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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Oxygen limited thermal tolerance and performance in the lugworm Arenicola marina: A latitudinal comparison
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Oxygen limited thermal tolerance and performance in the lugworm Arenicola marina: A latitudinal comparison

机译：夜蛾Arenicola滨海中氧气受限的热耐受性和性能：横向比较

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摘要

Global warming trends in the marine environment currently lead to poleward shifts in the distribution of marine fauna along European coastlines indicating limited thermal tolerance of affected species and potential loss of their southernmost populations. The present study analyses the degree and limits of thermal specialisation in various populations of a key species of the intertidal zone, the lugworm Arenicola marina, which is exposed to highly fluctuating conditions in temperature, salinity, pH and oxygen levels during the seasonal as well as the tidal cycle. Thermal windows of tolerance and exercise performance were compared in three populations from the Russian White Sea, the German North Sea and the French Atlantic coast. Digging experiments in natural marine sediments quantified performance capacity and its optimum temperature. Temperature dependent ventilation and respiration were analysed in lugworms dwelling in artificial self-perfused burrows. Haemoglobin oxygen affinity was examined for an evaluation of population specific adaptations in the oxygen supply system. The results reflect a shift of both the thermal window and the thermal optimum towards higher temperatures with decreasing latitude. This shift was accompanied by a reduction of performance amplitude, i.e. the absolute number of digging periods, and a widening of the distance between critical temperatures, i.e. the total aerobic window of thermal tolerance.
机译：海洋环境的全球变暖趋势目前导致欧洲动物沿欧洲海岸线的分布发生极移，这表明受影响物种的耐热性有限，其最南端的种群可能遭受损失。本研究分析了潮间带关键物种潮虫Arenicola marina在各个种群中热专业化的程度和局限，该季节在季节以及季节期间暴露于温度，盐度，pH和氧气水平的高度波动条件下。潮汐周期。比较了俄罗斯白海，德国北海和法国大西洋沿岸的三个人群的耐受性和运动表现的热窗。在天然海洋沉积物中进行的挖掘实验量化了其性能及其最佳温度。分析了居住在人工自灌洞中的夜蛾的温度依赖性通风和呼吸。检查了血红蛋白的氧亲和力，以评估供氧系统中特定人群的适应性。结果表明，随着纬度的减小，热窗口和热最优值都向较高温度移动。这种变化伴随着性能幅度的减小，即挖掘周期的绝对数量，以及临界温度之间的距离的增大，即总的有氧热耐受窗。

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