Evidence map›Paper›PMID 35953489›Full record

ArticleNature communications2022

Thermal adaptation best explains Bergmann's and Allen's Rules across ecologically diverse shorebirds.

Alexandra McQueen, Marcel Klaassen, Glenn J Tattersall, Robyn Atkinson, Roz Jessop, Chris J Hassell, Maureen Christie, Victorian Wader Study Group, Australasian Wader Studies Group, Matthew R E Symonds

Abstract read
In one paragraph

Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing 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

22 citing papers in PubMed.

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  14. Body size shapes song in honeyeaters.Proceedings. Biological sciences · 2024
    Article
  15. Climate change and its effects on body size and shape: the role of endocrine mechanisms.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
    Review
  16. Article
  17. Article
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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

10 authors.

Alexandra McQueenCentre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood, VIC, 3125, Australia.ORCID http://orcid.org/0000-0002-2375-963X
Marcel KlaassenCentre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, VIC, 3216, Australia.ORCID http://orcid.org/0000-0003-3907-9599
Glenn J TattersallDepartment of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, Saint Catharines, ON, L2S 3A1, Canada.ORCID http://orcid.org/0000-0002-6591-6760
Robyn AtkinsonBirdLife Australia, Carlton, VIC, 3053, Australia.
Roz JessopBirdLife Australia, Carlton, VIC, 3053, Australia.
Chris J HassellGlobal Flyway Network, PO Box 3089, Broome, WA, 6725, Australia.
Maureen ChristieFriends of Shorebirds SE, Carpenter Rocks, SA, 5291, Australia.
Victorian Wader Study Group
Australasian Wader Studies Group
Matthew R E SymondsCentre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood, VIC, 3125, Australia. matthew.symonds@deakin.edu.au.ORCID http://orcid.org/0000-0002-9785-6045

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bergmann's and Allen's rules state that endotherms should be larger and have shorter appendages in cooler climates. However, the drivers of these rules are not clear. Both rules could be explained by adaptation for improved thermoregulation, including plastic responses to temperature in early life. Non-thermal explanations are also plausible as climate impacts other factors that influence size and shape, including starvation risk, predation risk, and foraging ecology. We assess the potential drivers of Bergmann's and Allen's rules in 30 shorebird species using extensive field data (>200,000 observations). We show birds in hot, tropical northern Australia have longer bills and smaller bodies than conspecifics in temperate, southern Australia, conforming with both ecogeographical rules. This pattern is consistent across ecologically diverse species, including migratory birds that spend early life in the Arctic. Our findings best support the hypothesis that thermoregulatory adaptation to warm climates drives latitudinal patterns in shorebird size and shape.

Indexed as

AcclimatizationClimateAnimalsBirdsBody SizeTemperature

Identifiers

PMID35953489
PMCPMC9372053

What OpenQuestion holds

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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.