National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; International Research Center for Marine Biosciences, Shanghai Ocean University, Ministry of Science and Technology, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, China.
Department of Biology, Norwegian University of Science and Technology, Høgskoleringen 5, 7491 Trondheim, Norway.
Mar Pollut Bull. 2019 Dec;149:110538. doi: 10.1016/j.marpolbul.2019.110538. Epub 2019 Aug 24.
Apart from ocean acidification, hypoxia is another stressor to marine organisms, especially those in coastal waters. Their interactive effects of elevated CO and hypoxia on the physiological energetics in mussel Mytilus edulis were evaluated. Mussels were exposed to three pH levels (8.1, 7.7, 7.3) at two dissolved oxygen levels (6 and 2 mg L) and clearance rate, absorption efficiency, respiration rate, excretion rate, scope for growth and O: N ratio were measured during a14-day exposure. After exposure, all parameters (except excretion rate) were significantly reduced under low pH and hypoxic conditions, whereas excretion rate was significantly increased. Additive effects of low pH and hypoxia were evident for all parameters and low pH appeared to elicit a stronger effect than hypoxia (2.0 mg L). Overall, hypoxia can aggravate the effects of acidification on the physiological energetics of mussels, and their populations may be diminished by these stressors.
除了海洋酸化，低氧也是海洋生物的另一个压力源，尤其是那些在沿海水域的生物。评估了升高的 CO 和低氧对贻贝 Mytilus edulis 生理能量学的相互作用影响。贻贝暴露于三种 pH 值（8.1、7.7、7.3）和两种溶解氧水平（6 和 2mg/L）下，并在 14 天暴露期间测量了清除率、吸收效率、呼吸率、排泄率、生长范围和 O:N 比。暴露后，所有参数（排泄率除外）在低 pH 和低氧条件下显著降低，而排泄率显著增加。低 pH 和低氧对所有参数都有相加效应，低 pH 的影响似乎比低氧更强（2.0mg/L）。总的来说，低氧会加剧酸化对贻贝生理能量学的影响，这些压力源可能会使它们的种群减少。
