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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Reduced pH sea water disrupts chemo-responsive behaviour in an intertidal crustacean
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Reduced pH sea water disrupts chemo-responsive behaviour in an intertidal crustacean

机译：pH值降低的海水会破坏潮间甲壳动物的化学反应行为

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Chemoreception is a key activity by which many aquatic animals perceive their environment, and therefore abiotic disruptions to this process could have serious impacts on the survival and fitness of individuals, and on species interactions. Hermit crabs are subject to cyclical reductions in the pH of the water in the intertidal rock pools that they inhabit. Such reductions may be further exacerbated by ongoing ocean acidification and/ or leakage of carbon dioxide from geological storage sites and coastal upwelling events. Here we test the chemo-sensory responses of the hermit crab Pagurus bemhardus (Linnaeus) to a food odour under reduced pH conditions (pH_(NBs) = 6.80). Acidifying the odour had no effect on its attractiveness indicating no permanent degradation of the cue; however, the pH of the sea water did affect the crabs' responses. Hermit crabs kept and tested in reduced pH sea water had lower antennular flicking rates (the 'sniffing' response in decapods); were less successful in locating the odour source, and showed an overall decline in locomotory activity compared to those in untreated sea water. Analysis of their haemolymph revealed a greater concentration of chloride ions ([Cl~-]) in the reduced pH treatment group, suggesting iono-regulatory disruption; however, there was no correlation between [Cl~-] and locomotory activity, suggesting a specific effect on chemoreception. This study shows that the chemo-responsiveness of a crustacean may be influenced by both naturally occurring pH fluctuations and future anthropogenically-induced changes in ocean pH.
机译：化学感受力是许多水生动物感知环境的一项关键活动，因此，对该过程的非生物破坏可能会对个体的生存和适应以及物种之间的相互作用产生严重影响。寄居蟹在其居住的潮间带岩池中水的pH值会周期性降低。持续的海洋酸化和/或二氧化碳从地质储藏地点和沿海上升事件的泄漏可能会进一步加剧这种减少。在这里，我们测试了寄居蟹Pagurus bemhardus（Linnaeus）在降低的pH条件下（pH_（NBs）= 6.80）对食物气味的化学感应响应。酸化气味不会对其吸引力产生影响，表明该提示不会永久降解。然而，海水的pH值确实影响了螃蟹的反应。在降低的pH值的海水中饲养和测试的寄居蟹具有较低的瓣膜甩动率（十足动物的“嗅探”响应）。与未处理的海水相比，定位气味源的成功率较低，并且运动活性总体下降。对他们的血淋巴进行分析后发现，pH降低的治疗组中氯离子（[Cl〜-]）的浓度较高，表明离子调节被破坏。然而，[Cl〜-]与运动活性之间没有相关性，表明对化学感受性有特定作用。这项研究表明，甲壳动物的化学反应能力可能会受到自然发生的pH波动和未来人为引起的海洋pH变化的影响。

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