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The Ordovician Biodiversification: revolution in the oceanic trophic chain
Servais, Thomas1; Lehnert, Oliver2; Li, Jun (李军)3; Mullins, Gary L.4; Munnecke, Axel5; Nuetzel, Alexander6; Vecoli, Marco1
Source PublicationLETHAIA

The Early Palaeozoic phytoplankton (acritarch) radiation paralleled a long-term increase in sea level between the Early Cambrian and the Late Ordovician. In the Late Cambrian, after the SPICE delta C-13(carb) excursion, acritarchs underwent a major change in morphological disparity and their taxonomical diversity increased to reach highest values during the Middle Ordovician (Darriwilian). This highest phytoplankton diversity of the Palaeozoic was possibly the result of palaeogeography (greatest continental dispersal) and major orogenic and volcanic activity, which provided maximum ecospace and large amounts of nutrients. With its warm climate and high atmospheric CO2 levels, the Ordovician was similar to the Cretaceous: a period when phytoplankton diversity was at its maximum during the Mesozoic. With increased phytoplankton availability in the Late Cambrian and Ordovician a radiation of zooplanktonic organisms took place at the same time as a major diversification of suspension feeders. In addition, planktotrophy originated in invertebrate larvae during the Late Cambrian-Early Ordovician. These important changes in the trophic chain can be considered as a major palaeoecological revolution (part of the rise of the Palaeozoic Evolutionary Fauna of Sepkoski). There is now sufficient evidence that this trophic chain revolution was related to the diversification of the phytoplankton, of which the organic-walled fraction is partly preserved.

KeywordAcritarchs Evolutionary Radiation Ordovician Palaeoecology Phytoplankton Trophic Chain
WOS KeywordCarbon-isotope Excursion ; Organic-walled Microphytoplankton ; Early Mollusks ; Acritarch Distribution ; Taxonomic Diversity ; Cambrian Mollusks ; Marine Life ; Sea-level ; Planktotrophy ; Gotland
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000255835400002
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Document Type期刊论文
Corresponding AuthorServais, Thomas
Affiliation1.Univ Sci & Technol Lille, CNRS, Lab Paleontol & Paleog Paleozo, SN5 Cite Sci,UMR 8157, F-59655 Villeneuve Dascq, France
2.Univ Erlangen Nurnberg, Inst Geol & Mineral, D-91054 Erlangen, Germany
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
4.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
5.Univ Erlangen Nurnberg, Fachgrp Palaoumwelt, GeoZentrum Nordbayern, D-91054 Erlangen, Germany
6.Bayer Staatssammlung Palaontol & Geol, D-80333 Munich, Germany
Recommended Citation
GB/T 7714
Servais, Thomas,Lehnert, Oliver,Li, Jun ,et al. The Ordovician Biodiversification: revolution in the oceanic trophic chain[J]. LETHAIA,2008,41(2):99-109.
APA Servais, Thomas.,Lehnert, Oliver.,Li, Jun .,Mullins, Gary L..,Munnecke, Axel.,...&Vecoli, Marco.(2008).The Ordovician Biodiversification: revolution in the oceanic trophic chain.LETHAIA,41(2),99-109.
MLA Servais, Thomas,et al."The Ordovician Biodiversification: revolution in the oceanic trophic chain".LETHAIA 41.2(2008):99-109.
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