Variations of salinity during reproduction and development affect ontogenetic trajectories in a coastal amphibian.

Autor: Lorrain-Soligon L; UMR 7372: Centre d'Etudes Biologiques de Chizé (CEBC) - CNRS - La Rochelle Université, 405 route de Prissé la Charrière, 79360, Villiers en Bois, France. llorrain.lea@gmail.com., Bizon T; UMR 7372: Centre d'Etudes Biologiques de Chizé (CEBC) - CNRS - La Rochelle Université, 405 route de Prissé la Charrière, 79360, Villiers en Bois, France., Robin F; LPO France, Fonderies Royales, 17300, Rochefort, France.; Réserve naturelle du marais d'Yves LPO, Ferme de la belle espérance, 17340, Yves, France., Jankovic M; Réserve naturelle du marais d'Yves LPO, Ferme de la belle espérance, 17340, Yves, France., Brischoux F; UMR 7372: Centre d'Etudes Biologiques de Chizé (CEBC) - CNRS - La Rochelle Université, 405 route de Prissé la Charrière, 79360, Villiers en Bois, France.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 Feb; Vol. 31 (8), pp. 11735-11748. Date of Electronic Publication: 2024 Jan 15.
DOI: 10.1007/s11356-024-31886-1
Abstrakt: 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.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
Externí odkaz: