Evidence map›Paper›PMID 31932703›Full record

ArticleNature ecology & evolution2020

Macroevolutionary convergence connects morphological form to ecological function in birds.

Alex L Pigot, Catherine Sheard, Eliot T Miller, Tom P Bregman, Benjamin G Freeman, Uri Roll, Nathalie Seddon, Christopher H Trisos, Brian C Weeks, Joseph A Tobias

Abstract read
PubMed Publisher
In one paragraph

Article in Nature ecology & evolution, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 159 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
159citing papers in PubMed, 2 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

159 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. The link between colorfulness and extinction risk across the world's passerine birds.Conservation biology : the journal of the Society for Conservation Biology · 2026
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Diet of bird-like troodontid dinosaurs: synthesis of a contentious clade.Biological reviews of the Cambridge Philosophical Society · 2026
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

99 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors.

Alex L Pigot *Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, UK. a.pigot@ucl.ac.uk.ORCID http://orcid.org/0000-0002-6490-6261
Catherine Sheard *Department of Zoology, University of Oxford, Oxford, UK.
Eliot T MillerCornell Lab of Ornithology, Ithaca, NY, USA.
Tom P BregmanDepartment of Zoology, University of Oxford, Oxford, UK.
Benjamin G FreemanBiodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.ORCID http://orcid.org/0000-0001-6131-6832
Uri RollDepartment of Zoology, University of Oxford, Oxford, UK.ORCID http://orcid.org/0000-0002-5418-1164
Nathalie SeddonDepartment of Zoology, University of Oxford, Oxford, UK.
Christopher H TrisosDepartment of Zoology, University of Oxford, Oxford, UK.ORCID http://orcid.org/0000-0002-5854-1489
Brian C WeeksSchool for Environment and Sustainability, University of Michigan, Ann Arbor, MI, USA.
Joseph A TobiasDepartment of Zoology, University of Oxford, Oxford, UK. j.tobias@imperial.ac.uk.ORCID http://orcid.org/0000-0003-2429-6179

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Animals have diversified into a bewildering variety of morphological forms exploiting a complex configuration of trophic niches. Their morphological diversity is widely used as an index of ecosystem function, but the extent to which animal traits predict trophic niches and associated ecological processes is unclear. Here we use the measurements of nine key morphological traits for >99% bird species to show that avian trophic diversity is described by a trait space with four dimensions. The position of species within this space maps with 70-85% accuracy onto major niche axes, including trophic level, dietary resource type and finer-scale variation in foraging behaviour. Phylogenetic analyses reveal that these form-function associations reflect convergence towards predictable trait combinations, indicating that morphological variation is organized into a limited set of dimensions by evolutionary adaptation. Our results establish the minimum dimensionality required for avian functional traits to predict subtle variation in trophic niches and provide a global framework for exploring the origin, function and conservation of bird diversity.

Indexed as

BirdsEcosystemAnimalsBiological EvolutionEcologyPhylogeny

Identifiers

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.