Carbon cycle shifts punctuated the pace of early complex life evolution
In short: Researchers examining fossils from the Ediacaran Period found that the rise of complex macroscopic life was not a steady progression. By using new radio-isotopic dates to map out geological history, they discovered that periods of growing ecosystem complexity were frequently interrupted by major biological turnovers.
The study highlights how these shifts coincided with significant disturbances in the global carbon cycle. This provides a clearer timeline for understanding how early life responded to large-scale environmental changes over millions of years.
The team used radio-isotopic dating and integrated global correlations to analyze strata from South China. However, because the current geological framework lacks high resolution, these findings are specific to certain regions and timeframes.
Why it matters: Early life evolution was a marathon of steady progress interrupted by sudden, large-scale environmental shocks.
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Sources
- Source: Research: Yang et al. (2021). The tempo of Ediacaran evolution. Science Advances. · cc-by-nc
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