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The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
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Updated: Sep 12, 2025

Author Spotlight: Unveiling Plankton Response to Climate Change Through Time-Series Data and Artistic Expression
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Macroevolution: Marine biomass and biodiversity through deep time.

Steven M Holland1

  • 1Department of Geology, University of Georgia, Athens, GA 30602-2501, USA.

Current Biology : CB
|August 5, 2025
PubMed
Summary

Marine biodiversity and biomass have long been suspected to be linked. A new study confirms this link using the first-ever deep-time biomass dataset.

Area of Science:

  • Paleontology
  • Marine Biology
  • Ecology

Background:

  • A close relationship between marine biomass and biodiversity has been hypothesized for over 500 million years.
  • However, a lack of historical biomass data has prevented empirical confirmation.

Purpose of the Study:

  • To investigate the long-suspected link between marine biomass and global marine biodiversity over geological timescales.
  • To establish the first comprehensive biomass dataset spanning deep time.

Main Methods:

  • Compilation of an innovative, first-ever biomass dataset.
  • Analysis of this dataset to assess correlations with marine biodiversity indicators across geological time.

Main Results:

  • The study successfully compiled a novel biomass dataset covering a vast historical period.

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  • The data confirm a significant and long-suspected correlation between biomass and marine biodiversity.

    • Conclusions:

    • The findings provide strong empirical support for the hypothesis that marine biomass and biodiversity are closely interconnected throughout Earth's history.
    • This study opens new avenues for understanding the dynamics of marine ecosystems over evolutionary timescales.