globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.12.021
论文题名:
A new proxy for Cretaceous paleoceanographic and paleoclimatic reconstructions: Coiling direction changes in the planktonic foraminifera Muricohedbergella delrioensis
作者: Desmares D.; Crognier N.; Bardin J.; Testé M.; Beaudoin B.; Grosheny D.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 445
起始页码: 8
结束页码: 17
语种: 英语
英文关键词: Coiling direction ; Oceanic Anoxic Event 2 ; Planktonic foraminifera ; Sea surface temperature ; Western Interior Seaway
英文摘要: Among some modern and recent fossil species of planktonic foraminifera, the proportion of left- to right-coiled shells in a population appears to be temperature-dependent; the relative abundance of each morphotype reflecting ecological preferences. A similar relationship is identified among Muricohedbergella delrioensis (Carsey, 1926) at the Cenomanian-Turonian stage boundary in mid-latitude sites of the Western Interior Seaway, including the Pueblo type section. The increase of sinistral M. delrioensis in the assemblage is related to higher δ18O carb values and decrease in inner porosity which suggests that changes in the coiling direction in this morphospecies could represent a new proxy for constraining Sea Surface Temperature (SST) variations. As surface dwellers, muricohedbergellids were not affected by Oceanic Anoxic Event (OAE2) and provide a continuous paleoclimatic signal throughout the Cenomanian-Turonian boundary interval. Furthermore, genetic evidence obtained from extant foraminifera indicates that shifts of coiling ratios in planktonic foraminifera species can express the signature of distinct genetic types, which are revealed through their opposite coiling directions. Coiling direction could be a genetic trait, implying that cryptic species may occur in the Mesozoic. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68573
Appears in Collections:过去全球变化的重建

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作者单位: Sorbonne Universités, UPMC Univ Paris 06, UMR 7207 (CR2P), MNHN - UPMC - CNRS, Tour 46-56, 5, case 104, 4, place Jussieu, Paris, France; UMR5150 (LFCR), CNRS-UPPA-TOTAL, Université de Pau et des Pays de l'Adour, BP 1155, Pau Cedex, France; Mines-ParisTech, 60 boulevard Saint Michel, Paris, France; UMR7359 GéoRessources, Université de Lorraine, boulevard des Aiguillettes, Vandoeuvre-lès-Nancy, France

Recommended Citation:
Desmares D.,Crognier N.,Bardin J.,et al. A new proxy for Cretaceous paleoceanographic and paleoclimatic reconstructions: Coiling direction changes in the planktonic foraminifera Muricohedbergella delrioensis[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,445
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