期刊
ICES JOURNAL OF MARINE SCIENCE
卷 79, 期 10, 页码 2614-2629出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsac195
关键词
combined effects; Crassostrea gigas; intergenerational carryover; life stage; ocean acidification; ocean warming; oyster
资金
- Ocean Acidification Program of the French Foundation for Research on Biodiversity (FRB)
- French Ministere de la Transition Ecologique
- LabexMER Frontiers in marine research
This study found that reducing pH can slow down oyster growth rate and activate the serotonin system, but increasing temperature can attenuate these effects. pH had no effect on reproduction at any temperature, and there were no intergenerational carryover effects.
Ocean acidification and warming (OAW) are pressing contemporary issues affecting marine life and specifically calcifying organisms. Here, we investigated the direct effects of OAW on life-history traits of the Pacific oyster Crassostrea gigas, the most cultivated bivalve species worldwide. We also tested whether parental conditioning history shaped the phenotypic characters of their progenies (intergenerational carryover effects). Adult oysters and their offspring were exposed to two temperatures (18 degrees C, +3 degrees C) under ambient pH conditions or under an end-of-century acidification scenario (-0.33 pH unit). In adults, we monitored standard biometric and reproductive parameters, stress response by quantifying neuroendocrine metabolites and gamete quality. In larvae, we measured hatching rate, size, biochemical quality, and behavior. We found that reducing pH reduced growth rate and activated the serotonin system, but increasing temperature attenuated these effects. There was no effect of pH on reproduction at either temperature, and no intergenerational carryover effects. Larval characteristics were similar between treatments, regardless of parental conditioning history. Thus, the Pacific oyster seems robust to changes in pH, and increasing temperature is not an aggravating factor. We emphasize that the use of neuroendocrine indicators holds promise for revealing sublethal impacts of environmental changes.
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