Early Cambrian origin of the shelf sediment mixed layer

Nature Communications
Romain C GougeonBrittany A Laing

Abstract

The mixed layer of modern oceans is a zone of fully homogenized sediment resulting from bioturbation. The mixed layer is host to complex biogeochemical cycles that directly impact ecosystem functioning, affecting ocean productivity and marine biodiversity. The timing of origin of the mixed layer has been controversial, with estimates ranging from Cambrian to Silurian, hindering our understanding of biogeochemical cycling and ecosystem dynamics in deep time. Here we report evidence from the Global Stratotype Section and Point (GSSP) of the basal Cambrian in the Burin Peninsula of Newfoundland, Canada, showing that a well-developed mixed layer of similar structure to that of modern marine sediments was established in shallow marine settings by the early Cambrian (approximately 529 million years ago). These findings imply that the benthos significantly contributed to establishing new biogeochemical cycles during the Cambrian explosion.

References

May 1, 1992·Applied and Environmental Microbiology·P Vandevivere, P Baveye
Aug 12, 2006·Trends in Ecology & Evolution·Filip J R MeysmanCarlo H R Heip
May 7, 2008·Trends in Ecology & Evolution·Douglas H Erwin
May 20, 2009·Proceedings of the National Academy of Sciences of the United States of America·Donald E Canfield, James Farquhar
Mar 29, 2014·Nature Communications·Luis A BuatoisPaul Myrow
Feb 7, 2015·Nature Communications·Jonathan MalarkeyPeter D Thorne

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Citations

Jul 10, 2020·Interface Focus·M Gabriela Mángano, Luis A Buatois
May 20, 2020·Proceedings of the National Academy of Sciences of the United States of America·Thomas A LaaksoAndrew H Knoll

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