Microelectrode characterization of coral daytime interior pH and carbonate chemistry
| Autor: | D. Tye Pettay, Ye Ying, Xiangchen Yuan, Justin H. Baumann, Todd F. Melman, Brian M. Hopkinson, Chenhua Han, Stephen Levas, Verena Schoepf, Mark E. Warner, Wei-Jun Cai, Yongchen Wang, Yohei Matsui, Hui Xu, Yuening Ma, Xinping Hu, Qian Ding, Andréa G. Grottoli, Kenneth D. Hoadley |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
010504 meteorology & atmospheric sciences Coral Science Carbonates General Physics and Astronomy Mineralogy engineering.material 01 natural sciences General Biochemistry Genetics and Molecular Biology Article 03 medical and health sciences chemistry.chemical_compound Anthozoa Dissolved organic carbon Animals 14. Life underwater 0105 earth and related environmental sciences Multidisciplinary biology Chemistry Aragonite fungi technology industry and agriculture Ocean acidification General Chemistry Hydrogen-Ion Concentration biology.organism_classification 030104 developmental biology 13. Climate action Environmental chemistry engineering Carbonate Ion Carbonate Saturation (chemistry) Microelectrodes geographic locations |
| Zdroj: | Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Reliably predicting how coral calcification may respond to ocean acidification and warming depends on our understanding of coral calcification mechanisms. However, the concentration and speciation of dissolved inorganic carbon (DIC) inside corals remain unclear, as only pH has been measured while a necessary second parameter to constrain carbonate chemistry has been missing. Here we report the first carbonate ion concentration ([CO32−]) measurements together with pH inside corals during the light period. We observe sharp increases in [CO32−] and pH from the gastric cavity to the calcifying fluid, confirming the existence of a proton (H+) pumping mechanism. We also show that corals can achieve a high aragonite saturation state (Ωarag) in the calcifying fluid by elevating pH while at the same time keeping [DIC] low. Such a mechanism may require less H+-pumping and energy for upregulating pH compared with the high [DIC] scenario and thus may allow corals to be more resistant to climate change related stressors. Predicting coral response to ocean acidification is dependent on our understanding of their internal carbonate chemistry. Here, using microelectrodes, the authors show that corals elevate pH and carbonate ion concentration in their calcifying fluid, but keep total dissolved inorganic carbon low. |
| Databáze: | OpenAIRE |
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