Mediterranean coccolith ecobiostratigraphy since the penultimate Glacial (the last 145,000 years) and ecobioevent traceability

Enrico Di Stefano, Alessandro Incarbona, Mattia Vallefuoco, Patrizia Sangiorgi, Francesca Budillon, Luca M. Foresi, Nicola Pelosi, Mario Sprovieri, Marina Iorio, Agata Di Stefano

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The Mediterranean Sea is a miniature ocean ideal to test the response of marine ecosystems to amplified orbital and suborbital climate changes. Here we present coccolith data from a Sardinia Channel gravity core (Arcose C_33) analysed over the last 145,000 years, with a mean resolution of about 900 years. The study highlights that regional phytoplankton assemblages underwent significant modifications between the penultimate glacial and the last interglacial, as well as between the last glacial and the Holocene. The N ratio palaeoproductivity index suggests reduced productivity levels and the development of a deep nutricline during the last interglacial and the Holocene. Within the last glacial period, many taxa exhibit abundance fluctuations that parallel oscillations in δ18O values of Globigerina bulloides tests. Heinrich events and stadials seem to be associated with drops in primary productivity levels, as already observed in the Alboran Sea and the Sicily Channel.A total of 19 ecobioevents were identified in the Sardinia Channel sediments, including abundance fluctuations of Emiliania huxleyi > 4 μm, Florisphaera profunda and Gephyrocapsa oceanica. The comparison of events across the Mediterranean Sea suggests that traceability applies to the Sicily Channel, Balearic and Tyrrhenian Seas, supporting the adoption of a common ecobiostratigraphic scheme. Less certain is the correlation with the Alboran Sea, although peaks of Helicosphaera carteri and Syracosphaera histrica during Heinrich events and stadials suggest similar nutrient dynamics in response to suborbital climatic variations in the Sicily Channel, southern Tyrrhenian and Alboran Seas. The traceability of events within eastern Mediterranean cores is strongly limited, possibly due to different physico-chemical properties and nutrient dynamics.
Original languageEnglish
Pages (from-to)24-38
Number of pages15
JournalMarine Micropaleontology
Volume115
Publication statusPublished - 2015

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coccolith
Heinrich event
Last Interglacial
nutrient dynamics
Last Glacial
Holocene
paleoproductivity
productivity
marine ecosystem
chemical property
oscillation
phytoplankton
gravity
climate change
sea
ocean
sediment

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Palaeontology

Cite this

Mediterranean coccolith ecobiostratigraphy since the penultimate Glacial (the last 145,000 years) and ecobioevent traceability. / Di Stefano, Enrico; Incarbona, Alessandro; Vallefuoco, Mattia; Sangiorgi, Patrizia; Budillon, Francesca; Foresi, Luca M.; Pelosi, Nicola; Sprovieri, Mario; Iorio, Marina; Di Stefano, Agata.

In: Marine Micropaleontology, Vol. 115, 2015, p. 24-38.

Research output: Contribution to journalArticle

Di Stefano, E, Incarbona, A, Vallefuoco, M, Sangiorgi, P, Budillon, F, Foresi, LM, Pelosi, N, Sprovieri, M, Iorio, M & Di Stefano, A 2015, 'Mediterranean coccolith ecobiostratigraphy since the penultimate Glacial (the last 145,000 years) and ecobioevent traceability', Marine Micropaleontology, vol. 115, pp. 24-38.
Di Stefano, Enrico ; Incarbona, Alessandro ; Vallefuoco, Mattia ; Sangiorgi, Patrizia ; Budillon, Francesca ; Foresi, Luca M. ; Pelosi, Nicola ; Sprovieri, Mario ; Iorio, Marina ; Di Stefano, Agata. / Mediterranean coccolith ecobiostratigraphy since the penultimate Glacial (the last 145,000 years) and ecobioevent traceability. In: Marine Micropaleontology. 2015 ; Vol. 115. pp. 24-38.
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T1 - Mediterranean coccolith ecobiostratigraphy since the penultimate Glacial (the last 145,000 years) and ecobioevent traceability

AU - Di Stefano, Enrico

AU - Incarbona, Alessandro

AU - Vallefuoco, Mattia

AU - Sangiorgi, Patrizia

AU - Budillon, Francesca

AU - Foresi, Luca M.

