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Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end

Caves are perceived as isolated, extreme habitats with a uniquely specialized biota, which long ago led to the idea that caves are “evolutionary dead‐ends.” This implies that cave‐adapted taxa may be doomed for extinction before they can diversify or transition to a more stable state. However, this...

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Autores principales: Stern, David B., Breinholt, Jesse, Pedraza‐Lara, Carlos, López‐Mejía, Marilú, Owen, Christopher L., Bracken‐Grissom, Heather, Fetzner, James W., Crandall, Keith A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5656817/
https://www.ncbi.nlm.nih.gov/pubmed/28804900
http://dx.doi.org/10.1111/evo.13326
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author Stern, David B.
Breinholt, Jesse
Pedraza‐Lara, Carlos
López‐Mejía, Marilú
Owen, Christopher L.
Bracken‐Grissom, Heather
Fetzner, James W.
Crandall, Keith A.
author_facet Stern, David B.
Breinholt, Jesse
Pedraza‐Lara, Carlos
López‐Mejía, Marilú
Owen, Christopher L.
Bracken‐Grissom, Heather
Fetzner, James W.
Crandall, Keith A.
author_sort Stern, David B.
collection PubMed
description Caves are perceived as isolated, extreme habitats with a uniquely specialized biota, which long ago led to the idea that caves are “evolutionary dead‐ends.” This implies that cave‐adapted taxa may be doomed for extinction before they can diversify or transition to a more stable state. However, this hypothesis has not been explicitly tested in a phylogenetic framework with multiple independently evolved cave‐dwelling groups. Here, we use the freshwater crayfish, a group with dozens of cave‐dwelling species in multiple lineages, as a system to test this hypothesis. We consider historical patterns of lineage diversification and habitat transition as well as current patterns of geographic range size. We find that while cave‐dwelling lineages have small relative range sizes and rarely transition back to the surface, they exhibit remarkably similar diversification patterns to those of other habitat types and appear to be able to maintain a diversity of lineages through time. This suggests that cave adaptation is not a “dead‐end” for freshwater crayfish, which has positive implications for our understanding of biodiversity and conservation in cave habitats.
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spelling pubmed-56568172017-11-01 Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end Stern, David B. Breinholt, Jesse Pedraza‐Lara, Carlos López‐Mejía, Marilú Owen, Christopher L. Bracken‐Grissom, Heather Fetzner, James W. Crandall, Keith A. Evolution Brief Communications Caves are perceived as isolated, extreme habitats with a uniquely specialized biota, which long ago led to the idea that caves are “evolutionary dead‐ends.” This implies that cave‐adapted taxa may be doomed for extinction before they can diversify or transition to a more stable state. However, this hypothesis has not been explicitly tested in a phylogenetic framework with multiple independently evolved cave‐dwelling groups. Here, we use the freshwater crayfish, a group with dozens of cave‐dwelling species in multiple lineages, as a system to test this hypothesis. We consider historical patterns of lineage diversification and habitat transition as well as current patterns of geographic range size. We find that while cave‐dwelling lineages have small relative range sizes and rarely transition back to the surface, they exhibit remarkably similar diversification patterns to those of other habitat types and appear to be able to maintain a diversity of lineages through time. This suggests that cave adaptation is not a “dead‐end” for freshwater crayfish, which has positive implications for our understanding of biodiversity and conservation in cave habitats. John Wiley and Sons Inc. 2017-09-20 2017-10 /pmc/articles/PMC5656817/ /pubmed/28804900 http://dx.doi.org/10.1111/evo.13326 Text en © 2017 The Author(s). Evolution published by Wiley Periodicals, Inc. on behalf of The Society for the Study of Evolution. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Brief Communications
Stern, David B.
Breinholt, Jesse
Pedraza‐Lara, Carlos
López‐Mejía, Marilú
Owen, Christopher L.
Bracken‐Grissom, Heather
Fetzner, James W.
Crandall, Keith A.
Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
title Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
title_full Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
title_fullStr Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
title_full_unstemmed Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
title_short Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
title_sort phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead‐end
topic Brief Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5656817/
https://www.ncbi.nlm.nih.gov/pubmed/28804900
http://dx.doi.org/10.1111/evo.13326
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