Evidence map›Paper›PMID 33827811›Full record

ArticleScience advances2021

Truncated bimodal latitudinal diversity gradient in early Paleozoic phytoplankton.

Axelle Zacaï, Claude Monnet, Alexandre Pohl, Grégory Beaugrand, Gary Mullins, David M Kroeck, Thomas Servais

Abstract read
In one paragraph

Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
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

8 citing papers in PubMed.

  1. Article
  2. Article
  3. Colonial green algae in the Cambrian plankton.Proceedings. Biological sciences · 2023
    Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Palaeoecology of Cambrian-Ordovician acritarchs from China: evidence for a progressive invasion of the marine habitats.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Axelle ZacaïEvo-Eco-Paleo, UMR 8198, CNRS, Univ. Lille, F-59000 Lille, France. axelle.zacai@gmail.com.ORCID 0000-0002-1149-1082
Claude MonnetEvo-Eco-Paleo, UMR 8198, CNRS, Univ. Lille, F-59000 Lille, France.ORCID 0000-0002-0899-8392
Alexandre PohlDepartment of Earth and Planetary Sciences, University of California, Riverside, Riverside, CA, USA.ORCID 0000-0003-2328-351X
Grégory BeaugrandLaboratoire d'Océanologie et de Géosciences, UMR 8187, CNRS, Univ. Lille, F-59000 Lille, France.ORCID 0000-0002-0712-5223
Gary MullinsLlandudno LL30 1PB, UK.ORCID 0000-0001-7231-6061
David M KroeckEvo-Eco-Paleo, UMR 8198, CNRS, Univ. Lille, F-59000 Lille, France.
Thomas ServaisEvo-Eco-Paleo, UMR 8198, CNRS, Univ. Lille, F-59000 Lille, France.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The latitudinal diversity gradient (LDG)-the decline in species richness from the equator to the poles-is classically considered as the most pervasive macroecological pattern on Earth, but the timing of its establishment, its ubiquity in the geological past, and explanatory mechanisms remain uncertain. By combining empirical and modeling approaches, we show that the first representatives of marine phytoplankton exhibited an LDG from the beginning of the Cambrian, when most major phyla appeared. However, this LDG showed a single peak of diversity centered on the Southern Hemisphere, in contrast to the equatorial peak classically observed for most modern taxa. We find that this LDG most likely corresponds to a truncated bimodal gradient, which probably results from an uneven sediment preservation, smaller sampling effort, and/or lower initial diversity in the Northern Hemisphere. Variation of the documented LDG through time resulted primarily from fluctuations in annual sea-surface temperature and long-term climate changes.

Identifiers

PMID33827811
PMCPMC8026127

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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.