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Decoupling of body-plan diversification and ecological structuring during the Ediacaran-Cambrian transition: evolutionary and geobiological feedbacks.
Proc Biol Sci. 2014 Apr 07; 281(1780):20140038.PB

Abstract

The rapid appearance of bilaterian clades at the beginning of the Phanerozoic is one of the most intriguing topics in macroevolution. However, the complex feedbacks between diversification and ecological interactions are still poorly understood. Here, we show that a systematic and comprehensive analysis of the trace-fossil record of the Ediacaran-Cambrian transition indicates that body-plan diversification and ecological structuring were decoupled. The appearance of a wide repertoire of behavioural strategies and body plans occurred by the Fortunian. However, a major shift in benthic ecological structure, recording the establishment of a suspension-feeder infauna, increased complexity of the trophic web, and coupling of benthos and plankton took place during Cambrian Stage 2. Both phases were accompanied by different styles of ecosystem engineering, but only the second one resulted in the establishment of the Phanerozoic-style ecology. In turn, the suspension-feeding infauna may have been the ecological drivers of a further diversification of deposit-feeding strategies by Cambrian Stage 3, favouring an ecological spillover scenario. Trace-fossil information strongly supports the Cambrian explosion, but allows for a short time of phylogenetic fuse during the terminal Ediacaran-Fortunian.

Authors+Show Affiliations

Department of Geological Sciences, University of Saskatchewan, , Saskatoon, Saskatchewan, Canada , SK S7N 5E2.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24523279

Citation

Mángano, M Gabriela, and Luis A. Buatois. "Decoupling of Body-plan Diversification and Ecological Structuring During the Ediacaran-Cambrian Transition: Evolutionary and Geobiological Feedbacks." Proceedings. Biological Sciences, vol. 281, no. 1780, 2014, p. 20140038.
Mángano MG, Buatois LA. Decoupling of body-plan diversification and ecological structuring during the Ediacaran-Cambrian transition: evolutionary and geobiological feedbacks. Proc Biol Sci. 2014;281(1780):20140038.
Mángano, M. G., & Buatois, L. A. (2014). Decoupling of body-plan diversification and ecological structuring during the Ediacaran-Cambrian transition: evolutionary and geobiological feedbacks. Proceedings. Biological Sciences, 281(1780), 20140038. https://doi.org/10.1098/rspb.2014.0038
Mángano MG, Buatois LA. Decoupling of Body-plan Diversification and Ecological Structuring During the Ediacaran-Cambrian Transition: Evolutionary and Geobiological Feedbacks. Proc Biol Sci. 2014 Apr 7;281(1780):20140038. PubMed PMID: 24523279.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Decoupling of body-plan diversification and ecological structuring during the Ediacaran-Cambrian transition: evolutionary and geobiological feedbacks. AU - Mángano,M Gabriela, AU - Buatois,Luis A, Y1 - 2014/02/12/ PY - 2014/2/14/entrez PY - 2014/2/14/pubmed PY - 2014/11/8/medline KW - Cambrian explosion KW - Ediacaran–Cambrian KW - agronomic revolution KW - ecosystem engineering KW - trace fossils SP - 20140038 EP - 20140038 JF - Proceedings. Biological sciences JO - Proc Biol Sci VL - 281 IS - 1780 N2 - The rapid appearance of bilaterian clades at the beginning of the Phanerozoic is one of the most intriguing topics in macroevolution. However, the complex feedbacks between diversification and ecological interactions are still poorly understood. Here, we show that a systematic and comprehensive analysis of the trace-fossil record of the Ediacaran-Cambrian transition indicates that body-plan diversification and ecological structuring were decoupled. The appearance of a wide repertoire of behavioural strategies and body plans occurred by the Fortunian. However, a major shift in benthic ecological structure, recording the establishment of a suspension-feeder infauna, increased complexity of the trophic web, and coupling of benthos and plankton took place during Cambrian Stage 2. Both phases were accompanied by different styles of ecosystem engineering, but only the second one resulted in the establishment of the Phanerozoic-style ecology. In turn, the suspension-feeding infauna may have been the ecological drivers of a further diversification of deposit-feeding strategies by Cambrian Stage 3, favouring an ecological spillover scenario. Trace-fossil information strongly supports the Cambrian explosion, but allows for a short time of phylogenetic fuse during the terminal Ediacaran-Fortunian. SN - 1471-2954 UR - https://www.unboundmedicine.com/medline/citation/24523279/Decoupling_of_body_plan_diversification_and_ecological_structuring_during_the_Ediacaran_Cambrian_transition:_evolutionary_and_geobiological_feedbacks_ L2 - https://royalsocietypublishing.org/doi/10.1098/rspb.2014.0038?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -