Impact of high CO2 on the geochemistry of the coralline algae Lithothamnion glaciale
| Autor: | Federica Ragazzola, Daniela N. Schmidt, Laura C. Foster, Matt R. Kilburn, C. J. Jones, Thomas Bligh Scott, Jan Fietzke |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Geochemistry Spectrometry Mass Secondary Ion Mineralogy APC-PAID 01 natural sciences Article Calcium Carbonate chemistry.chemical_compound Microscopy Electron Transmission X-Ray Diffraction Benthos Nanotechnology Magnesium Ecosystem 14. Life underwater Biology 0105 earth and related environmental sciences Calcite Multidisciplinary biology 010604 marine biology & hydrobiology Temperature Coralline algae Carbon Dioxide biology.organism_classification Calcium carbonate chemistry Benthic zone Rhodophyta Carbon dioxide Microscopy Electron Scanning Carbonate Seasons |
| Zdroj: | Ragazzola, F, Foster, L C, Jones, C P, Scott, T B & Schmidt, D N 2016, ' Impact of high CO 2 on the geochemistry of the coralline algae Lithothamnion glaciale ', Scientific Reports, vol. 6, 20572 . https://doi.org/10.1038/srep20572 Ragazzola, F, Foster, L C, Jones, C J, Scott, T B, Fietzke, J, Kilburn, M R & Schmidt, D N 2016, ' Impact of high CO2 on the geochemistry of the coralline algae Lithothamnion glaciale ', Scientific Reports, vol. 6, 20572 . https://doi.org/10.1038/srep20572 Scientific Reports, 6 (20572). Scientific Reports |
| DOI: | 10.1038/srep20572 |
| Popis: | Coralline algae are a significant component of the benthic ecosystem. Their ability to withstand physical stresses in high energy environments relies on their skeletal structure which is composed of high Mg-calcite. High Mg-calcite is, however, the most soluble form of calcium carbonate and therefore potentially vulnerable to the change in carbonate chemistry resulting from the absorption of anthropogenic CO2 by the ocean. We examine the geochemistry of the cold water coralline alga Lithothamnion glaciale grown under predicted future (year 2050) high pCO2 (589 μatm) using Electron microprobe and NanoSIMS analysis. In the natural and control material, higher Mg calcite forms clear concentric bands around the algal cells. As expected, summer growth has a higher Mg content compared to the winter growth. In contrast, under elevated CO2 no banding of Mg is recognisable and overall Mg concentrations are lower. This reduction in Mg in the carbonate undermines the accuracy of the Mg/Ca ratio as proxy for past temperatures in time intervals with significantly different carbonate chemistry. Fundamentally, the loss of Mg in the calcite may reduce elasticity thereby changing the structural properties, which may affect the ability of L. glaciale to efficiently function as a habitat former in the future ocean. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|