http://www.cnr.it/ontology/cnr/individuo/prodotto/ID49008

Phytoplankton dynamics in the eastern Mediterranean sea during Marine isotopic stage 5e. (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Phytoplankton dynamics in the eastern Mediterranean sea during Marine isotopic stage 5e. (Articolo in rivista) (literal)

Anno

2006-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.palaeo.2005.09.022 (literal)

Alternative label

Giunta S. (a); Negri A. (a); Maffioli P. (b);, Sangiorgi F. (c); Capotondi L. (d); Morigi C. (a); Principato M.S. (b); Corselli C. (b) (2006)
Phytoplankton dynamics in the eastern Mediterranean sea during Marine isotopic stage 5e.
in Palaeogeography, palaeoclimatology, palaeoecology; ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Giunta S. (a); Negri A. (a); Maffioli P. (b);, Sangiorgi F. (c); Capotondi L. (d); Morigi C. (a); Principato M.S. (b); Corselli C. (b) (literal)

Pagina inizio

28 (literal)

Pagina fine

47 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

doi:10.1016/j.palaeo.2005.09.022 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

235 (literal)

Rivista

Palaeogeography, palaeoclimatology, palaeoecology (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

1-3 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

(a) Università Politecnica delle Marche, Dipartimento Scienze del Mare, via Brecce Bianche, I-60131, Ancona, Italy (b) Università degli Studi di Milano Bicocca, Dipartimento di Scienze Geologiche e Geotecnologie, Piazza della Scienza 4, 20126, Milano, Italy (c) Università degli Studi di Bologna, Centro Interdip. di Ricerca per le Scienze Ambientali, via S. Alberto 163, 48100 Ravenna, Italy (d) ISMAR Istituto di Scienze Marine C.N.R., via Gobetti 101, 40129, Bologna, Italy (literal)

Titolo

Phytoplankton dynamics in the eastern Mediterranean sea during Marine isotopic stage 5e. (literal)

Abstract

Calcareous nannoplankton, diatoms and organic-walled dinoflagellate cysts from seven eastern Mediterranean sediment cores were investigated to clarify the climatic and paleoceanographic conditions that influenced the deposition of sapropel S5 during Marine Isotopic Stage 5e. Warming of surface waters during S5 deposition is indicated by the high abundance of the calcareous nannofossil \"small\" Gephyrocapsa group, the presence of the dinoflagellate species Spiniferites mirabilis, Spiniferites pachydermus, Lingulodinium machaerophorum and Polysphaeridium zoharyi, and the tropical-subtropical diatom Pseudosolenia calearavis, Chaetoceros resting spores, Rhizosolenids and Thalassionema group. Increased productivity accompanied S5 deposition as evidenced by a general decrease in abundance of calcareous nannofossil superficial species and a coeval increase of dinocysts and diatoms. The productivity increase is further supported by an increase of the deep dwelling calcareous nannofossil species Florisphaera profunda. Stratification of near-surface waters is recorded by the presence of the dinocyst species L. machaerophorum and P zoharyi together with the co-occurrence of the diatom Chaetoceros resting-spore group, Thalassionema frauenfieldii, and Thalassionema nitzschioides var. parva, which reflect transport of neritic waters off-shore, and by the presence of some freshwater and transport-related diatom taxa (Cyclotella, Diatomella and Diploneis). Gradual shoaling of the nutricline and a gradual weakening of water stratification at the end of S5 deposition is indicated by an increase in the deep dwelling calcareous nannoplankton species Gladiolithus flabellatus, which suggests a less-deep niche compared to the deeper dwelling F profunda. Time transgressive variations in the distribution of the calcareous nannofossil Emiliana huxleyi and changes in the abundances of Gephyrocapsa oceanica, small Gephyrocapsa, G. flabellatus, and of the dinocysts R zoharyi and L. machaerophorum lead to paleocirculation considerations, as they always reflect the main current path. Moreover, the occurrence of upwelling-related diatom and dinocyst taxa, such as Chaetoceros resting spores and S. pachydermus, suggests the presence of a former gyre structure south of Crete that was active during S5 time. (c) 2005 Elsevier B.V. All rights reserved. Accession Number: WOS:000238018900003 (literal)

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