Article (Scientific journals)
Repeated ecological and life cycle transitions make salamanders an ideal model for evolution and development
Bonett, Ronald M.; Ledbetter, Nicholus M.; Hess, Alexander J. et al.
2022In Developmental Dynamics, 251 (6), p. 957-972
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Keywords :
adaptive zones; biphasic; direct development; paedomorphosis; metamorphosis; traits; review; salamander; newt; vertebrae; body size; evolution; ecology; phylogeny; progenesis; neoteny; heterochrony; evo-devo; model; axolotl; genome; limbs; facultative paedomorphosis; life-history traits; synthesis; skeletal evolution; stress; thyroid
Abstract :
[en] Observations on the ontogeny and diversity of salamanders provided some of the earliest evidence that shifts in developmental trajectories have made a substantial contribution to the evolution of animal forms. Since the dawn of evo-devo there have been major advances in understanding developmental mechanisms, phylogenetic relationships, evolutionary models, and an appreciation for the impact of ecology on patterns of development (eco-evo-devo). Molecular phylogenetic analyses have converged on strong support for the majority of branches in the Salamander Tree of Life, which includes 764 described species. Ancestral reconstructions reveal repeated transitions between life cycle modes and ecologies. The salamander fossil record is scant, but key Mesozoic species support the antiquity of life cycle transitions in some families. Colonization of diverse habitats has promoted phenotypic diversification and sometimes convergence when similar environments have been independently invaded. However, unrelated lineages may follow different developmental pathways to arrive at convergent phenotypes. This article summarizes ecological and endocrine based causes of life cycle transitions in salamanders, as well as consequences to body size, genome size, and skeletal structure. Salamanders offer a rich source of comparisons for understanding how the evolution of developmental patterns has led to phenotypic diversification following shifts to new adaptive zones.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Zoology
Environmental sciences & ecology
Genetics & genetic processes
Author, co-author :
Bonett, Ronald M.;  University of Tulsa
Ledbetter, Nicholus M.;  University of Tulsa
Hess, Alexander J.;  University of Tulsa
Herrboldt, Madison A.;  University of Tulsa
Denoël, Mathieu  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire d'Écologie et de Conservation des Amphibiens
Language :
English
Title :
Repeated ecological and life cycle transitions make salamanders an ideal model for evolution and development
Publication date :
June 2022
Journal title :
Developmental Dynamics
ISSN :
1058-8388
eISSN :
1097-0177
Publisher :
John Wiley & Sons, Hoboken, United States - New York
Volume :
251
Issue :
6
Pages :
957-972
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
NSF - National Science Foundation [US-VA] [US-VA]
Commentary :
This paper is published by Wiley (see DOI). It is part of the special issue: Salamander Models for Elucidating Mechanisms of Developmental Biology, Evolution & Regeneration/Repair: Part Two
Available on ORBi :
since 24 May 2021

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