Acid-base physiology over tidal periods in the mussel Mytilus edulis: size and temperature are more influential than seawater pH.
Acid-base physiology over tidal periods in the mussel Mytilus edulis: size and temperature are more influential than seawater pH.
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贻贝潮汐期间的酸碱生理学：大小和温度比海水 pH 值的影响更大。
DOI：
10.1098/rspb.2018.2863
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Mangan S
中科院分区：
文献类型：
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作者：
Mangan S
迄今为止，海洋酸化研究通常使用稳定的开阔海洋pH值和CO2值来预测潮间带物种对未来气候情景的生理反应，很少有研究解释非生物条件的自然波动或潮汐周期中经常经历的交替出现和浸没时期。在这里，我们确定海水碳酸盐化学和相应的situhaemolymph酸碱反应超过真实的时间的两个群体的贻贝（紫贻贝）在潮汐周期，表明潮间带贻贝的经验，每天在出现酸中毒。使用这些现场数据parameterized实验工作，我们表明，空气温度和贻贝的大小强烈影响这种酸中毒，较大的贻贝在较高的温度下经历更大的酸中毒。事先浸泡在OA条件下（pHNBS7.7/pCO 2930 µatm）存在较小的交互作用，因此暴露于OA的大型贻贝在羽化开始时测得的血淋巴pH值较低。关键的是，贻贝在原地萌发过程中诱导的酸中毒（ΔpH约为0.8单位）大于实验OA诱导的酸中毒（ΔpH约为0.1单位）。了解环境波动如何影响生理在目前的情况下，是至关重要的，我们有能力预测未来的环境变化的关键海洋生物群的反应。
Ocean acidification (OA) studies to date have typically used stable open-ocean pH and CO2values to predict the physiological responses of intertidal species to future climate scenarios, with few studies accounting for natural fluctuations of abiotic conditions or the alternating periods of emersion and immersion routinely experienced during tidal cycles. Here, we determine seawater carbonate chemistry and the correspondingin situhaemolymph acid–base responses over real time for two populations of mussel (Mytilus edulis) during tidal cycles, demonstrating that intertidal mussels experience daily acidosis during emersion. Using these field data to parameterize experimental work we demonstrate that air temperature and mussel size strongly influence this acidosis, with larger mussels at higher temperatures experiencing greater acidosis. There was a small interactive effect of prior immersion in OA conditions (pHNBS7.7/pCO2930 µatm) such that the haemolymph pH measured at the start of emersion was lower in large mussels exposed to OA. Critically, the acidosis induced in mussels during emersionin situwas greater (ΔpH approximately 0.8 units) than that induced by experimental OA (ΔpH approximately 0.1 units). Understanding how environmental fluctuations influence physiology under current scenarios is critical to our ability to predict the responses of key marine biota to future environmental changes.