Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?

Anurans have been introduced in many parts of the world and have often become invasive over large geographic areas. Although predation is involved in the declines of invaded amphibian populations, there is a lack of quantitative assessments evaluating the potential risk posed to native species. This...

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Autores principales:	Fabien Pille, Laura Pinto, Mathieu Denoël
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	amphibian decline invasive alien species predatory risk size-selective predation <i>Pelophylax ridibundus</i> water frogs Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/23b1c90942e94d64b14a99c651a14f3c
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spelling	oai:doaj.org-article:23b1c90942e94d64b14a99c651a14f3c2021-11-25T17:23:00ZPredation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?10.3390/d131105951424-2818https://doaj.org/article/23b1c90942e94d64b14a99c651a14f3c2021-11-01T00:00:00Zhttps://www.mdpi.com/1424-2818/13/11/595https://doaj.org/toc/1424-2818Anurans have been introduced in many parts of the world and have often become invasive over large geographic areas. Although predation is involved in the declines of invaded amphibian populations, there is a lack of quantitative assessments evaluating the potential risk posed to native species. This is particularly true for <i>Pelophylax</i> water frogs, which have invaded large parts of western Europe, but no studies to date have examined their predation on other amphibians in their invaded range. Predation of native amphibians by marsh frogs (<i>Pelophylax ridibundus</i>) was assessed by stomach flushing once a month over four months in 21 ponds in southern France. Nine percent of stomachs contained amphibians. Seasonality was a major determinant of amphibian consumption. This effect was mediated by body size, with the largest invaders ingesting bigger natives, such as tree frogs. These results show that invasive marsh frogs represent a threat through their ability to forage on natives, particularly at the adult stage. The results also indicate that large numbers of native amphibians are predated. More broadly, the fact that predation was site- and time-specific highlights the need for repeated samplings across habitats and key periods for a clear understanding of the impact of invaders.Fabien PilleLaura PintoMathieu DenoëlMDPI AGarticleamphibian declineinvasive alien speciespredatory risksize-selective predation<i>Pelophylax ridibundus</i>water frogsBiology (General)QH301-705.5ENDiversity, Vol 13, Iss 595, p 595 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	amphibian decline invasive alien species predatory risk size-selective predation <i>Pelophylax ridibundus</i> water frogs Biology (General) QH301-705.5
spellingShingle	amphibian decline invasive alien species predatory risk size-selective predation <i>Pelophylax ridibundus</i> water frogs Biology (General) QH301-705.5 Fabien Pille Laura Pinto Mathieu Denoël Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?
description	Anurans have been introduced in many parts of the world and have often become invasive over large geographic areas. Although predation is involved in the declines of invaded amphibian populations, there is a lack of quantitative assessments evaluating the potential risk posed to native species. This is particularly true for <i>Pelophylax</i> water frogs, which have invaded large parts of western Europe, but no studies to date have examined their predation on other amphibians in their invaded range. Predation of native amphibians by marsh frogs (<i>Pelophylax ridibundus</i>) was assessed by stomach flushing once a month over four months in 21 ponds in southern France. Nine percent of stomachs contained amphibians. Seasonality was a major determinant of amphibian consumption. This effect was mediated by body size, with the largest invaders ingesting bigger natives, such as tree frogs. These results show that invasive marsh frogs represent a threat through their ability to forage on natives, particularly at the adult stage. The results also indicate that large numbers of native amphibians are predated. More broadly, the fact that predation was site- and time-specific highlights the need for repeated samplings across habitats and key periods for a clear understanding of the impact of invaders.
format	article
author	Fabien Pille Laura Pinto Mathieu Denoël
author_facet	Fabien Pille Laura Pinto Mathieu Denoël
author_sort	Fabien Pille
title	Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?
title_short	Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?
title_full	Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?
title_fullStr	Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?
title_full_unstemmed	Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?
title_sort	predation pressure of invasive marsh frogs: a threat to native amphibians?
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/23b1c90942e94d64b14a99c651a14f3c
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Predation Pressure of Invasive Marsh Frogs: A Threat to Native Amphibians?

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