms4310


Author Diaz-Pulido, Guillermo
Nash, Merinda C.
Anthony, Kenneth R. N.
Bender, Dorothea
Opdyke, Bradley N.
Reyes-Nivia, Catalina
Troitzsch, Ulrike
Title Greenhouse conditions induce mineralogical changes and dolomite accumulation in coralline algae on tropical reefs
Journal name Nature Communications   Check publisher's open access policy
ISSN 2041-1723
Publication date 2014-02
Year available 2014
Sub-type Article (original research)
DOI 10.1038/ncomms4310
Open Access Status DOI
Volume 5
Start page 3310.1
End page 3310.9
Total pages 9
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2015
Language eng
Formatted abstract
Human-induced ocean acidification and warming alter seawater carbonate chemistry reducing the calcification of reef-building crustose coralline algae (CCA), which has implications for reef stability. However, due to the presence of multiple carbonate minerals with different solubilities in seawater, the algal mineralogical responses to changes in carbonate chemistry are poorly understood. Here we demonstrate a 200% increase in dolomite concentration in living CCA under greenhouse conditions of high pCO2 (1,225 μatm) and warming (30 °C). Aragonite, in contrast, increases with lower pCO2 (296 μatm) and low temperature (28 °C). Mineral changes in the surface pigmented skeleton are minor and dolomite and aragonite formation largely occurs in the white crust beneath. Dissolution of high-Mg-calcite and particularly the erosive activities of endolithic algae living inside skeletons play key roles in concentrating dolomite in greenhouse treatments. As oceans acidify and warm in the future, the relative abundance of dolomite in CCA will increase.
Keyword Skeletal Mineralogy
Biological Calcification
Carbonate Mineralogy
Disordered Dolomite
Secular Variation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Global Change Institute Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 17 times in Scopus Article | Citations
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Created: Sun, 20 Apr 2014, 00:10:09 EST by System User on behalf of Global Change Institute