Evidence map›Paper›PMID 33876750›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Global warming is causing a more pronounced dip in marine species richness around the equator.

Chhaya Chaudhary, Anthony J Richardson, David S Schoeman, Mark J Costello

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed, 1 pooled it
–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

61 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  18. Clustered warming tolerances and the nonlinear risks of biodiversity loss on a warming planet.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
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1 more citing papers are in PubMed but not listed here.

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

4 authors.

Chhaya ChaudharyInstitute of Marine Science, The University of Auckland, Auckland 1142, New Zealand; ccha961@aucklanduni.ac.nz.
Anthony J RichardsonSchool of Mathematics and Physics, The University of Queensland, St Lucia, QLD 4072, Australia.ORCID 0000-0002-9289-7366
David S SchoemanGlobal-Change Ecology Research Group, School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4556, Australia.ORCID 0000-0003-1258-0885
Mark J CostelloThe School of Environment, The University of Auckland, Auckland 1142, New Zealand.ORCID 0000-0003-2362-0328

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The latitudinal gradient in species richness, with more species in the tropics and richness declining with latitude, is widely known and has been assumed to be stable over recent centuries. We analyzed data on 48,661 marine animal species since 1955, accounting for sampling variation, to assess whether the global latitudinal gradient in species richness is being impacted by climate change. We confirm recent studies that show a slight dip in species richness at the equator. Moreover, richness across latitudinal bands was sensitive to temperature, reaching a plateau or declining above a mean annual sea surface temperature of 20 °C for most taxa. In response, since the 1970s, species richness has declined at the equator relative to an increase at midlatitudes and has shifted north in the northern hemisphere, particularly among pelagic species. This pattern is consistent with the hypothesis that climate change is impacting the latitudinal gradient in marine biodiversity at a global scale. The intensification of the dip in species richness at the equator, especially for pelagic species, suggests that it is already too warm there for some species to survive.

Indexed as

BiodiversityGlobal WarmingAquatic OrganismsBiomassclimate changeGAMlatitudinal gradientOBISspecies richness

Identifiers

PMID33876750
PMCPMC8054016

What OpenQuestion holds

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Read underepoch 390

Registered trials

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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.