Evidence map›Paper›PMID 34727177›Full record

SynthesisJournal of experimental botany2022

Are cyclic plant and animal behaviours driven by gravimetric mechanical forces?

Cristiano de Mello Gallep, Daniel Robert

Open access · hybridAbstract readMeta-Analysis
In one paragraph

Synthesis in Journal of experimental botany, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% 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

4 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Lunar gravity predicts sleep timing.bioRxiv : the preprint server for biology · 2026
    Article
  3. Bioelectrical synchronization ofRoyal Society open science · 2025
    Article
  4. 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

2 authors at 2 institutions in 2 countries.

Cristiano de Mello GallepSchool of Technology, University of Campinas, r. Paschoal Marmo 1888, Limeira/SP, 13484-332, Brazil.ORCID 0000-0003-2261-9560
Daniel RobertSchool of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK.ORCID 0000-0002-5907-3912
Universidade Estadual de Campinas (UNICAMP) · BRUniversity of Bristol · GB

Funding

Biotechnology and Biological Sciences Research Council BB/N022556/1
6 · The paper itself

Abstract

The celestial mechanics of the Sun, Moon, and Earth dominate the variations in gravitational force that all matter, live or inert, experiences on Earth. Expressed as gravimetric tides, these variations are pervasive and have forever been part of the physical ecology with which organisms evolved. Here, we first offer a brief review of previously proposed explanations that gravimetric tides constitute a tangible and potent force shaping the rhythmic activities of organisms. Through meta-analysis, we then interrogate data from three study cases and show the close association between the omnipresent gravimetric tides and cyclic activity. As exemplified by free-running cyclic locomotor activity in isopods, reproductive effort in coral, and modulation of growth in seedlings, biological rhythms coincide with temporal patterns of the local gravimetric tide. These data reveal that, in the presumed absence of rhythmic cues such as light and temperature, local gravimetric tide is sufficient to entrain cyclic behaviour. The present evidence thus questions the phenomenological significance of so-called free-run experiments.

Indexed as

Circadian RhythmMoonAnimalsBehavior, AnimalGravitationSeedlingsAnimal activitybiological cyclescircadian biologygravimetric tidehuman activityplant growthplant movement

Identifiers

PMID34727177
PMCPMC8866634
OpenAlexW3210747503

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.