Hydric status influences salinity-dependent water selection in frogs from coastal wetlands

Lorrain-Soligon, Léa; Robin, Frédéric; Brischoux, François

doi:10.1016/j.physbeh.2022.113775

Cited by 3 publications

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“…First, it is possible that the effects of elevated salinity on locomotor performance ( Squires et al, 2008 ; Denoël et al, 2010 ; Wood and Welch, 2015 ; Hall et al, 2017 ) influence foraging efficiency, thereby decreasing energy gain and thus decreasing body condition. Second, lower body condition in individuals from brackish sites may be a mere consequence of dehydration (water effluxes) linked to contact with brackish water ( Shoemaker and Nagy, 1977 ; Gonzalez, 2012 ; Brischoux et al, 2017 ; Lorrain-Soligon et al, 2022a ). Third, osmoregulation can be energetically costly ( Kidder et al, 2006 ; Rivera-Ingraham and Lignot, 2017 ) and individuals living in brackish water may experience higher energy expenditure, thereby reducing their body condition ( De Boeck et al, 2000 ).…”

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confidence: 99%

From the Field to the Lab: Physiological and Behavioural Consequences of Environmental Salinity in a Coastal Frog

et al. 2022

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Environmental salinization is recognized as a global threat affecting biodiversity, particularly in coastal ecosystems (affected by sea level rise and increased frequency and severity of storms), and the consequent osmoregulatory challenges can negatively affect wildlife. In order to assess whether coastal species can respond to changes in environmental salinity, it remains essential to investigate the consequences of exposure to salinity in an environmentally-relevant context. In this study, we assessed the consequences of exposure to environmental salinity in coastal frogs (Pelophylax sp., N = 156) both in the field and experimentally, using a comprehensive combination of markers of physiology, behaviour and ecology. Exposure to salinity in the field negatively affected physiological parameters (osmolality, monocytes and eosinophils counts), as well as body condition and locomotor performance, and influenced size- and sex-specific habitat selection. Further, we demonstrated in a controlled experiment that short-term exposure to salinity strongly affected physiological parameters (salt influxes, water effluxes, immunity-related stress markers) and locomotor performance. Most of these effects were transient (water and salt fluxes, locomotor performance) once optimal conditions resumed (i.e., freshwater). Taken together, our results highlight the need to investigate whether exposure to environmental salinity can ultimately affect individual fitness and population persistence across taxa.

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