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STORM-INDUCED COMMUNITY DYNAMICS IN THE FEZOUATA BIOTA (LOWER ORDOVICIAN, MOROCCO)

2018; Society for Sedimentary Geology; Volume: 33; Issue: 12 Linguagem: Inglês

10.2110/palo.2018.055

1938-5323

Farid Saleh, Yves Candela, David A. T. Harper, Marika Polechová, Bertrand Lefèbvre, Bernard Pittet,

Marine and coastal ecosystems

Research Article| December 21, 2018 STORM-INDUCED COMMUNITY DYNAMICS IN THE FEZOUATA BIOTA (LOWER ORDOVICIAN, MOROCCO) FARID SALEH; FARID SALEH 1Université Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS, UMR 5276 Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, F-69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar YVES CANDELA; YVES CANDELA 2Department of Natural Sciences, National Museums Scotland, Edinburgh EH1 1JF, UK Search for other works by this author on: GSW Google Scholar DAVID A. T. HARPER; DAVID A. T. HARPER 3Palaeoecosystems Group, Department of Earth Sciences, Durham University, Durham DH1 3LE, UK Search for other works by this author on: GSW Google Scholar MARIKA POLECHOVÁ; MARIKA POLECHOVÁ 4Czech Geological Survey; Klárov 3, Prague 1, 118 21, Czech Republic Search for other works by this author on: GSW Google Scholar BERTRAND LEFEBVRE; BERTRAND LEFEBVRE 1Université Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS, UMR 5276 Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, F-69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar BERNARD PITTET BERNARD PITTET 1Université Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS, UMR 5276 Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, F-69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar Author and Article Information FARID SALEH 1Université Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS, UMR 5276 Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, F-69622 Villeurbanne, France YVES CANDELA 2Department of Natural Sciences, National Museums Scotland, Edinburgh EH1 1JF, UK DAVID A. T. HARPER 3Palaeoecosystems Group, Department of Earth Sciences, Durham University, Durham DH1 3LE, UK MARIKA POLECHOVÁ 4Czech Geological Survey; Klárov 3, Prague 1, 118 21, Czech Republic BERTRAND LEFEBVRE 1Université Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS, UMR 5276 Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, F-69622 Villeurbanne, France BERNARD PITTET 1Université Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS, UMR 5276 Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, F-69622 Villeurbanne, France email: farid.saleh@univ-lyon1.fr Publisher: SEPM Society for Sedimentary Geology First Online: 21 Dec 2018 Online Issn: 1938-5323 Print Issn: 0883-1351 Copyright © 2018, SEPM (Society for Sedimentary Geology) PALAIOS (2018) 33 (12): 535–541. https://doi.org/10.2110/palo.2018.055 Article history First Online: 21 Dec 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation FARID SALEH, YVES CANDELA, DAVID A. T. HARPER, MARIKA POLECHOVÁ, BERTRAND LEFEBVRE, BERNARD PITTET; STORM-INDUCED COMMUNITY DYNAMICS IN THE FEZOUATA BIOTA (LOWER ORDOVICIAN, MOROCCO). PALAIOS 2018;; 33 (12): 535–541. doi: https://doi.org/10.2110/palo.2018.055 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyPALAIOS Search Advanced Search Abstract In the Central Anti-Atlas (Morocco), the lower part of the Fezouata Shale has yielded locally abundant remains of soft-bodied to lightly sclerotized taxa, occurring in low diversity assemblages characterized by strong spatial and taxonomic heterogeneities, and frequently, by the occurrence of small-sized individuals. Size frequency analyses of Celdobolus sp., Wosekella sp. (both linguliformean brachiopods) and Babinka prima (babinkid bivalve) collected in deposits of the Fezouata Shale and associated with distinct paleoenvironmental conditions show that short-lived communities of epifaunal and shallow infaunal taxa were regularly smothered and killed by distal storm deposits. Small-sized individuals more likely represent juveniles, rather than 'dwarfed' adults (Lilliput Effect). Consequently, unstable environmental conditions (regular storms, and possibly low oxygenation of the water column) probably explain the unusual community dynamics of late Tremadocian assemblages of the Fezouata Biota (high density of individuals, low α-diversity, and high γ-diversity), interpreted as short-lived, opportunistic populations. This process has wider implications for the understanding of occurrences of small individuals elsewhere in the fossil record. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.