Calcareous nannofossil surface sediment assemblages from the Sicily Channel (central Mediterranean Sea): Palaeoceanographic implications.

Enrico Di Stefano, Paolo Censi, Giorgio Tranchida, Alessandro Incarbona, Federica Placenti, Sergio Bonomo, Gualtiero Basilone, Bernardo Patti, Angela Cuttitta, Salvatore Mazzola, Angelo Bonanno, Giuseppa Buscaino, Francesco Placenti, Bahri, Essarbout, Massa, Salem W. Zgozi, Tranchida, Talha

Risultato della ricerca: Article

22 Citazioni (Scopus)

Abstract

Quantitative analysis of 67 calcareous nannofossil assemblages from surface sediments recovered in a wide area across the Sicily Channel has been carried out in order to improve the interpretation of palaeontological data based on this planktonic group in a key area for Mediterranean palaeoceanographic studies. The investigation focused on three case studies that demonstrate the high potentiality of such a combined approach, taking into account the recent distribution of taxa or groups of taxa on the sea floor and the palaeontological record. The distribution of reworked specimens over the northern Sicily Channel sea floor validates the role of southern Sicily as a source region for reworked nannofossils and the role of rivers as their carrier. Eustatic sea-level fluctuations can be considered to be the main factor that influenced the abundance variations in sedimentary sequences of this area. The distribution of Florisphaera profunda can be explained in terms of topography (positive correlation) and mesoscale oceanographic circulation. In particular, its significant anti-correlation to the amount of chlorophyll-A deduced by satellite imagery validates the use of this species as a proxy for palaeoproductivity reconstructions. Finally, high abundance values of G. oceanica are confined to thewesternmost part of the Sicily Channel, coinciding with a water mass salinity minimum. In particular, abundances of up to about 10% were observed in the westernmost part of the African Margin, suggesting the importance of the Atlantic Tunisian Current, whose activity is more pronounced in winter. The comparison of data of this species between 135 and 110 kyr BP, inside and outside the Channel, led us to deduce that the physical transport in almost unmodified waters of Atlantic origin might be the most important factor for its significant occurrence.
Lingua originaleEnglish
pagine (da-a)297-309
Numero di pagine13
RivistaMarine Micropaleontology
Volume67
Stato di pubblicazionePublished - 2008

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nanofossil
sediment
seafloor
paleoproductivity
sedimentary sequence
satellite imagery
quantitative analysis
water mass
chlorophyll
topography
sea level
salinity
Mediterranean Sea
winter
river
distribution
water

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Palaeontology

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Calcareous nannofossil surface sediment assemblages from the Sicily Channel (central Mediterranean Sea): Palaeoceanographic implications. / Di Stefano, Enrico; Censi, Paolo; Tranchida, Giorgio; Incarbona, Alessandro; Placenti, Federica; Bonomo, Sergio; Basilone, Gualtiero; Patti, Bernardo; Cuttitta, Angela; Mazzola, Salvatore; Bonanno, Angelo; Buscaino, Giuseppa; Placenti, Francesco; Bahri; Essarbout; Massa; Zgozi, Salem W.; Tranchida; Talha.

In: Marine Micropaleontology, Vol. 67, 2008, pag. 297-309.

Risultato della ricerca: Article

Di Stefano, E, Censi, P, Tranchida, G, Incarbona, A, Placenti, F, Bonomo, S, Basilone, G, Patti, B, Cuttitta, A, Mazzola, S, Bonanno, A, Buscaino, G, Placenti, F, Bahri, Essarbout, Massa, Zgozi, SW, Tranchida & Talha 2008, 'Calcareous nannofossil surface sediment assemblages from the Sicily Channel (central Mediterranean Sea): Palaeoceanographic implications.', Marine Micropaleontology, vol. 67, pagg. 297-309.
Di Stefano, Enrico ; Censi, Paolo ; Tranchida, Giorgio ; Incarbona, Alessandro ; Placenti, Federica ; Bonomo, Sergio ; Basilone, Gualtiero ; Patti, Bernardo ; Cuttitta, Angela ; Mazzola, Salvatore ; Bonanno, Angelo ; Buscaino, Giuseppa ; Placenti, Francesco ; Bahri ; Essarbout ; Massa ; Zgozi, Salem W. ; Tranchida ; Talha. / Calcareous nannofossil surface sediment assemblages from the Sicily Channel (central Mediterranean Sea): Palaeoceanographic implications. In: Marine Micropaleontology. 2008 ; Vol. 67. pagg. 297-309.
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title = "Calcareous nannofossil surface sediment assemblages from the Sicily Channel (central Mediterranean Sea): Palaeoceanographic implications.",
abstract = "Quantitative analysis of 67 calcareous nannofossil assemblages from surface sediments recovered in a wide area across the Sicily Channel has been carried out in order to improve the interpretation of palaeontological data based on this planktonic group in a key area for Mediterranean palaeoceanographic studies. The investigation focused on three case studies that demonstrate the high potentiality of such a combined approach, taking into account the recent distribution of taxa or groups of taxa on the sea floor and the palaeontological record. The distribution of reworked specimens over the northern Sicily Channel sea floor validates the role of southern Sicily as a source region for reworked nannofossils and the role of rivers as their carrier. Eustatic sea-level fluctuations can be considered to be the main factor that influenced the abundance variations in sedimentary sequences of this area. The distribution of Florisphaera profunda can be explained in terms of topography (positive correlation) and mesoscale oceanographic circulation. In particular, its significant anti-correlation to the amount of chlorophyll-A deduced by satellite imagery validates the use of this species as a proxy for palaeoproductivity reconstructions. Finally, high abundance values of G. oceanica are confined to thewesternmost part of the Sicily Channel, coinciding with a water mass salinity minimum. In particular, abundances of up to about 10{\%} were observed in the westernmost part of the African Margin, suggesting the importance of the Atlantic Tunisian Current, whose activity is more pronounced in winter. The comparison of data of this species between 135 and 110 kyr BP, inside and outside the Channel, led us to deduce that the physical transport in almost unmodified waters of Atlantic origin might be the most important factor for its significant occurrence.",
author = "{Di Stefano}, Enrico and Paolo Censi and Giorgio Tranchida and Alessandro Incarbona and Federica Placenti and Sergio Bonomo and Gualtiero Basilone and Bernardo Patti and Angela Cuttitta and Salvatore Mazzola and Angelo Bonanno and Giuseppa Buscaino and Francesco Placenti and Bahri and Essarbout and Massa and Zgozi, {Salem W.} and Tranchida and Talha",
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T1 - Calcareous nannofossil surface sediment assemblages from the Sicily Channel (central Mediterranean Sea): Palaeoceanographic implications.

