Reduced pH sea water disrupts chemo-responsive behaviour in an intertidal crustacean
Reduced pH sea water disrupts chemo-responsive behaviour in an intertidal crustacean
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DOI：
10.1016/j.jembe.2011.11.013
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发表时间：
2012-01-31
影响因子：
2
通讯作者：
Briffa, Mark
中科院分区：
文献类型：
--
作者：
de la Haye, Kate L.;Spicer, John I.;Briffa, Mark
化学感受是许多水生动物感知环境的一项关键活动，因此对这一过程的非生物干扰可能会对个体的生存和健康以及物种相互作用产生严重影响。寄居蟹会受到它们栖息的潮间带岩石池中水的pH值的周期性降低的影响。持续的海洋酸化和/或二氧化碳从地质储存场泄漏以及沿海涌升事件可能会进一步加剧这种减少。在这里，我们测试的化学感官反应的寄居蟹Pagurus bernhardus（林奈）的食物气味降低pH值条件下（pH值（NBS）= 6.80）。酸化气味对它的吸引力没有影响，这表明线索没有永久性的降解;然而，海水的pH值确实影响了螃蟹的反应。寄居蟹保持和测试在pH值降低的海水中有较低的触角轻弹率（'嗅'在十足类动物的反应），是不太成功的定位气味源，并表现出整体下降的运动活动相比，在未经处理的海水。对其血淋巴的分析显示，pH值降低处理组中氯离子浓度（[Cl-]）更高，表明离子调节受到干扰;然而，[Cl-]与运动活动之间没有相关性，表明对化学感受有特定影响。这项研究表明，甲壳类动物的化学反应可能会受到自然发生的pH值波动和未来海洋pH值变化的影响。（c）2011 Elsevier B. V.版权所有。
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 bernhardus (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. (c) 2011 Elsevier B.V. All rights reserved.