The Ordovician Biodiversification: revolution in the oceanic trophic chain

Journal article
(Original article)

Publication Details

Author(s): Servais T, Lehnert O, Li J, Mullins GL, Munnecke A, Nützel A, Vecoli M
Journal: Lethaia
Publisher: Wiley-Blackwell
Publication year: 2008
Volume: 41
Pages range: 99-109
ISSN: 0024-1164
Language: English


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 δ13C 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. © 2008 The Authors, Journal compilation © 2008 The Lethaia Foundation.

FAU Authors / FAU Editors

Lehnert, Oliver PD Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)
Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)

External institutions with authors

LILLE 1 University - Science and Technology
Ludwig-Maximilians-Universität (LMU)
Northwestern Polytechnical University / 西北工业大学 (NPU/NWPU)
University of Leicester

Research Fields

Climate and Resources
Research focus area of a faculty: Naturwissenschaftliche Fakultät

How to cite

Servais, T., Lehnert, O., Li, J., Mullins, G.L., Munnecke, A., Nützel, A., & Vecoli, M. (2008). The Ordovician Biodiversification: revolution in the oceanic trophic chain. Lethaia, 41, 99-109.

Servais, Thomas, et al. "The Ordovician Biodiversification: revolution in the oceanic trophic chain." Lethaia 41 (2008): 99-109.


Last updated on 2018-14-12 at 09:22