The tempo of Ediacaran evolution

Chuan Yang, Alan D. Rooney, Daniel J. Condon, Xian Hua Li, Dmitriy V. Grazhdankin, Fred T. Bowyer, Chunlin Hu, Francis A. Macdonald, Maoyan Zhu

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

The rise of complex macroscopic life occurred during the Ediacaran Period, an interval that witnessed large-scale disturbances to biogeochemical systems. The current Ediacaran chronostratigraphic framework is of insufficient resolution to provide robust global correlation schemes or test hypotheses for the role of biogeochemical cycling in the evolution of complex life. Here, we present new radio-isotopic dates from Ediacaran strata that directly constrain key fossil assemblages and large-magnitude carbon cycle perturbations. These new dates and integrated global correlations demonstrate that late Ediacaran strata of South China are time transgressive and that the 575-to 550-Ma interval is marked by two large negative carbon isotope excursions: the Shuram and a younger one that ended ca. 550 Ma ago. These data calibrate the tempo of Ediacaran evolution characterized by intervals of tens of millions of years of increasing ecosystem complexity, interrupted by biological turnovers that coincide with large perturbations to the carbon cycle.

Язык оригиналаанглийский
Номер статьиeabi9643
ЖурналScience advances
Том7
Номер выпуска45
DOI
СостояниеОпубликовано - ноя 2021

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