Transgenerational Effects of pCO2-Driven Ocean Acidification on Adult Mussels Mytilus chilensis Modulate Physiological Response to Multiple Stressors in Larvae

Frontiers in Physiology

Fabián J. Tapia³  Eduardo Tarifeño⁵  Marco A. Lardies⁶  Cristian A. Vargas⁸  Rosario Diaz⁸ 

[1] Aquatic Ecosystem Functioning Laboratory (LAFE), Environmental Sciences Center EULA, Universidad de Concepción, Concepción, Chile;Center for the Study of Multiple-Drivers on Marine Socio-Ecological Systems (MUSELS), Universidad de Concepción, Concepción, Chile;Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile;Department of Aquatic System, Faculty of Environmental Sciences, Universidad de Concepción, Concepción, Chile;Department of Zoology, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile;Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Santiago, Chile;Graduate Program in Oceanography, Department of Oceanography, Universidad de Concepción, Concepción, Chile;Millennium Institute of Oceanography, Universidad de Concepción, Concepción, Chile;

关键词: ocean acidification;    transgenerational plasticity;    multiple stressors;    Mytilus chilensis;    thermal effects;   

DOI  :  10.3389/fphys.2018.01349

来源: DOAJ

【 摘 要 】

The effect of CO2-driven ocean acidification (OA) on marine biota has been extensively studied mostly on a single stage of the life cycle. However, the cumulative and population-level response to this global stressor may be biased due to transgenerational effects and their impacts on physiological plasticity. In this study, we exposed adult mussels Mytilus chilensis undergoing gametogenesis to two pCO2 levels (550 and 1200 μatm) for 16 weeks, aiming to understand if prolonged exposure of reproductive individuals to OA can affect the performance of their offspring, which, in turn, were reared under multiple stressors (pCO2, temperature, and dissolved cadmium). Our results indicate dependence between the level of pCO2 of the broodstock (i.e., parental effect) and the performance of larval stages in terms of growth and physiological rates, as a single effect of temperature. While main effects of pCO2 and cadmium were observed for larval growth and ingestion rates, respectively, the combined exposure to stressors had antagonistic effects. Moreover, we found a suppression of feeding activity in post-spawning broodstock upon high pCO2 conditions. Nevertheless, this observation was not reflected in the final weight of the broodstock and oocyte diameter. Due to the ecological and socioeconomic importance of mussels’ species around the globe, the potential implications of maternal effects for the physiology, survival, and recruitment of larvae under combined global-change stressors warrant further investigation.

【 授权许可】

Unknown