The last glacial-interglacial transition and dinoflagellate cysts in the western Mediterranean Sea

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• 作者：Imene Rouis-Zargouni^a ; ^b ; ^{imenerouis@ymail.com} ; Jean-Louis Turon^b ; ^{Jl.turon@epoc.u-bordeaux.fr} ; Laurent Londeix^b ; ^{l.londeix@epoc.u-bordeaux.fr} ; Né ; jib Kallel^a ; ^{nejib.kallel@fss.rnu.tn} ; Latifa Essallami^a ; ^{ess_latifa@yahoo.fr}
• 关键词：Dinoflagellate cysts ; Younger Dryas ; Bö ; lling/Allerö ; d ; Western Mediterranean ; Nematosphaeropsis labyrinthus
• 刊名：Comptes Rendus Geoscience
• 出版年：2012
• 期刊代码：87_16310713
• 类别：ear
• 出版时间：February, 2012
• 卷：344
• 期：2
• 页码：99-109
• 文件大小：1228 K

摘要

Using the analysis of dinoflagellate cysts in three deep-sea sediments cores situated in the Sicilian-Tunisian Strait, in the Gulf of Lions and in the Alboran Sea, we reconstruct the paleoenvironmental changes that took place during the last glacial-interglacial transition in the western Mediterranean Sea. The development of the warm microflora Impagidinium聽aculeatum and especially Spiniferites聽mirabilis appears to be an important proxy for recognizing warm periods as the B枚lling/Aller枚d and the Early Holocene. Bitectatodinium聽tepikiense, Spiniferites聽elongatus and Nematosphaeropsis聽labyrinthus mark the end of the Heinrich event 1 and the Younger Dryas. This cold microfloral association confirms the drastic climate changes in the western Mediterranean Sea synchronous to the dry and cold climate which occurred in the South European margin. The dinocyst N.聽labyrinthus shows high percentages in all studied regions during the Younger Dryas. Its distribution reveals a significant increase from the South to the North of this basin during this cold brief event. Thus, we note that this species can be considered as a new eco-stratigraphical tracer of the Younger Dryas in the western Mediterranean Sea.