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Variations of salinity during reproduction and development affect ontogenetic trajectories in a coastal amphibian
2024
Lorrain-Soligon, Léa | Bizon, Timothé | Robin, Frédéric | Jankovic, Marko | Brischoux, François | Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) ; La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Ligue pour la Protection des Oiseaux (LPO)
International audience | Although coastal ecosystems are naturally submitted to temporal variations of salinity, salinization has been increasing over time threatening coastal biodiversity. Species that exploit such habitats can thus be exposed to brackish water at different life stages. However, the impacts of variations of salinity on wildlife remain poorly understood. This is particularly true for coastal amphibians, due to the strong dependency of early life stages (embryos and larvae) on aquatic environments. In order to investigate the effect of salinity during egg laying and embryonic and larval development of coastal amphibians, we used a full-factorial design to expose reproductive adults, eggs, and larvae of coastal spined toads (Bufo spinosus) to fresh (0 g.l⁻¹) or brackish water (4 g.l⁻¹). At egg laying, we evaluated parental investment in reproduction. During embryonic and larval development, we assessed effects on survival, development, and growth. We highlighted strong effects of environmental salinity on reproduction (reduced egg laying time, marginally reduced egg size, and reduced investment in reproduction). Responses to salinity were highly dependent on the developmental stages of exposure (stronger effects when individuals were exposed during embryonic development). These effects carried over when exposure occurred at egg laying or during embryonic development, highlighting the importance of the environmental conditions during early life on ontogenetic trajectories. We also highlighted partial compensation when individuals were transferred back to freshwater. Whether the magnitude of these responses can allow coastal biodiversity to overcome the observed detrimental effects of salinization remain to be assessed.
Show more [+] Less [-]On the design and use of a fresh water sampling apparatus to concentrate and extract organic micropollutants on a continuous basis
1991
Turcotte, J. (Universite Laval, Quebec (Canada). Faculte des Sciences et de Genie, Departement de Chimie) | Cote, J.E. | Fraser, E.
Antioxidant systems and lipoperoxidation as biomarkers in the freshwater bivalve, Unio sp.
1995
Doyotte, A. (Universite de Metz (France). Centre des Sciences de l'Environnement) | Cossu, C. | Jacquin, M.C. | Vasseur, P.
[Bioindication of water quality by aquatic macrophytes: role of phosphorus [an example: a study of rivers in Alsace (France)]]
1995
Robach, F. (Institut de Botanique, Strasbourg (France). Laboratoire de Botanique et d'Ecologie Vegetale) | Merlin, S. | Rolland, T. | Tremolieres, M.
Nitrate reductase activity in aquatic plants as an indicator of ammoniacal nitrogen contamination
1995
Rolland, T. (Institut de Botanique, Strasbourg (France). Laboratoire de Botanique et d'Ecologie Vegetale) | Robach, F. | Tremolieres, M. | Dester, S.
Macrophyte indices to assess stream water quality: preliminary proposals from the group of scientific interest "macrophytes of inland waters"
1995
Haury, J. (Institut National de la Recherche Agronomique, Rennes (France). Centre de Rennes, Ecologie et Physiologie des Poissons) | Peltre, M.C. | Muller, S. | Tremolieres, M. | Barbe, J. | Dutartre, A. | Guerlesquin, M.
Biotoxitel. Biological water pollution sensor by monitoring algae photosynthetic activity
1995
Ory, J.M. (Centre de Recherche en Automatisme de Nancy, Vandoeuvre (France)) | Jacques, F.