The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks
The shells of marine mollusks are widely used archives of past climate and ocean chemistry. Whilst the measurement of mollusk <i>δ</i><sup>18</sup>O to develop records of past climate change is a commonly used approach, it has proven challenging to develop reliable independen...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2013-07-01
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| Series: | Biogeosciences |
| Online Access: | http://www.biogeosciences.net/10/4591/2013/bg-10-4591-2013.pdf |
| _version_ | 1811238125444268032 |
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| author | R. A. Eagle J. M. Eiler A. K. Tripati J. B. Ries P. S. Freitas C. Hiebenthal A. D. Wanamaker Jr. M. Taviani M. Elliot S. Marenssi K. Nakamura P. Ramirez K. Roy |
| author_facet | R. A. Eagle J. M. Eiler A. K. Tripati J. B. Ries P. S. Freitas C. Hiebenthal A. D. Wanamaker Jr. M. Taviani M. Elliot S. Marenssi K. Nakamura P. Ramirez K. Roy |
| author_sort | R. A. Eagle |
| collection | DOAJ |
| description | The shells of marine mollusks are widely used archives of past climate and ocean chemistry. Whilst the measurement of mollusk <i>δ</i><sup>18</sup>O to develop records of past climate change is a commonly used approach, it has proven challenging to develop reliable independent paleothermometers that can be used to deconvolve the contributions of temperature and fluid composition on molluscan oxygen isotope compositions. Here we investigate the temperature dependence of <sup>13</sup>C–<sup>18</sup>O bond abundance, denoted by the measured parameter Δ<sub>47</sub>, in shell carbonates of bivalve mollusks and assess its potential to be a useful paleothermometer. We report measurements on cultured specimens spanning a range in water temperatures of 5 to 25 °C, and field collected specimens spanning a range of −1 to 29 °C. In addition we investigate the potential influence of carbonate saturation state on bivalve stable isotope compositions by making measurements on both calcitic and aragonitic specimens that have been cultured in seawater that is either supersaturated or undersaturated with respect to aragonite. We find a robust relationship between Δ<sub>47</sub> and growth temperature. We also find that the slope of a linear regression through all the Δ<sub>47</sub> data for bivalves plotted against seawater temperature is significantly shallower than previously published inorganic and biogenic carbonate calibration studies produced in our laboratory and go on to discuss the possible sources of this difference. We find that changing seawater saturation state does not have significant effect on the Δ<sub>47</sub> of bivalve shell carbonate in two taxa that we examined, and we do not observe significant differences between Δ<sub>47</sub>-temperature relationships between calcitic and aragonitic taxa. |
| first_indexed | 2024-04-12T12:36:19Z |
| format | Article |
| id | doaj.art-6dd83bed8e5d469fb027f440f08666a3 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-04-12T12:36:19Z |
| publishDate | 2013-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-6dd83bed8e5d469fb027f440f08666a32022-12-22T03:32:53ZengCopernicus PublicationsBiogeosciences1726-41701726-41892013-07-011074591460610.5194/bg-10-4591-2013The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusksR. A. EagleJ. M. EilerA. K. TripatiJ. B. RiesP. S. FreitasC. HiebenthalA. D. Wanamaker Jr.M. TavianiM. ElliotS. MarenssiK. NakamuraP. RamirezK. RoyThe shells of marine mollusks are widely used archives of past climate and ocean chemistry. Whilst the measurement of mollusk <i>δ</i><sup>18</sup>O to develop records of past climate change is a commonly used approach, it has proven challenging to develop reliable independent paleothermometers that can be used to deconvolve the contributions of temperature and fluid composition on molluscan oxygen isotope compositions. Here we investigate the temperature dependence of <sup>13</sup>C–<sup>18</sup>O bond abundance, denoted by the measured parameter Δ<sub>47</sub>, in shell carbonates of bivalve mollusks and assess its potential to be a useful paleothermometer. We report measurements on cultured specimens spanning a range in water temperatures of 5 to 25 °C, and field collected specimens spanning a range of −1 to 29 °C. In addition we investigate the potential influence of carbonate saturation state on bivalve stable isotope compositions by making measurements on both calcitic and aragonitic specimens that have been cultured in seawater that is either supersaturated or undersaturated with respect to aragonite. We find a robust relationship between Δ<sub>47</sub> and growth temperature. We also find that the slope of a linear regression through all the Δ<sub>47</sub> data for bivalves plotted against seawater temperature is significantly shallower than previously published inorganic and biogenic carbonate calibration studies produced in our laboratory and go on to discuss the possible sources of this difference. We find that changing seawater saturation state does not have significant effect on the Δ<sub>47</sub> of bivalve shell carbonate in two taxa that we examined, and we do not observe significant differences between Δ<sub>47</sub>-temperature relationships between calcitic and aragonitic taxa.http://www.biogeosciences.net/10/4591/2013/bg-10-4591-2013.pdf |
| spellingShingle | R. A. Eagle J. M. Eiler A. K. Tripati J. B. Ries P. S. Freitas C. Hiebenthal A. D. Wanamaker Jr. M. Taviani M. Elliot S. Marenssi K. Nakamura P. Ramirez K. Roy The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks Biogeosciences |
| title | The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks |
| title_full | The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks |
| title_fullStr | The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks |
| title_full_unstemmed | The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks |
| title_short | The influence of temperature and seawater carbonate saturation state on <sup>13</sup>C–<sup>18</sup>O bond ordering in bivalve mollusks |
| title_sort | influence of temperature and seawater carbonate saturation state on sup 13 sup c sup 18 sup o bond ordering in bivalve mollusks |
| url | http://www.biogeosciences.net/10/4591/2013/bg-10-4591-2013.pdf |
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