Impact of the Middle Jurassic diversification of Watznaueria (coccolith-bearing algae) on the carbon cycle and δ13C of bulk marine carbonates

Suchéras-Marx, Baptiste; Guihou, Abel; Giraud, Fabienne; Lécuyer, Christophe; Allemand, Pascal; Pittet, Bernard; Mattioli, Emanuela

doi:10.1016/j.gloplacha.2012.02.007

Cited by 39 publications

(42 citation statements)

References 44 publications

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“…Some studies have shown that high accumulation rates of nannofossils can reflect an increase in productivity of surface waters in the Mesozoic (Mattioli and Pittet, 2002;Bornemann et al, 2003;Gréselle et al, 2011). This interpretation is enforced by a slight increase in δ 13 C values (Suchéras-Marx et al, 2012) recorded in the Cabo Mondego section from the Late Aalenian to the Early Bajocian (Fig. 3).…”

Section: Paleoenvironmental/paleoceanographic Conditions and Discorhamentioning

confidence: 92%

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Discorhabdus as a key coccolith genus for paleoenvironmental reconstructions (Middle Jurassic, Lusitanian Basin): Biometry and taxonomic status

López-Otálvaro

Suchéras-Marx

Giraud

et al. 2012

Marine Micropaleontology

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Section: Paleoenvironmental/paleoceanographic Conditions and Discorhamentioning

confidence: 92%

“…The codes of the samples analyzed for biometry are in black, while the codes of the samples in grey correspond to supplementary samples studied for abundances, accumulation rates and carbon isotopes(Suchéras-Marx et al, 2012).…”

mentioning

confidence: 99%

Discorhabdus as a key coccolith genus for paleoenvironmental reconstructions (Middle Jurassic, Lusitanian Basin): Biometry and taxonomic status

López-Otálvaro

Suchéras-Marx

Giraud

et al. 2012

Marine Micropaleontology

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“…With the unprecedented turnover leading to their average size reduction since the late Miocene, the nannoplankton reign on the pelagic carbonate accumulation has been greatly diminished. It could even be supposed that calcareous nannoplankton ruled the pelagic carbonate production since their first occurrence in the fossil record in the Late Triassic (Preto et al, 2013) although the pelagic carbonate mass accumulation remained rather low until the Cretaceous (Bornemann et al, 2003;Gréselle et al, 2011;Suchéras-Marx et al, 2012). Calcareous nannoplankton represented the most prominent marine primary producers (preserved in the fossil record) for most of the Cenozoic.…”

Section: Evolution Towards a "Modern" Pelagic Carbonate Compositionmentioning

confidence: 99%

Downsizing the pelagic carbonate factory: Impacts of calcareous nannoplankton evolution on carbonate burial over the past 17 million years

Suchéras-Marx

Henderiks

2014

Global and Planetary Change

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International audienceCenozoic deep-sea carbonates (“calcareous oozes”) are predominantly biogenic in origin and offer detailed records of the evolution of calcifying plankton groups, such as coccolithophores and foraminifera. The size and abundance of calcifying plankton determine the strength of the calcium carbonate “pump” in the open ocean, which acts as a short-term source of CO2, while the burial of pelagic carbonates serves as a long-term sink of carbon. Here, we show how the macroevolutionary size decrease in calcareous nannoplankton (coccoliths and calcareous nannoliths) has affected burial rates of calcareous ooze over the past 17 million years. We quantified nannofossil carbonate burial rates (g CaCO3/m2/yr) at five DSDP/ODP sites in the Atlantic, Indian, and Western Pacific oceans. The proportion of nannofossil-dominated fine fraction carbonate (< 38 μm) and its mass accumulation rates were regionally and temporally variable, but our combined data reveal globally consistent long-term trends. Mean nannofossil carbonate mass decreased about four-fold between 9 and 4 Ma, but this had little or only minor impact on the burial of pelagic carbonate until ~ 4 Ma. After ~ 4 Ma, when small-sized coccolith-bearing species prevailed, nannofossil carbonate burial rates decreased by one order of magnitude to the lowest values during the Pleistocene. In contrast, mass accumulation rates of the foraminifera-dominated > 38 μm fraction remained stable over the past 17 Myr. This suggests that changes in the deposition of calcareous ooze were primarily driven by calcareous nannoplankton, and that foraminifera did not compensate for the lower nannofossil-carbonate accumulation rates since the Pliocene. Despite a deepening of the lysocline over the past 4 Myr, global pelagic carbonate mass accumulation likely decreased. Whether, or how, this may relate to changes in weathering or other components within the long-term carbonate cycle remains unclear. Explanations for the macroevolutionary size decrease in calcareous nannoplankton focus on the physiological and ecological advantages of small, lightly calcified algal cells in a low-CO2 and more stratified marine environment

