Environmental and biological controls on Na∕Ca ratios in scleractinian cold-water corals
- Here we present a comprehensive attempt to correlate aragonitic Na∕Ca ratios from Desmophyllum pertusum (formerly known as Lophelia pertusa), Madrepora oculata and a caryophylliid cold-water coral (CWC) species with different seawater parameters such as temperature, salinity and pH. Living CWC specimens were collected from 16 different locations and analyzed for their Na∕Ca ratios using solution-based inductively coupled plasma-optical emission spectrometry (ICP-OES) measurements. The results reveal no apparent correlation with salinity (30.1–40.57 g kg−1) but a significant inverse correlation with temperature (−0.31±0.04 mmolmol−1∘C−1). Other marine aragonitic organisms such as Mytilus edulis (inner aragonitic shell portion) and Porites sp. exhibit similar results highlighting the consistency of the calculated CWC regressions. Corresponding Na∕Mg ratios show a similar temperature sensitivity to Na∕Ca ratios, but the combination of two ratios appears to reduce the impact of vital effects and domain-dependent geochemical variation. The high degree of scatter and elemental heterogeneities between the different skeletal features in both Na∕Ca and Na∕Mg, however, limit the use of these ratios as a proxy and/or make a high number of samples necessary. Additionally, we explore two models to explain the observed temperature sensitivity of Na∕Ca ratios for an open and semi-enclosed calcifying space based on temperature-sensitive Na- and Ca-pumping enzymes and transport proteins that change the composition of the calcifying fluid and consequently the skeletal Na∕Ca ratio.
Author: | Nicolai SchleinkoferORCiDGND, Jacek RaddatzORCiDGND, André FreiwaldORCiDGND, David EvansORCiD, Lydia Beuck, Andres RüggebergORCiDGND, Volker LiebetrauGND |
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URN: | urn:nbn:de:hebis:30:3-525882 |
DOI: | https://doi.org/10.5194/bg-16-3565-2019 |
ISSN: | 1726-4189 |
Parent Title (English): | Biogeosciences |
Publisher: | Copernicus |
Place of publication: | Katlenburg-Lindau [u. a.] |
Contributor(s): | Aldo Shemesh |
Document Type: | Article |
Language: | English |
Year of Completion: | 2019 |
Date of first Publication: | 2019/09/20 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2019/12/23 |
Volume: | 16 |
Issue: | 18 |
Page Number: | 18 |
First Page: | 3565 |
Last Page: | 3582 |
Note: | © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License. |
Note: | Diskussionspapier erschienen in: Biogeosciences discussions, 2019, doi:10.5194/bg-2019-40 |
HeBIS-PPN: | 459377434 |
Institutes: | Geowissenschaften / Geographie / Geowissenschaften |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Sammlungen: | Universitätspublikationen |
Open-Access-Publikationsfonds: | Geowissenschaften / Geographie |
Licence (German): | Creative Commons - Namensnennung 4.0 |