AU - Di Stefano, Enrico

AU - Censi, Paolo

AU - Tranchida, Giorgio

AU - Incarbona, Alessandro

AU - Placenti, Federica

AU - Bonomo, Sergio

AU - Basilone, Gualtiero

AU - Patti, Bernardo

AU - Cuttitta, Angela

AU - Mazzola, Salvatore

AU - Bonanno, Angelo

AU - Buscaino, Giuseppa

AU - Placenti, Francesco

AU - Bahri, null

AU - Essarbout, null

AU - Massa, null

AU - Zgozi, Salem W.

AU - Tranchida, null

AU - Talha, null

PY - 2008

Y1 - 2008

N2 - Quantitative analysis of 67 calcareous nannofossil assemblages from surface sediments recovered in a wide area across the Sicily Channel has been carried out in order to improve the interpretation of palaeontological data based on this planktonic group in a key area for Mediterranean palaeoceanographic studies. The investigation focused on three case studies that demonstrate the high potentiality of such a combined approach, taking into account the recent distribution of taxa or groups of taxa on the sea floor and the palaeontological record. The distribution of reworked specimens over the northern Sicily Channel sea floor validates the role of southern Sicily as a source region for reworked nannofossils and the role of rivers as their carrier. Eustatic sea-level fluctuations can be considered to be the main factor that influenced the abundance variations in sedimentary sequences of this area. The distribution of Florisphaera profunda can be explained in terms of topography (positive correlation) and mesoscale oceanographic circulation. In particular, its significant anti-correlation to the amount of chlorophyll-A deduced by satellite imagery validates the use of this species as a proxy for palaeoproductivity reconstructions. Finally, high abundance values of G. oceanica are confined to thewesternmost part of the Sicily Channel, coinciding with a water mass salinity minimum. In particular, abundances of up to about 10% were observed in the westernmost part of the African Margin, suggesting the importance of the Atlantic Tunisian Current, whose activity is more pronounced in winter. The comparison of data of this species between 135 and 110 kyr BP, inside and outside the Channel, led us to deduce that the physical transport in almost unmodified waters of Atlantic origin might be the most important factor for its significant occurrence.

AB - Quantitative analysis of 67 calcareous nannofossil assemblages from surface sediments recovered in a wide area across the Sicily Channel has been carried out in order to improve the interpretation of palaeontological data based on this planktonic group in a key area for Mediterranean palaeoceanographic studies. The investigation focused on three case studies that demonstrate the high potentiality of such a combined approach, taking into account the recent distribution of taxa or groups of taxa on the sea floor and the palaeontological record. The distribution of reworked specimens over the northern Sicily Channel sea floor validates the role of southern Sicily as a source region for reworked nannofossils and the role of rivers as their carrier. Eustatic sea-level fluctuations can be considered to be the main factor that influenced the abundance variations in sedimentary sequences of this area. The distribution of Florisphaera profunda can be explained in terms of topography (positive correlation) and mesoscale oceanographic circulation. In particular, its significant anti-correlation to the amount of chlorophyll-A deduced by satellite imagery validates the use of this species as a proxy for palaeoproductivity reconstructions. Finally, high abundance values of G. oceanica are confined to thewesternmost part of the Sicily Channel, coinciding with a water mass salinity minimum. In particular, abundances of up to about 10% were observed in the westernmost part of the African Margin, suggesting the importance of the Atlantic Tunisian Current, whose activity is more pronounced in winter. The comparison of data of this species between 135 and 110 kyr BP, inside and outside the Channel, led us to deduce that the physical transport in almost unmodified waters of Atlantic origin might be the most important factor for its significant occurrence.

UR - http://hdl.handle.net/10447/41808

UR - https://www.sciencedirect.com/science/article/pii/S0377839808000479?via%3Dihub

M3 - Article

VL - 67

SP - 297

EP - 309

JO - Marine Micropaleontology

JF - Marine Micropaleontology

SN - 0377-8398

ER -