Heart beat rate adaptations to varying salinity of two intertidal Mediterranean bivalves: The invasive Brachidontes pharaonis and the native Mytilaster minimus
Heart beat rate adaptations to varying salinity of two intertidal Mediterranean bivalves: The invasive Brachidontes pharaonis and the native Mytilaster minimus
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DOI：
10.1080/11250001003657360
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
de Pirro, M.
中科院分区：
文献类型：
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作者：
Sara, G.;de Pirro, M.
在现场和实验室中研究了法老腕齿（一种入侵的小西波斯物种）和迷你Mytilaster（一种地中海本地物种）的心率（HBR）随盐度值从微咸（20）到极端高盐（75）变化的变化。这两个物种对不同盐度表现出不同的反应，在不同盐度调查的群体和来自不同环境的群体之间观察到明显的HBR差异。本地物种适应狭窄的盐度变化，如在地中海浅水中观察到的，在盐度略高于37（在37-45范围内）时显示出压力的迹象。另一方面，入侵物种只有在盐度超过45时才表现出明显的应激迹象，即使在高盐条件下（即盐度= 75）也表现出心脏活动。这些结果表明，小塞普西亚物种具有入侵整个地中海盆地大部分过渡环境的潜力。因此，我们强调有必要将法老长柄齿纲列入评估外来物种在地中海区域实际和潜在扩散的所有沿海监测方案。
Changes in heart beat rates (HBR) of Brachidontes pharaonis (an invasive Lessepsian species) and Mytilaster minimus (a native Mediterranean species) in response to changes in salinity values from brackish (20) to extreme hyper-saline (75) were investigated both in situ and in the laboratory. The two species displayed different responses to varying salinity, with clear differences in HBR observed between groups investigated at different salinities and between groups originating from different environments. The native species, adapted to narrow salinity changes as those observed in the superficial waters of the Mediterranean Sea, showed signs of stress at salinities slightly above 37 (in the range 37-45). On the other hand, the invasive species displayed clear signs of stress only at salinities over 45 and exhibited heart activity even under hyper-saline conditions (i.e. salinity = 75). These results indicate that the Lessepsian species has the potential to invade most of the transitional environments across the entire Mediterranean basin. We therefore stress the need of including Brachidontes pharaonis in all coastal monitoring programmes assessing the actual and potential spreading of alien species in the Mediterranean region.