Title :

Organism motility in an oxygenated shallow-marine environment 2.1 billion years ago

Author(s) :

El Albani, Abderrazak [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Mangano, M. Gabriela [Auteur]
University of Saskatchewan [Saskatoon] [U of S]
Buatois, Luis [Auteur]
University of Saskatchewan [Saskatoon] [U of S]
Bengtson, Stefan [Auteur]
Swedish Museum of Natural History [NRM]
Riboulleau, Armelle [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Bekker, Andrey [Auteur]
University of California [Riverside] [UC Riverside]
Konhauser, Kurt [Auteur]
Lyons, Timothy [Auteur]
University of California [Riverside] [UC Riverside]
Rollion-Bard, Claire [Auteur]
Institut de Physique du Globe de Paris [IPGP]
Bankole, Olabode [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Meunier, Alain [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Trentesaux, Alain [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Mazurier, Arnaud [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Aubineau, Jérémie [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Laforest, Claude [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Fontaine, Claude [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Recourt, Philippe [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Chi Fru, Ernest [Auteur]
Cardiff University
Macchiarelli, Roberto [Auteur]
Laboratoire de paléontologie, évolution, paléoécosystèmes, paléoprimatologie [PALEVOPRIM ]
Histoire naturelle de l'Homme préhistorique [HNHP]
Lekele Baghekema, Stellina Gwenaëlle [Auteur]
Institut de Chimie des Milieux et Matériaux de Poitiers [IC2MP]
Reynaud, Jean Yves [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Gauthier-Lafaye, François [Auteur]
Laboratoire d'Hydrologie et de Géochimie de Strasbourg [LHyGeS]
Canfield, Donald [Auteur]

Journal title :

Proceedings of the National Academy of Sciences of the United States of America

Pages :

3431-3436

Publisher :

National Academy of Sciences

Publication date :

2019-02-26

ISSN :

0027-8424

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Paléontologie
Planète et Univers [physics]/Sciences de la Terre

English abstract : [en]

Evidence for macroscopic life in the Paleoproterozoic Era comes from1.8 billion-year-old (Ga) compression fossils [Han TM, RunnegarB (1992) Science 257:232–235; Knoll et al. (2006) Philos Trans R Soc Lond B 361:1023–1038], ...
Show more >Evidence for macroscopic life in the Paleoproterozoic Era comes from1.8 billion-year-old (Ga) compression fossils [Han TM, RunnegarB (1992) Science 257:232–235; Knoll et al. (2006) Philos Trans R Soc Lond B 361:1023–1038], Stirling biota [Bengtson S et al. (2007) Paleobiology 33:351–381], and large colonial organisms exhibiting signs of coordinated growth from the 2.1-Ga Francevillian series, Gabon. Here we report on pyritized string-shaped structures from the Francevillian Basin. Combined microscopic, microtomographic, geochemical, and sedimentologic analyses provide evidence for biogenicity, and syngenicity and suggest that the structures underwent fossilization during early diagenesis close to the sediment–water interface. The string-shaped structures are up to 6 mm across and extend up to 170 mm through the strata. Morphological and 3D tomographic reconstructions suggest that the producer may have been a multicellular or syncytial organism able to migrate laterally and vertically to reach food resources. A possible modern analog is the aggregation of amoeboid cells into a migratory slug phase in cellular slime molds at times of starvation. This unique ecologic window established in an oxygenated, shallow-marine environment represents an exceptional record of the biosphere following the crucial changes that occurred in the atmosphere and ocean in the aftermath of the great oxidation event (GOE).Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL