Cargando…

Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)

Salinity is the primary driver of osmoregulatory evolution in decapods, and may have influenced their diversification into different osmotic niches. In semi-terrestrial crabs, hyper-osmoregulatory ability favors sojourns into burrows and dilute media, and provides a safeguard against hemolymph dilut...

Descripción completa

Detalles Bibliográficos
Autores principales: Faria, Samuel Coelho, Provete, Diogo Borges, Thurman, Carl Leo, McNamara, John Campbell
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5300755/
https://www.ncbi.nlm.nih.gov/pubmed/28182764
http://dx.doi.org/10.1371/journal.pone.0171870
_version_ 1782506241785856000
author Faria, Samuel Coelho
Provete, Diogo Borges
Thurman, Carl Leo
McNamara, John Campbell
author_facet Faria, Samuel Coelho
Provete, Diogo Borges
Thurman, Carl Leo
McNamara, John Campbell
author_sort Faria, Samuel Coelho
collection PubMed
description Salinity is the primary driver of osmoregulatory evolution in decapods, and may have influenced their diversification into different osmotic niches. In semi-terrestrial crabs, hyper-osmoregulatory ability favors sojourns into burrows and dilute media, and provides a safeguard against hemolymph dilution; hypo-osmoregulatory ability underlies emersion capability and a life more removed from water sources. However, most comparative studies have neglected the roles of the phylogenetic and environmental components of inter-specific physiological variation, hindering evaluation of phylogenetic patterns and the adaptive nature of osmoregulatory evolution. Semi-terrestrial fiddler crabs (Uca) inhabit fresh to hyper-saline waters, with species from the Americas occupying higher intertidal habitats than Indo-west Pacific species mainly found in the low intertidal zone. Here, we characterize numerous osmoregulatory traits in all ten fiddler crabs found along the Atlantic coast of Brazil, and we employ phylogenetic comparative methods using 24 species to test for: (i) similarities of osmoregulatory ability among closely related species; (ii) salinity as a driver of osmoregulatory evolution; (iii) correlation between salt uptake and secretion; and (iv) adaptive peaks in osmoregulatory ability in the high intertidal American lineages. Our findings reveal that osmoregulation in Uca exhibits strong phylogenetic patterns in salt uptake traits. Salinity does not correlate with hyper/hypo-regulatory abilities, but drives hemolymph osmolality at ambient salinities. Osmoregulatory traits have evolved towards three adaptive peaks, revealing a significant contribution of hyper/hypo-regulatory ability in the American clades. Thus, during the evolutionary history of fiddler crabs, salinity has driven some of the osmoregulatory transformations that underpin habitat diversification, although others are apparently constrained phylogenetically.
format Online
Article
Text
id pubmed-5300755
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-53007552017-02-28 Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca) Faria, Samuel Coelho Provete, Diogo Borges Thurman, Carl Leo McNamara, John Campbell PLoS One Research Article Salinity is the primary driver of osmoregulatory evolution in decapods, and may have influenced their diversification into different osmotic niches. In semi-terrestrial crabs, hyper-osmoregulatory ability favors sojourns into burrows and dilute media, and provides a safeguard against hemolymph dilution; hypo-osmoregulatory ability underlies emersion capability and a life more removed from water sources. However, most comparative studies have neglected the roles of the phylogenetic and environmental components of inter-specific physiological variation, hindering evaluation of phylogenetic patterns and the adaptive nature of osmoregulatory evolution. Semi-terrestrial fiddler crabs (Uca) inhabit fresh to hyper-saline waters, with species from the Americas occupying higher intertidal habitats than Indo-west Pacific species mainly found in the low intertidal zone. Here, we characterize numerous osmoregulatory traits in all ten fiddler crabs found along the Atlantic coast of Brazil, and we employ phylogenetic comparative methods using 24 species to test for: (i) similarities of osmoregulatory ability among closely related species; (ii) salinity as a driver of osmoregulatory evolution; (iii) correlation between salt uptake and secretion; and (iv) adaptive peaks in osmoregulatory ability in the high intertidal American lineages. Our findings reveal that osmoregulation in Uca exhibits strong phylogenetic patterns in salt uptake traits. Salinity does not correlate with hyper/hypo-regulatory abilities, but drives hemolymph osmolality at ambient salinities. Osmoregulatory traits have evolved towards three adaptive peaks, revealing a significant contribution of hyper/hypo-regulatory ability in the American clades. Thus, during the evolutionary history of fiddler crabs, salinity has driven some of the osmoregulatory transformations that underpin habitat diversification, although others are apparently constrained phylogenetically. Public Library of Science 2017-02-09 /pmc/articles/PMC5300755/ /pubmed/28182764 http://dx.doi.org/10.1371/journal.pone.0171870 Text en © 2017 Faria et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Faria, Samuel Coelho
Provete, Diogo Borges
Thurman, Carl Leo
McNamara, John Campbell
Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)
title Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)
title_full Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)
title_fullStr Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)
title_full_unstemmed Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)
title_short Phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (Brachyura, Uca)
title_sort phylogenetic patterns and the adaptive evolution of osmoregulation in fiddler crabs (brachyura, uca)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5300755/
https://www.ncbi.nlm.nih.gov/pubmed/28182764
http://dx.doi.org/10.1371/journal.pone.0171870
work_keys_str_mv AT fariasamuelcoelho phylogeneticpatternsandtheadaptiveevolutionofosmoregulationinfiddlercrabsbrachyurauca
AT provetediogoborges phylogeneticpatternsandtheadaptiveevolutionofosmoregulationinfiddlercrabsbrachyurauca
AT thurmancarlleo phylogeneticpatternsandtheadaptiveevolutionofosmoregulationinfiddlercrabsbrachyurauca
AT mcnamarajohncampbell phylogeneticpatternsandtheadaptiveevolutionofosmoregulationinfiddlercrabsbrachyurauca