Multiple crises preceded the Mediterranean Salinity Crisis: Aridification and vegetation changes revealed by biomarkers and stable isotopes

Butiseaca, Geanina; Meer, Marcel T. J. van der; Kontakiotis, George; Agiadi, Konstantina; Thivaiou, Danae; Besiou, Evangelia; Antonarakou, Assimina; Mulch, Andreas; Vasiliev, Iuliana

doi:10.1016/j.gloplacha.2022.103951

Cited by 14 publications

(23 citation statements)

References 66 publications

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“…After 6.8 Ma, when the high sea bottom salinity is coupled to SST increases, the benthic fish metabolic demands increase as well (Figure 3, Table S1). Negative peaks in δ 13 C B.albyi and δ 13 C L.friesii at 6.97-6.96 Ma coincide with increased relative production of organic matter from marine versus terrestrial sources indicated by BIT (Figure 3A) (Butiseacă et al, 2022) during sapropel formation, with greater preservation of organic matter, and probably greater production by higher organisms even within bottom waters (Figure 4B, C), which is not picked up by δ 13 C G.obliquus and δ 13 C C.ung . However, the negative peak of δ 13 C B.albyi at 6.88-6.85 Ma (Figure 3C) is accompanied by a shift in the organic matter source, from more terrestrial (higher BIT) at 6.88 Ma, to more marine (lower BIT) at 6.85 Ma (Figure 3A).…”

Section: Fishes Metabolic Responsesmentioning

confidence: 89%

“…. (Kontakiotis et al, 2022); d) the ratio of isoprenoidal glycerol dialkyl glycerol tetraethers 2 and 3 (isoGDGT2/isoGDGT3) (Kontakiotis et al, 2022), which increases with isoGDGTs input from subsurfacedwelling archaea (Schouten et al, 2002); and e) BIT (branched and isoprenoid tetraether) index values (Butiseacă et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

“…The event at 6.82-6.81 Ma strongly impacts fish metabolism (Figures 3D, 3G, 4D), as seen in the negative peak of δ 13 C B.albyi and positive shifts of M B.albyi and M L.friesii , which are accompanied by a BIT shift (Figure 3A) to increased relative contribution of terrestrial organic matter (Butiseacă et al, 2022) and to maximum in isoGDGT2/isoGDGT3 (Figure 2D). Together with the δ 18 O patterns, this event points to a temporary influx of high-nutrient terrestrial material, leading to phytoplankton bloom and consequent increase in zooplankton abundance, which provides more food for the fish population both in surface and bottom waters (Figure 4D).…”

Section: Fishes Metabolic Responsesmentioning

confidence: 99%

“…Figures 2H, S1), the δ 18 O B.albyi pattern reflects a short-lived event of remarkable negative water budget at 6.82 Ma(Butiseacă et al, 2022), and δ 18 O B.albyi stabilizes already at 6.81 Ma. δ 18 O L.friesii shows the same shifts (Figure…”

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confidence: 90%

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Coupled otolith and foraminifera oxygen and carbon stable isotopes evidence paleoceanographic changes and fish metabolic responses

Agiadi¹,

Vasiliev²,

Butiseacă³

et al. 2024

Preprint

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Stable oxygen and carbon isotopic composition of the otoliths of a pelagic and a benthic fish species are used as indicators of sea surface and bottom salinity-oxygenation conditions, as well as proxies of the fishes’ metabolic response to the paleoceanographic changes in the eastern Mediterranean from 7.2 to 6.5 Ma. The step-wise restriction of the Mediterranean–Atlantic gateway impacted the ability of the Mediterranean fishes to grow, particularly those dwelling in the sea bottom. The most important changes identified are: 1) a negative water budget (evaporative) event at 6.82–6.81 Ma that resulted in an increase in fish metabolism and respiration, and 2) a warming event at 6.70–6.69 Ma that further intensified the environmental stress for bottom-water fish and increased their metabolic activity despite low food availability. The results provide proof that the resilience of the benthic fish population was hampered, particularly after the 6.70–6.69 Ma event, due to the increased salinity, temperature and stratification of the water column in the eastern Mediterranean as a result of the marine gateway restriction.

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Section: Fishes Metabolic Responsesmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Fishes Metabolic Responsesmentioning

confidence: 99%

mentioning

confidence: 90%

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Coupled otolith and foraminifera oxygen and carbon stable isotopes evidence paleoceanographic changes and fish metabolic responses

Agiadi¹,

Vasiliev²,

Butiseacă³

et al. 2024

Preprint

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“…Deposition took place along a convergent margin within deformed basins, which recorded a progressive deterioration of environmental conditions at the onset of Messinian times [5][6][7][8][9][10]. Additionally, during Messinian and Plio-Pleistocene times, cyclic episodes of anoxia led to the deposition of organic-rich deposits (sapropels; [11,12]).…”

Section: Introductionmentioning

confidence: 99%

Toward an Astrochronology-Based Age-Model for a Messinian Pre-Evaporitic Succession: The Example of Torrente Vaccarizzo Section in Sicily (Italy)

Maniscalco

Forzese

Barbagallo

et al. 2023

JMSE

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Tectonic, paleoenvironmental, and paleoclimatic unstable conditions preceding the onset of the Messinian Salinity Crisis (MSC) highly affected marine life. Changes in calcareous plankton association are overall registered in the Mediterranean. They consist of a general transition from abundant and well-diversified planktonic associations to strictly oligotypic assemblages that precede their total disappearance at the onset of evaporitic precipitation. In this work, an accurate quantitative analysis of calcareous plankton, both foraminifers and nannofossils, has been carried out in the Torrente Vaccarizzo Section of Sicily (southern Italy). The aim is to independently define a chronostratigraphic pattern of bioevents preceding the MSC in the absence of magnetostratigraphic or radiometric constraints. The fluctuating abundance of the genus Orbulina fits well with the 100 ky Eccentricity maxima, and it is successfully applied to build an astronomically calibrated age-model for the section. On this basis, all the biohorizons have been recalibrated and discussed with regard to the previous literature. Abundant influxes of selected species demonstrated to be of local significance since they are highly affected by paleoenvironmental and paleoclimatic conditions. A chronological sequence of foraminifers and nannofossils events marks the onset of the MSC with a derived age of 5.957 My, which agrees well with previous findings from other Mediterranean sections. This methodology and the new biostratigraphic events may be useful for future studies on pre-evaporitic successions of the Mediterranean.

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Sensitivity of the thermohaline circulation during the Messinian: Toward constraining the dynamics of Mediterranean deoxygenation

Mancini,

Gennari,

Lozar

et al. 2024

Deep Sea Research Part I: Oceanographic Research Papers

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Multiple crises preceded the Mediterranean Salinity Crisis: Aridification and vegetation changes revealed by biomarkers and stable isotopes

Cited by 14 publications

References 66 publications

Coupled otolith and foraminifera oxygen and carbon stable isotopes evidence paleoceanographic changes and fish metabolic responses

Coupled otolith and foraminifera oxygen and carbon stable isotopes evidence paleoceanographic changes and fish metabolic responses

Toward an Astrochronology-Based Age-Model for a Messinian Pre-Evaporitic Succession: The Example of Torrente Vaccarizzo Section in Sicily (Italy)

Sensitivity of the thermohaline circulation during the Messinian: Toward constraining the dynamics of Mediterranean deoxygenation

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