Drought recorded by Ba∕Ca in coastal benthic foraminifera
Abstract Ba/Ca) of foraminiferal calcium carbonates accumulating in sediments. However, so far the use of Ba/Ca as a discharge indicator has been restricted to planktonic foraminifera, despite the high relative abundance of benthic species in coastal, shallow-water sites. Moreover, benthic foraminiferal Ba/Ca has mainly been used in open-ocean records as a proxy for paleo-productivity. Here we report on a new geochemical data set measured from living (CTG-labeled) benthic foraminiferal species to investigate the capability of benthic Ba/Ca to record changes in river runoff over a gradient of contrasting hydroclimatic conditions. Individual foraminifera (Bulimina marginata Ba/Ca correlates significantly to riverine runoff; however, the signals contain both spatial trends with distance to Ba source and species-specific influences such as micro-habitat preferences. We deduce that shallow-infaunal foraminifera are especially suitable as proxy for terrestrial Ba input and discuss the potential influence of water-column and pore-water Ba cycling. While distance to Ba source, water depth, pore-water geochemistry, and species-specific effects need to be considered in interpreting the data, our results demonstrate confidence in the use of Ba/Ca of benthic foraminifera from near-continent records as a proxy for past riverine discharge and to identify periods of drought.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Drought recorded by Ba∕Ca in coastal benthic foraminifera ; volume:19 ; number:9 ; year:2022 ; pages:2523-2535 ; extent:13
Biogeosciences ; 19, Heft 9 (2022), 2523-2535 (gesamt 13)
- Creator
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Brinkmann, Inda
Barras, Christine
Jilbert, Tom
Næraa, Tomas
Paul, K. Mareike
Schweizer, Magali
Filipsson, Helena L.
- DOI
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10.5194/bg-19-2523-2022
- URN
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urn:nbn:de:101:1-2022051905340301250835
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:29 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Brinkmann, Inda
- Barras, Christine
- Jilbert, Tom
- Næraa, Tomas
- Paul, K. Mareike
- Schweizer, Magali
- Filipsson, Helena L.
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Benthic Foraminifera of the Peruvian and Ecuadorian Continental Margin
Drought recorded by Ba/Ca in coastal benthic foraminifera
Widespread intra-specific genetic homogeneity of coastal Antarctic benthic foraminifera
Ba incorporation in benthic foraminifera
Bottom-water deoxygenation at the Peruvian Margin during the last deglaciation recorded by benthic foraminifera
Extreme lowering of deglacial seawater radiocarbon content is recorded by both epifaunal and infaunal benthic foraminifera
Global change stress on symbiont-bearing benthic foraminifera
Distribution of chlorine and fluorine in benthic foraminifera
Global change stress on symbiont-bearing benthic foraminifera
Benthic Foraminifera as Proxies in Contourite Drift Systems
Extreme lowering of deglacial seawater radiocarbon recorded by both epifaunal and infaunal benthic foraminifera in a wood-dated sediment core
Benthic foraminifera of the Peruvian and Ecuadorian continental margin
Benthic Foraminifera of the Peruvian and Ecuadorian Continental Margin
Drought recorded by Ba/Ca in coastal benthic foraminifera
Widespread intra-specific genetic homogeneity of coastal Antarctic benthic foraminifera
Ba incorporation in benthic foraminifera
Bottom-water deoxygenation at the Peruvian Margin during the last deglaciation recorded by benthic foraminifera
Extreme lowering of deglacial seawater radiocarbon content is recorded by both epifaunal and infaunal benthic foraminifera
Global change stress on symbiont-bearing benthic foraminifera
Distribution of chlorine and fluorine in benthic foraminifera
Global change stress on symbiont-bearing benthic foraminifera
Benthic Foraminifera as Proxies in Contourite Drift Systems
Extreme lowering of deglacial seawater radiocarbon recorded by both epifaunal and infaunal benthic foraminifera in a wood-dated sediment core
Benthic foraminifera of the Peruvian and Ecuadorian continental margin