Evidence map›Paper›PMID 28813409›Full record

ArticleNature2017

The rise of algae in Cryogenian oceans and the emergence of animals.

Jochen J Brocks, Amber J M Jarrett, Eva Sirantoine, Christian Hallmann, Yosuke Hoshino, Tharika Liyanage

Abstract readHistorical Article
PubMed Publisher
In one paragraph

Article in Nature, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 113 papers.

0numbers the graph read from it
0cells of the map it votes in
113citing papers in PubMed
84.9field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

113 citing papers in PubMed, 552 citations in OpenAlex.

  1. Article
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  5. The archaeal roots of eukaryotic life.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  10. Organic geochemical evidence for life in Archean rocks identified by pyrolysis-GC-MS and supervised machine learning.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  11. Article
  12. Chemical characterization of CProceedings of the National Academy of Sciences of the United States of America · 2025
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  13. Article
  14. A diverse Palaeoproterozoic microbial ecosystem implies early eukaryogenesis.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  15. The chitin raft hypothesis for the colonization of the open ocean by cyanobacteria.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
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53 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Jochen J BrocksResearch School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
Amber J M JarrettResearch School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
Eva SirantoineResearch School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
Christian HallmannMax Planck Institute for Biogeochemistry, Hans-Knoell-Straße 10, 07745 Jena, Germany.
Yosuke HoshinoMax Planck Institute for Biogeochemistry, Hans-Knoell-Straße 10, 07745 Jena, Germany.
Tharika LiyanageResearch School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
Australian National University · AUMax Planck Institute for Biogeochemistry · DEUniversity of Bremen · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The transition from dominant bacterial to eukaryotic marine primary productivity was one of the most profound ecological revolutions in the Earth's history, reorganizing the distribution of carbon and nutrients in the water column and increasing energy flow to higher trophic levels. But the causes and geological timing of this transition, as well as possible links with rising atmospheric oxygen levels and the evolution of animals, remain obscure. Here we present a molecular fossil record of eukaryotic steroids demonstrating that bacteria were the only notable primary producers in the oceans before the Cryogenian period (720-635 million years ago). Increasing steroid diversity and abundance marks the rapid rise of marine planktonic algae (Archaeplastida) in the narrow time interval between the Sturtian and Marinoan 'snowball Earth' glaciations, 659-645 million years ago. We propose that the incumbency of cyanobacteria was broken by a surge of nutrients supplied by the Sturtian deglaciation. The 'Rise of Algae' created food webs with more efficient nutrient and energy transfers, driving ecosystems towards larger and increasingly complex organisms. This effect is recorded by the concomitant appearance of biomarkers for sponges and predatory rhizarians, and the subsequent radiation of eumetazoans in the Ediacaran period.

Indexed as

FossilsAnimalsBiomarkersCarbon CycleCyanobacteriaEukaryotaFood ChainHistory, AncientIce CoverOceans and SeasPhosphorusBiomarkersPhosphorus

Identifiers

PMID28813409
OpenAlexW2749763761

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.