Fossil mega- and micro-flora from Bernasso (Early Pleistocene, southern France): A multimethod comparative approach for paleoclimatic reconstruction

Autor: A Paya, Ahmed-Adam Ali, Laure Paradis, Akhter Ahmed, Vincent Girard, Séverine Fauquette, Suzanne A.G. Leroy, Jean-Pierre Suc, Paul Roiron, Benjamin Adroit
Přispěvatelé: Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology (NIGPAS-CAS), Chinese Academy of Sciences [Nanjing Branch]-Chinese Academy of Sciences [Nanjing Branch], Institut des Sciences de la Terre de Paris (iSTeP), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire méditerranéen de préhistoire Europe-Afrique (LAMPEA), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC), Université de Montpellier (UM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, PaleoEnvironnements et PaleobioSphere (PEPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institute for the Environment [Uxbridge], Brunel University London [Uxbridge], Seismological and Volcanological Observatory Center, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2019
Předmět:
0106 biological sciences
Mediterranean climate
010506 paleontology
Early Pleistocene
Pleistocene
[SDE.MCG]Environmental Sciences/Global Changes
[SDV]Life Sciences [q-bio]
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
relative humidity
medicine.disease_cause
010603 evolutionary biology
01 natural sciences
flora
vegetation
Pollen
Paleoclimatology
medicine
Glacial period
microorganisms
climate
ComputingMilieux_MISCELLANEOUS
Ecology
Evolution
Behavior and Systematics
0105 earth and related environmental sciences
ecosystem
paleoclimatology
temperature
Paleontology
Vegetation
15. Life on land
s pollen
[SDU]Sciences of the Universe [physics]
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
13. Climate action
[SDE]Environmental Sciences
Interglacial
leaves
Physical geography
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
fossils
Geology
Zdroj: Review of Palaeobotany and Palynology
Review of Palaeobotany and Palynology, Elsevier, In press
Review of Palaeobotany and Palynology, Elsevier, 2019, 267, pp.54-61. ⟨10.1016/j.revpalbo.2019.05.002⟩
Review of Palaeobotany and Palynology, 2019, 267, pp.54-61. ⟨10.1016/j.revpalbo.2019.05.002⟩
ISSN: 0034-6667
DOI: 10.1016/j.revpalbo.2019.05.002
Popis: International audience; Bernasso is an Early Pleistocene locality that has a well-dated floral fossil content including both pollen grains and megaremains. Pollen record shows vegetation changes corresponding to two glacial and one interglacial periods. The megafloral fossil assemblage was interpreted as an association of present-day Mediterranean and Caucasian taxa that developed during a late interglacial stage of the beginning of the Pleistocene. In the present study, climatic reconstruction using the Climate Leaf Analysis Multivariate Program (CLAMP) and the Leaf Margin Analysis (LMA) methods based on the megaflora on one hand and using the Climatic Amplitude Method (CAM) based on the pollen flora on the other hand have been used to check the qualitative climatic estimates based on the comparison between paleovegetation data and similar modern ecosystems. CLAMP and LMA analyses show that the Bernasso climate was colder than the present-day climate of Southern France and of the Hyrcanian and Euxinian regions. On contrary, CAM shows mean annual temperatures higher than the modern Bernasso temperature and equivalent to the temperature of the Hyrcanian and Euxinian regions. Mean annual precipitation and relative humidity reconstructed by CLAMP and CAM are in agreement and indicate that the climate was wetter than today at Bernasso. The differences between the three methods highlight important methodological biases that could be solved by including additional calibration sites in Europe and in the Mediterranean region.
Databáze: OpenAIRE
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