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What shapes the trophic niche of European plethodontid salamanders?

The trophic niche is a life trait that identifies the consumer’s position in a local food web. Several factors, such as ontogeny, competitive ability and resource availability contribute in shaping species trophic niches. To date, information on the diet of European Hydromantes salamanders are only...

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Autores principales: Lunghi, Enrico, Cianferoni, Fabio, Ceccolini, Filippo, Veith, Michael, Manenti, Raoul, Mancinelli, Giorgio, Corti, Claudia, Ficetola, Gentile Francesco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6193653/
https://www.ncbi.nlm.nih.gov/pubmed/30335776
http://dx.doi.org/10.1371/journal.pone.0205672
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author Lunghi, Enrico
Cianferoni, Fabio
Ceccolini, Filippo
Veith, Michael
Manenti, Raoul
Mancinelli, Giorgio
Corti, Claudia
Ficetola, Gentile Francesco
author_facet Lunghi, Enrico
Cianferoni, Fabio
Ceccolini, Filippo
Veith, Michael
Manenti, Raoul
Mancinelli, Giorgio
Corti, Claudia
Ficetola, Gentile Francesco
author_sort Lunghi, Enrico
collection PubMed
description The trophic niche is a life trait that identifies the consumer’s position in a local food web. Several factors, such as ontogeny, competitive ability and resource availability contribute in shaping species trophic niches. To date, information on the diet of European Hydromantes salamanders are only available for a limited number of species, no dietary studies have involved more than one species of the genus at a time, and there are limited evidences on how multiple factors interact in determining diet variation. In this study we examined the diet of multiple populations of six out of the eight European cave salamanders, providing the first data on the diet for five of them. In addition, we assessed whether these closely related generalist species show similar diet and, for each species, we tested whether season, age class or sex influence the number and the type of prey consumed. Stomach condition (empty/full) and the number of prey consumed were strongly related to seasonality and to the activity level of individuals. Empty stomachs were more frequent in autumn, in individuals far from cave entrance and in juveniles. Diet composition was significantly different among species. Hydromantes imperialis and H. supramontis were the most generalist species; H. flavus and H. sarrabusensis fed mostly on Hymenoptera and Coleoptera Staphylinidae, while H. genei and H. ambrosii mostly consumed Arachnida and Endopterygota larvae. Furthermore, we detected seasonal shifts of diet in the majority of the species examined. Conversely, within each species, we did not find diet differences between females, males and juveniles. Although being assumed to have very similar dietary habits, here Hydromantes species were shown to be characterized by a high divergence in diet composition and in the stomach condition of individuals.
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spelling pubmed-61936532018-11-05 What shapes the trophic niche of European plethodontid salamanders? Lunghi, Enrico Cianferoni, Fabio Ceccolini, Filippo Veith, Michael Manenti, Raoul Mancinelli, Giorgio Corti, Claudia Ficetola, Gentile Francesco PLoS One Research Article The trophic niche is a life trait that identifies the consumer’s position in a local food web. Several factors, such as ontogeny, competitive ability and resource availability contribute in shaping species trophic niches. To date, information on the diet of European Hydromantes salamanders are only available for a limited number of species, no dietary studies have involved more than one species of the genus at a time, and there are limited evidences on how multiple factors interact in determining diet variation. In this study we examined the diet of multiple populations of six out of the eight European cave salamanders, providing the first data on the diet for five of them. In addition, we assessed whether these closely related generalist species show similar diet and, for each species, we tested whether season, age class or sex influence the number and the type of prey consumed. Stomach condition (empty/full) and the number of prey consumed were strongly related to seasonality and to the activity level of individuals. Empty stomachs were more frequent in autumn, in individuals far from cave entrance and in juveniles. Diet composition was significantly different among species. Hydromantes imperialis and H. supramontis were the most generalist species; H. flavus and H. sarrabusensis fed mostly on Hymenoptera and Coleoptera Staphylinidae, while H. genei and H. ambrosii mostly consumed Arachnida and Endopterygota larvae. Furthermore, we detected seasonal shifts of diet in the majority of the species examined. Conversely, within each species, we did not find diet differences between females, males and juveniles. Although being assumed to have very similar dietary habits, here Hydromantes species were shown to be characterized by a high divergence in diet composition and in the stomach condition of individuals. Public Library of Science 2018-10-18 /pmc/articles/PMC6193653/ /pubmed/30335776 http://dx.doi.org/10.1371/journal.pone.0205672 Text en © 2018 Lunghi 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
Lunghi, Enrico
Cianferoni, Fabio
Ceccolini, Filippo
Veith, Michael
Manenti, Raoul
Mancinelli, Giorgio
Corti, Claudia
Ficetola, Gentile Francesco
What shapes the trophic niche of European plethodontid salamanders?
title What shapes the trophic niche of European plethodontid salamanders?
title_full What shapes the trophic niche of European plethodontid salamanders?
title_fullStr What shapes the trophic niche of European plethodontid salamanders?
title_full_unstemmed What shapes the trophic niche of European plethodontid salamanders?
title_short What shapes the trophic niche of European plethodontid salamanders?
title_sort what shapes the trophic niche of european plethodontid salamanders?
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6193653/
https://www.ncbi.nlm.nih.gov/pubmed/30335776
http://dx.doi.org/10.1371/journal.pone.0205672
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