Evidence map›Paper›PMID 26787881›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Delayed fungal evolution did not cause the Paleozoic peak in coal production.

Matthew P Nelsen, William A DiMichele, Shanan E Peters, C Kevin Boyce

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
30.1field-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

23 citing papers in PubMed, 139 citations in OpenAlex.

  1. Article
  2. Article
  3. Repeated occurrences of marine anoxia under high atmospheric OProceedings of the National Academy of Sciences of the United States of America · 2025
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  12. Article
  13. The efficiency paradox: How wasteful competitors forge thrifty ecosystems.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  14. Article
  15. Fungal evolution: major ecological adaptations and evolutionary transitions.Biological reviews of the Cambridge Philosophical Society · 2019
    Review
  16. Evolutionary convergence in lignin-degrading enzymes.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  17. Article
  18. Article
  19. Review
  20. Formation of most of our coal brought Earth close to global glaciation.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Matthew P NelsenGeological Sciences, Stanford University, Stanford, CA 94305;
William A DiMicheleDepartment of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560;
Shanan E PetersDepartment of Geoscience, University of Wisconsin-Madison, Madison, WI 53706.
C Kevin BoyceGeological Sciences, Stanford University, Stanford, CA 94305; ckboyce@stanford.edu.
Stanford University · USNational Museum of Natural History · USUniversity of Wisconsin–Madison · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Organic carbon burial plays a critical role in Earth systems, influencing atmospheric O2 and CO2 concentrations and, thereby, climate. The Carboniferous Period of the Paleozoic is so named for massive, widespread coal deposits. A widely accepted explanation for this peak in coal production is a temporal lag between the evolution of abundant lignin production in woody plants and the subsequent evolution of lignin-degrading Agaricomycetes fungi, resulting in a period when vast amounts of lignin-rich plant material accumulated. Here, we reject this evolutionary lag hypothesis, based on assessment of phylogenomic, geochemical, paleontological, and stratigraphic evidence. Lignin-degrading Agaricomycetes may have been present before the Carboniferous, and lignin degradation was likely never restricted to them and their class II peroxidases, because lignin modification is known to occur via other enzymatic mechanisms in other fungal and bacterial lineages. Furthermore, a large proportion of Carboniferous coal horizons are dominated by unlignified lycopsid periderm with equivalent coal accumulation rates continuing through several transitions between floral dominance by lignin-poor lycopsids and lignin-rich tree ferns and seed plants. Thus, biochemical composition had little relevance to coal accumulation. Throughout the fossil record, evidence of decay is pervasive in all organic matter exposed subaerially during deposition, and high coal accumulation rates have continued to the present wherever environmental conditions permit. Rather than a consequence of a temporal decoupling of evolutionary innovations between fungi and plants, Paleozoic coal abundance was likely the result of a unique combination of everwet tropical conditions and extensive depositional systems during the assembly of Pangea.

Indexed as

Biological EvolutionCoalFossilsFungiCoalcarbon cyclefungiligninlignin degradationwood rot

Identifiers

PMID26787881
PMCPMC4780611
OpenAlexW2275290105

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.