Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China.
Department of Biology, Norwegian University of Science and Technology, Realfagbygget, Høgskoleringen 5, NO-7491, Trondheim, Norway.
Mar Environ Res. 2019 Mar;145:73-80. doi: 10.1016/j.marenvres.2019.02.011. Epub 2019 Feb 26.
Transgenerational effects of multiple stressors on marine organisms are emerging environmental themes. We thus experimentally tested for transgenerational effects of seawater acidification and hypoxia on the early development traits of the mussel Mytilus edulis. Fertilization rate, embryo deformity rate, and larval shell length were negatively impacted by acidification, while hypoxia had little effect except for increasing deformity rates under control pH conditions. Offspring from low pH/O parents were less negatively affected by low pH/O conditions than offspring from control parents; however, low pH/O conditions still negatively affected developmental traits in offspring from acclimated parents compared to control seawater conditions. Our results demonstrate that experimental seawater acidification and hypoxia can adversely affect early developmental traits of M. edulis and that parental exposure can only partially alleviate these impacts. If experimental observations hold true in nature, it is unlikely that parental exposure will confer larval tolerance to ocean acidification for M. edulis.
海洋生物受到多种胁迫的跨代效应是新兴的环境主题。因此，我们通过实验测试了海水酸化和缺氧对贻贝 Mytilus edulis 早期发育特征的跨代效应。受精率、胚胎畸形率和幼虫壳长受到酸化的负面影响，而缺氧除了在对照 pH 条件下增加畸形率外，影响甚微。来自低 pH/O 亲代的后代受低 pH/O 条件的负面影响小于来自对照亲代的后代；然而，与对照海水条件相比，适应亲代的低 pH/O 条件仍然对后代的发育特征产生负面影响。我们的结果表明，实验海水酸化和缺氧会对贻贝的早期发育特征产生不利影响，而亲代暴露只能部分缓解这些影响。如果实验观察结果在自然界中成立，那么亲代暴露不太可能赋予贻贝幼虫对海洋酸化的耐受性。