AU - Pelosi, Nicola

AU - Sprovieri, Mario

AU - Iorio, Marina

AU - Di Stefano, Agata

PY - 2015

Y1 - 2015

N2 - The Mediterranean Sea is a miniature ocean ideal to test the response of marine ecosystems to amplified orbital and suborbital climate changes. Here we present coccolith data from a Sardinia Channel gravity core (Arcose C_33) analysed over the last 145,000 years, with a mean resolution of about 900 years. The study highlights that regional phytoplankton assemblages underwent significant modifications between the penultimate glacial and the last interglacial, as well as between the last glacial and the Holocene. The N ratio palaeoproductivity index suggests reduced productivity levels and the development of a deep nutricline during the last interglacial and the Holocene. Within the last glacial period, many taxa exhibit abundance fluctuations that parallel oscillations in δ18O values of Globigerina bulloides tests. Heinrich events and stadials seem to be associated with drops in primary productivity levels, as already observed in the Alboran Sea and the Sicily Channel.A total of 19 ecobioevents were identified in the Sardinia Channel sediments, including abundance fluctuations of Emiliania huxleyi > 4 μm, Florisphaera profunda and Gephyrocapsa oceanica. The comparison of events across the Mediterranean Sea suggests that traceability applies to the Sicily Channel, Balearic and Tyrrhenian Seas, supporting the adoption of a common ecobiostratigraphic scheme. Less certain is the correlation with the Alboran Sea, although peaks of Helicosphaera carteri and Syracosphaera histrica during Heinrich events and stadials suggest similar nutrient dynamics in response to suborbital climatic variations in the Sicily Channel, southern Tyrrhenian and Alboran Seas. The traceability of events within eastern Mediterranean cores is strongly limited, possibly due to different physico-chemical properties and nutrient dynamics.

AB - The Mediterranean Sea is a miniature ocean ideal to test the response of marine ecosystems to amplified orbital and suborbital climate changes. Here we present coccolith data from a Sardinia Channel gravity core (Arcose C_33) analysed over the last 145,000 years, with a mean resolution of about 900 years. The study highlights that regional phytoplankton assemblages underwent significant modifications between the penultimate glacial and the last interglacial, as well as between the last glacial and the Holocene. The N ratio palaeoproductivity index suggests reduced productivity levels and the development of a deep nutricline during the last interglacial and the Holocene. Within the last glacial period, many taxa exhibit abundance fluctuations that parallel oscillations in δ18O values of Globigerina bulloides tests. Heinrich events and stadials seem to be associated with drops in primary productivity levels, as already observed in the Alboran Sea and the Sicily Channel.A total of 19 ecobioevents were identified in the Sardinia Channel sediments, including abundance fluctuations of Emiliania huxleyi > 4 μm, Florisphaera profunda and Gephyrocapsa oceanica. The comparison of events across the Mediterranean Sea suggests that traceability applies to the Sicily Channel, Balearic and Tyrrhenian Seas, supporting the adoption of a common ecobiostratigraphic scheme. Less certain is the correlation with the Alboran Sea, although peaks of Helicosphaera carteri and Syracosphaera histrica during Heinrich events and stadials suggest similar nutrient dynamics in response to suborbital climatic variations in the Sicily Channel, southern Tyrrhenian and Alboran Seas. The traceability of events within eastern Mediterranean cores is strongly limited, possibly due to different physico-chemical properties and nutrient dynamics.

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M3 - Article

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EP - 38

JO - Marine Micropaleontology

JF - Marine Micropaleontology

SN - 0377-8398

ER -