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“…Nevertheless, their contribution to the carbon flux toward the ocean interior is twofold since calcite also acts as a ballast for the organic carbon (Klaas et al, 2002). Eventually, calcareous nannofossils represent about half of the extant pelagic carbonate sediments in the oceanic realm (Baumann et al, 2004;Broecker and Clark, 2009), and accounted for even more in Neogene sediments despite their small size (Suchéras-Marx and Henderiks, 2014). Conversely, during the early coccolithophore evolution, they only represented a minor contribution to the total calcium carbonate in sediments, with extremely low nannofossil accumulation rates in the Jurassic period (Mattioli et al, 2009;Suchéras-Marx et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Eventually, calcareous nannofossils represent about half of the extant pelagic carbonate sediments in the oceanic realm (Baumann et al, 2004;Broecker and Clark, 2009), and accounted for even more in Neogene sediments despite their small size (Suchéras-Marx and Henderiks, 2014). Conversely, during the early coccolithophore evolution, they only represented a minor contribution to the total calcium carbonate in sediments, with extremely low nannofossil accumulation rates in the Jurassic period (Mattioli et al, 2009;Suchéras-Marx et al, 2012). There is then a transition from Jurassic calcareous nannofossil-poor to Late Cretaceous and Cenozoic calcareous nannofossil-rich oceanic sediments, which has shifted the carbonate accumulation sustained by benthic organisms from neritic environments to an accumulation in pelagic environments supported by planktic organisms.…”

Section: Introductionmentioning

confidence: 99%

Updated Supplementary material

Suchéras-Marx¹

2019

Preprint

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The rise of calcareous nannoplankton in Mesozoic oceans has deeply impacted ocean chemistry and contributed to shaping modern oceans. Nevertheless, the calcareous nannoplankton colonization of past marine environments remains poorly understood. Based on an extensive compilation of published and unpublished data, we show that their accumulation rates in sediments increased from the Early Jurassic ( ∼ 200 Ma) to the Early Cretaceous (∼ 120 Ma), although these algae diversified up to the end of the Mesozoic (66 Ma). After the middle Eocene (∼ 45 Ma), a decoupling occurred between accumulation rates, diversity and coccolith size. The time series analyzed points toward a threephase evolutionary dynamic. An invasion phase of the openocean realms was followed by a specialization phase occurring along with taxonomic diversification, ended by an establishment phase where a few small-sized species dominated. The current hegemony of calcareous nannoplankton in the world ocean results from a long-term and complex evolutionary history shaped by ecological interactions and abiotic forcing.Published by Copernicus Publications on behalf of the European Geosciences Union.

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Impact of the Middle Jurassic diversification of Watznaueria (coccolith-bearing algae) on the carbon cycle and δ13C of bulk marine carbonates

Cited by 39 publications

References 44 publications

Discorhabdus as a key coccolith genus for paleoenvironmental reconstructions (Middle Jurassic, Lusitanian Basin): Biometry and taxonomic status

Discorhabdus as a key coccolith genus for paleoenvironmental reconstructions (Middle Jurassic, Lusitanian Basin): Biometry and taxonomic status

Downsizing the pelagic carbonate factory: Impacts of calcareous nannoplankton evolution on carbonate burial over the past 17 million years

Updated Supplementary material

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