Nanoscale trace metal imprinting of biocalcification of planktic foraminifers by Toba’s super-eruption

Lemelle, Laurence; Bartolini, Annachiara; Simionovici, Alexandre; Tucoulou, R.; Nolf, Wout De; Bassinot, Franck; Garidel‐Thoron, Thibault de

doi:10.1038/s41598-020-67481-w

Cited by 4 publications

(3 citation statements)

References 53 publications

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“…In specimens of the benthic Rosalina leei subjected to inorganic mercury (HgCl 2 dissolved in seawater) the growth rate and maximum size decreased considerably (Nigam et al., 2009; Saraswat et al., 2004). Specimens of Globorotalia menardii extracted from the Young Toba Tuff layer (74,000 years ago) show incorporation of trace metals in the wall but no test‐size reduction (Lemelle et al., 2020). As planktic foraminifera from ETM2 are all extinct forms we cannot evaluate a possible negative impact of trace metals on their test‐size.…”

Section: Environmental Context Across the Etm2 And Drivers Of Tethyan...mentioning

confidence: 99%

Extreme Planktic Foraminiferal Dwarfism Across the ETM2 in the Tethys Realm in Response to Warming

D’Onofrio,

Barrett,

Schmidt

et al. 2024

Paleoceanog and Paleoclimatol

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Pronounced warming negatively impacts ecosystem resilience in modern oceans. To offer a long‐term geological perspective of the calcareous plankton response to global warming, we present an integrated record, from two Tethyan sections (northeastern Italy), of the planktic foraminiferal and calcareous nannofossil response to the Eocene Thermal Maximum 2 hyperthermal (ETM2, ∼54 Ma). Our study reveals pronounced changes in assemblage composition and a striking dwarfing of planktic foraminiferal tests of up to 40% during the event, impacting both surface and deeper dwellers. The increased abundance of small placoliths among calcareous nannofossils is interpreted as community size reduction. Literature and our foraminiferal size data from Sites 1263 and 1209 (Atlantic and Pacific Oceans) highlights that the pronounced dwarfism is restricted to the Tethyan area. The ETM2 is characterized by warm sea surface temperatures as indicated by our δ18O data, but this warming is of global extent and cannot explain the unique dwarfism. Excluding evolutionary modifications, other potential drivers of dwarfism (eutrophication, deoxygenation, metabolic adaptation) cannot explain the exceptional dwarfism by themselves. The smallest sizes are in close temporal association with peaks in volcanic derived Hg/Th‐Hg/Rb recorded just before and at the ETM2 which could not have been brought into our sections through weathering. In contrast, size reductions are absent below and above the ETM2 at Hg peaks where δ18O data do not show warm conditions. We speculate that the local input of toxic metals from submarine volcanic emissions could have acted synergistically to warming, causing the unique dwarfism.

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Section: Environmental Context Across the Etm2 And Drivers Of Tethyan...mentioning

confidence: 99%

Extreme Planktic Foraminiferal Dwarfism Across the ETM2 in the Tethys Realm in Response to Warming

D’Onofrio,

Barrett,

Schmidt

et al. 2024

Paleoceanog and Paleoclimatol

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“…Ash fallouts from volcanic super-eruptions have a potentially toxic impact on biocalcifier planktic microorganisms. Lemelle et al 39 demonstrated a method to detect past bioactive metal releases in ocean surface water . The use of nanoXRF imaging revealed successfully a specific Zn- and Mn-rich banding pattern in the test walls of Globorotalia menardii planktic foraminifers extracted from the Young Toba Tuff layer which corresponded to Toba’s super-eruption 74 000 years ago.…”

Section: Synchrotron and Large-scale Facilitiesmentioning

confidence: 99%

Atomic spectrometry update – a review of advances in X-ray fluorescence spectrometry and its special applications

Vanhoof

Bacon

Fittschen

et al. 2021

J. Anal. At. Spectrom.

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“…Davis et al (2020) relate the foraminiferal Mn/Ca to deep-water upwelling. Another study suggests Mn-incorporation into the planktic foraminifer shell by volcanogenic input from the Toba super-eruption (Lemelle et al, 2020).…”

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confidence: 99%

High Precision Femtosecond Laser Ablation ICP‐MS Measurement of Benthic Foraminiferal Mn‐Incorporation for Paleoenvironmental Reconstruction: A Case Study From the Plio‐Pleistocene Caribbean Sea

Öğretmen

Schiebel

Jochum

et al. 2022

Geochem Geophys Geosyst

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Trace elements in foraminiferal calcite are among the most commonly used proxies for reconstructing paleoenvironmental conditions. For instance, Mg/Ca of foraminifer test carbonate is proxy of past temperature variations of ambient seawater (Friedrich et al., 2013;Lear et al., 2000;Nürnberg et al., 1996). B/Ca is used as a surface seawater pH proxy (Yu et al., 2007). In contrast to the proxies of environmental conditions during shell formation, some trace elements are considered proxy of dissolution or encrustation of the original test carbonate. For example, trace metal oxides may crystallize through post-mortem secondary precipitation processes such as authigenic coatings on the foraminifer test (Boyle, 1983) and vigorous cleaning techniques are required for their removal (Barker et al., 2003). Nevertheless, a recent study demonstrates that such cleaning methods cause dissolution of the inner calcite resulting in removal of potentially important environmental indicators including Mn (Fritz-Endres & Fehrenbacher, 2020). Novel results suggest Mn is preferentially incorporated in the ontogenetic carbonate lattice to enhance its chemical stability (Soldati et al., 2016;Son et al., 2019).In oxygenated waters, manganese is dissolved at low concentration (van Hulten et al., 2017), with a residence time of up to 60 years in the water column below 1,500 m (Martin & Knauer, 1980). In seafloor sediments, Mn is found in oxidized forms only in the uppermost oxic layer, and mobilizes under suboxic and anoxic conditions as Mn(II) as well as Mn(III)-ligand complexes (Trouwborst et al., 2006), being an indicator of

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Nanoscale trace metal imprinting of biocalcification of planktic foraminifers by Toba’s super-eruption

Cited by 4 publications

References 53 publications

Extreme Planktic Foraminiferal Dwarfism Across the ETM2 in the Tethys Realm in Response to Warming

Extreme Planktic Foraminiferal Dwarfism Across the ETM2 in the Tethys Realm in Response to Warming

Atomic spectrometry update – a review of advances in X-ray fluorescence spectrometry and its special applications

High Precision Femtosecond Laser Ablation ICP‐MS Measurement of Benthic Foraminiferal Mn‐Incorporation for Paleoenvironmental Reconstruction: A Case Study From the Plio‐Pleistocene Caribbean Sea

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