Effects of ocean acidification on the metabolic rates of three species of bivalve from southern coast of China
Effects of ocean acidification on the metabolic rates of three species of bivalve from southern coast of China
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DOI：
10.1007/s00343-012-1067-1
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发表时间：
2012-03
影响因子：
--
通讯作者：
Wenguang Liu;Maoxian He
中科院分区：
文献类型：
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作者：
Wenguang Liu;Maoxian He
海洋吸收人为二氧化碳导致海水pH值下降，这一过程被称为“海洋酸化”。合浦珠母贝（Pinctada fucata）、华贵扇贝（Chlamys nobilis）和绿唇贻贝（Perna viridis）是沿着重要的经济和生态物种。我们评估了海水酸化对这三个物种的清除，呼吸和排泄率的影响。在pH 8.1（对照）、7.7或7.4的海水中饲养海牛。P在pH 7.7时清除率最高。fucata和C.诺比利和P.绿色的pH值对P. fucataandP.绿色的相反，在pH7.4 ℃时，呼吸速率显著降低。贵族对于所有物种，pH 7.4下的排泄率均显着低于pH 8.1。结果表明，海水pH值的降低可能会影响这些双壳类的代谢过程（食物摄入，氧气消耗和氨排泄）。不同物种对海水酸化的反应不同。需要进一步的研究来证明这种影响的确切机制，并评估这些双壳类对未来酸化海洋的适应性。
Oceanic uptake of anthropogenic carbon dioxide results in a decrease in seawater pH, a process known as “ocean acidification”. The pearl oysterPinctada fucata, the noble scallopChlamys nobilis, and the green-lipped musselPerna viridisare species of economic and ecological importance along the southern coast of China. We evaluated the effects of seawater acidification on clearance, respiration, and excretion rates in these three species. The ammals were reared in seawater at pH 8.1 (control), 7.7, or 7.4. The clearance rate was highest at pH 7.7 forP. fucataand at pH 8.1 forC. nobilisandP. viridis. The pH had little effect on the respiration rate ofP. fucataandP. viridis. In contrast, the respiration rate was significantly lower at pH 7.4 inC. nobilis. The excretion rate was significantly lower at pH 7.4 than pH 8.1 for all species. The results indicate that the reduction in seawater pH likely affected the metabolic process (food intake, oxygen consumption, and ammonia excretion) of these bivalves. Different species respond differently to seawater acidification. Further studies are needed to demonstrate the exact mechamsms for this effect and evaluate adaptability of these bivalves to future acidified oceans.