NDLI: Legacy of road salt: Apparent positive larval effects counteracted by negative postmetamorphic effects in wood frogs.

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Legacy of road salt: Apparent positive larval effects counteracted by negative postmetamorphic effects in wood frogs.

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Legacy of road salt: Apparent positive larval effects counteracted by negative postmetamorphic effects in wood frogs.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Dananay, Kacey L. Krynak, Katherine L. Krynak, Timothy J. Benard, Michael F.
Description	Country affiliation: United States Author Affiliation: Dananay KL ( Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA.); Krynak KL ( Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA.); Krynak TJ ( Natural Resource Division, Cleveland Metroparks, Parma, Ohio, USA.); Benard MF ( Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA.)
Abstract	Road salt runoff has potentially large effects on wetland communities, but is typically investigated in short-term laboratory trials. The authors investigated effects of road salt contamination on wood frogs (Rana sylvatica) by combining a field survey with 2 separate experiments. The field survey tested whether wood frog larval traits were associated with road salt contamination in natural wetlands. As conductivity increased, wood frog larvae were less abundant, but those found were larger. In the first experiment of the present study, the authors raised larvae in outdoor artificial ponds under 4 salt concentrations and measured larval vital rates, algal biomass, and zooplankton abundance. Salt significantly increased larval growth, algal biomass, and decreased zooplankton abundance. In the second experiment, the authors raised larvae to metamorphosis in the presence and absence of salt contamination and followed resulting juvenile frogs in terrestrial pens at high and low densities. Exposure to road salt as larvae caused juvenile frogs to have greater mortality in low-density terrestrial environments, possibly because of altered energy allocation, changes in behavior, or reduced immune defenses. The present study suggests that low concentrations of road salt can have positive effects on larval growth yet negative effects on juvenile survival. These results emphasize the importance of testing for effects of contaminants acting through food webs and across multiple life stages as well as the potential for population-level consequences in natural environments.
File Format	HTM / HTML
ISSN	07307268
Issue Number	10
Volume Number	34
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2015-10-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sodium Chloride Ponds Discipline Environmental Health Discipline Toxicology Pharmacology Biomass Drug Effects Journal Article Metamorphosis, Biological Food Chain Growth & Development Regression Analysis Animals Larva Discipline Chemistry Ranidae Physiology Zooplankton
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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