dc.identifier.uri |
http://dx.doi.org/10.15488/1081 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/1105 |
|
dc.contributor.author |
Kaczmarek, Karina
|
|
dc.contributor.author |
Langer, G.
|
|
dc.contributor.author |
Nehrke, Gernot
|
|
dc.contributor.author |
Horn, Ingo
|
|
dc.contributor.author |
Misra, Sambuddha
|
|
dc.contributor.author |
Janse, M.
|
|
dc.contributor.author |
Bijma, Jelle
|
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dc.date.accessioned |
2017-02-02T13:57:11Z |
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dc.date.available |
2017-02-02T13:57:11Z |
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dc.date.issued |
2015 |
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dc.identifier.citation |
Kaczmarek, K.; Langer, G.; Nehrke, G.; Horn, I.; Misra, S. et al.: Boron incorporation in the foraminifer amphistegina lessonii under a decoupled carbonate chemistry. In: Biogeosciences 12 (2015), Nr. 6, S. 1753-1763. DOI: https://doi.org/10.5194/bg-12-1753-2015 |
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dc.description.abstract |
A number of studies have shown that the boron isotopic composition (delta B-11) and the B / Ca ratio of biogenic carbonates (mostly foraminifers) can serve as proxies for two parameters of the ocean's carbonate chemistry, rendering it possible to calculate the entire carbonate system. However, the B incorporation mechanism into marine carbonates is still not fully understood and analyses of field samples show species-specific and hydrographic effects on the B proxies complicating their application. Identifying the carbonate system parameter influencing boron incorporation is difficult due to the co-variation of pH, CO32- and B(OH)(4)(-). To shed light on the question which parameter of the carbonate system is related to the boron incorporation, we performed culture experiments with the benthic symbiont-bearing foraminifer Amphistegina lessonii using a decoupled pH-CO32- chemistry. The determination of the delta B-11 and B / Ca ratios was performed simultaneously by means of a new in situ technique combining optical emission spectroscopy and laser ablation MC-ICP-MS. The boron isotopic composition in the tests gets heavier with increasing pH and B / Ca increases with increasing B(OH)(4)(-) / HCO3- of the culture media. The latter indicates that boron uptake of A. lessonii features a competition between B(OH)(4)(-) and HCO3-. Furthermore, the simultaneous determination of B / Ca and delta B-11 on single specimens allows for assessing the relative variability of these parameters. Among different treatments the B / Ca shows an increasing variability with increasing boron concentration in the test whereas the variability in the isotope distribution is constant. |
eng |
dc.description.sponsorship |
DFG/BI 432/7-1 |
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dc.language.iso |
eng |
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dc.publisher |
Göttingen : Copernicus GmbH |
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dc.relation.ispartofseries |
Biogeosciences 12 (2015), Nr. 6 |
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dc.rights |
CC BY 3.0 Unported |
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dc.rights.uri |
https://creativecommons.org/licenses/by/3.0/ |
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dc.subject |
isotopic composition |
eng |
dc.subject |
globigerinoides-sacculifer |
eng |
dc.subject |
nanogram level |
eng |
dc.subject |
icp-ms |
eng |
dc.subject |
delta-b-11 |
eng |
dc.subject |
b/ca |
eng |
dc.subject |
ph |
eng |
dc.subject |
seawater |
eng |
dc.subject |
proxy |
eng |
dc.subject |
photosynthesis |
eng |
dc.subject.ddc |
550 | Geowissenschaften
|
ger |
dc.title |
Boron incorporation in the foraminifer amphistegina lessonii under a decoupled carbonate chemistry |
eng |
dc.type |
Article |
|
dc.type |
Text |
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dc.relation.essn |
1726-4189 |
|
dc.relation.issn |
1726-4170 |
|
dc.relation.doi |
https://doi.org/10.5194/bg-12-1753-2015 |
|
dc.bibliographicCitation.issue |
6 |
|
dc.bibliographicCitation.volume |
12 |
|
dc.bibliographicCitation.firstPage |
1753 |
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dc.bibliographicCitation.lastPage |
1763 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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