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Joint effects of rising temperature and the presence of introduced predatory fish on montane amphibian populations

Citation

Polo-Cavia, N and Boyero, L and Martin-Beyer, B and Barmuta, LA and Bosch, J, Joint effects of rising temperature and the presence of introduced predatory fish on montane amphibian populations, Animal Conservation, 20, (2) pp. 128-134. ISSN 1367-9430 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 The Zoological Society of London

DOI: doi:10.1111/acv.12294

Abstract

Amphibian populations in montane habitats are often subjected to high thermal variability, which may exacerbate anthropogenic impacts such as the introduction of exotic species. Here, we present data from two experiments exploring the joint effects of rising temperatures and the presence of waterborne cues from an exotic predatory fish on the short- and long-term antipredatory responses (i.e. activity and time to metamorphosis respectively) of Rana iberica and Salamandra salamandra larvae from two montane amphibian populations. We found some evidence of a cumulative effect of an increase in temperature and the presence of predators. Although predator recognition was not precluded at rising temperatures, we observed an increase in larval activity in warmer water, which might negatively affect survival by favoring prey detectability by predators. We also observed a strong quadratic effect of temperature and a joint effect of temperature and predators on larval development: at intermediate temperatures, larvae exposed to exotic trout cues had greatly accelerated metamorphosis. These results suggest that warmer conditions might be particularly harmful for larvae in montane wetlands enduring the presence of exotic predators.

Item Details

Item Type:Refereed Article
Keywords:freshwater, benthos, predator, fish, amphibian, temperature, cumulative effects
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Freshwater Ecology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Barmuta, LA (Associate Professor Leon Barmuta)
ID Code:123683
Year Published:2017
Deposited By:Zoology
Deposited On:2018-01-18
Last Modified:2018-07-30
Downloads:0

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