Skip to Main content Skip to Navigation
Journal articles

Impact of both desiccation and exposure to an emergent skin pathogen on transepidermal water exchange in the palmate newt Lissotriton helveticus

Thomas Wardziak 1 Émilien Luquet 2, 3 Sandrine Plénet 4 Jean-Paul Léna 1 Laurent Oxarango 5 Pierre Joly 2
1 Écophysiologie, Comportement, Conservation
LEHNA - Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés
4 Biodiversité des Écosystèmes Lotiques
LEHNA - Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés
5 Transpore
LTHE - Laboratoire d'étude des transferts en hydrologie et environnement
Abstract : Amphibians are the vertebrate group most affected by global change. Their highly permeable skin is involved in maintaining homeostasis (e.g. water and electrolyte equilibrium), which makes them particularly vulnerable to climate warming and skin pathogens. This study focused on the impacts of both desiccation (as a potential consequence of climate warming) and exposure to Batrachochytrium dendrobatidis (Bd), an emergent skin pathogen of amphibians. Bd causes chytridiomycosis, a lethal skin disease of amphibians, and is responsible for mass mortality events in several regions of the world. Because Bd colonizes the superficial layers of the epider- mis, it is assumed to affect water transfer across the skin. We investigated the behavioural pos- tures of the palmate newt Lissotriton helveticus expressed in response to desiccation and their influence on transepidermal water loss (TEWL) rate. We also investigated the effects of repeated 24 h exposure to Bd (i.e. every 4 d for 16 d) on the TEWL and ventral water absorption (VWA) rates of these newts. Our results suggest an efficient behavioural water-conserving mechanism, i.e. an 'S'-shaped posture associated with a restricted activity rate, not affected by repeated exposure to Bd. Similarly, TEWL was not significantly affected in exposed newts. VWA was significantly reduced after just 24 h exposure to Bd without modification until the end of the experiments. Our results suggest that Bd could rapidly inhibit rehydration of L. helveticus through fungal toxins and disrupt an essential function for survival.
Complete list of metadata

https://hal.archives-ouvertes.fr/halsde-00837856
Contributor : Nathalie Lyvet Connect in order to contact the contributor
Submitted on : Friday, November 26, 2021 - 2:31:16 PM
Last modification on : Friday, December 17, 2021 - 10:12:05 AM

File

d104p215.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Thomas Wardziak, Émilien Luquet, Sandrine Plénet, Jean-Paul Léna, Laurent Oxarango, et al.. Impact of both desiccation and exposure to an emergent skin pathogen on transepidermal water exchange in the palmate newt Lissotriton helveticus. Diseases of Aquatic Organisms, Inter Research, 2013, 104, pp.215-224. ⟨10.3354/dao02602⟩. ⟨halsde-00837856⟩

Share

Metrics

Les métriques sont temporairement indisponibles