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

Polo-Cavia, N., Boyero, L., Martín-Beyer, B., Barmuta, L.A., and Bosch, J. (2017) Joint effects of rising temperature and the presence of introduced predatory fish on montane amphibian populations. Animal Conservation, 20 (2). pp. 128-134.

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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 ID: 54095
Item Type: Article (Research - C1)
ISSN: 1469-1795
Keywords: climate change; climate warming; development; introduced species; predator recognition; Rana iberica; Salamandra salamandra; temperature
Funders: Spanish Ministry of Science and Innovation (MICINN), Ikerbasque
Projects and Grants: MICINN grant CGL2010-16285, MICINN grant CGL2011-25062, MICINN grant CGL2015-68670-R
Date Deposited: 15 Jun 2018 03:52
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 30%
05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050103 Invasive Species Ecology @ 40%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 30%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960810 Mountain and High Country Flora, Fauna and Biodiversity @ 30%
96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960409 Control of Pests, Diseases and Exotic Species in Mountain and High Country Environments @ 40%
96 ENVIRONMENT > 9603 Climate and Climate Change > 960304 Climate Variability (excl. Social Impacts) @ 30%
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