Author:
Meek Dean M.,Buatois Luis A.,Mángano M. Gabriela,Eglington Bruce M.
Abstract
AbstractThe Agronomic Revolution of the early Cambrian refers to the most significant re-structuration of the benthic marine ecosystem in life history. Using a global compilation of trace-fossil records across the Ediacaran-Cambrian transition, this paper investigates the relationship between the benthos and depositional environments prior to, during, and after the Agronomic Revolution to shed light on habitat segregation via correspondence analysis. The results of this analysis characterize Ediacaran mobile benthic bilaterians as facies-crossing and opportunistic, with low levels of habitat specialization. In contrast, the Terreneuvian and Cambrian Series 2 reveal progressive habitat segregation, parallel to matground environmental restriction. This event was conducive to the establishment of distinct endobenthic communities along the marine depositional profile, showing that the increase in styles of animal-substrate interactions was expressed by both alpha and beta ichnodiversity. Habitat segregation at the dawn of the Phanerozoic may illustrate an early extension of the trophic group amensalism at community scale.
Funder
Natural Sciences and Engineering Research Council of Canada
Publisher
Springer Science and Business Media LLC
Reference82 articles.
1. Seilacher, A. & Pflüger, F. From biomats to benthic agriculture: A biohistoric revolution. in Biostabilization of Sediments (eds. Krumbein, W. E., Paterson, D. M. & Stal, L. J.) 97–105 (Bibliotheks und Informationssystem der Carl von Ossietzky Universität Oldenburg, 1994).
2. Seilacher, A. Biomat-related lifestyles in the Precambrian. Palaios 14, 86–93 (1999).
3. Mángano, M. G. & Buatois, L. A. Decoupling of body-plan diversification and ecological structuring during the Ediacaran-Cambrian transition: Evolutionary and geobiological feedbacks. Proc. R. Soc. B Biol. Sci. 281, 1–9 (2014).
4. Mángano, M. G. & Buatois, L. A. The Cambrian revolutions: Trace-fossil record, timing, links and geobiological impact. Earth-Sci. Rev. 173, 96–108 (2017).
5. Buatois, L. A., Narbonne, G. M., Mángano, M. G., Carmona, N. B. & Myrow, P. Ediacaran matground ecology persisted into the earliest Cambrian. Nat. Commun. 5, 3544 (2014).