Evidence map›Paper›PMID 36237480›Full record

ArticleAnnual review of ecology, evolution, and systematics2019

The paradox behind the pattern of rapid adaptive radiation: how can the speciation process sustain itself through an early burst?

Christopher H Martin, Emilie J Richards

Abstract read
In one paragraph

Article in Annual review of ecology, evolution, and systematics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing 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

44 citing papers in PubMed.

  1. Article
  2. Physiology is a hidden dimension of diversity in the radiation of woodland salamanders.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  9. The many origins of extremophile fishes.Proceedings. Biological sciences · 2025
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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

2 authors.

Christopher H MartinDepartment of Biology, University of North Carolina at Chapel Hill, NC, USA.
Emilie J RichardsDepartment of Biology, University of North Carolina at Chapel Hill, NC, USA.

Funding

Discovery and functional analysis of novel candidate genes and variants underlying craniofacial diversification in Cyprinodon pupfishesR01DE027052 · NIDCR · UNIV OF NORTH CAROLINA CHAPEL HILL · PI Christopher Herbert Martin · 2018 to 2026
$3.0M
NIDCR NIH HHS R01 DE027052
6 · The paper itself

Abstract

Rapid adaptive radiation poses a distinct question apart from speciation and adaptation: what happens after one speciation event? That is, how are some lineages able to continue speciating through a rapid burst? This question connects global macroevolutionary patterns to microevolutionary processes. Here we review major features of rapid radiations in nature and their mismatch with theoretical models and what is currently known about speciation mechanisms. Rapid radiations occur on three major diversification axes - species richness, phenotypic disparity, and ecological diversity - with exceptional outliers on each axis. The paradox is that the hallmark early stage of adaptive radiation, a rapid burst of speciation and niche diversification, is contradicted by most existing speciation models which instead predict continuously decelerating speciation rates and niche subdivision through time. Furthermore, while speciation mechanisms such as magic traits, phenotype matching, and physical linkage of co-adapted alleles promote speciation, it is often not discussed how these mechanisms could promote multiple speciation events in rapid succession. Additional mechanisms beyond ecological opportunity are needed to understand how rapid radiations occur. We review the evidence for five emerging theories: 1) the 'transporter' hypothesis: introgression and the ancient origins of adaptive alleles, 2) the 'signal complexity' hypothesis: the dimensionality of sexual traits, 3) the connectivity of fitness landscapes, 4) 'diversity begets diversity', and 5) flexible stem/'plasticity first'. We propose new questions and predictions to guide future work on the mechanisms underlying the rare origins of rapid radiation.

Indexed as

adaptive dynamicsadaptive radiationdisruptive selectionearly burstecological opportunityfitness landscapehybridizationintrogressionmate choicespeciation

Identifiers

PMID36237480
PMCPMC9555815

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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.