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首页> 美国卫生研究院文献>Biology >Combined Effects of Acute Temperature Change and Elevated pCO2 on the Metabolic Rates and Hypoxia Tolerances of Clearnose Skate (Rostaraja eglanteria) Summer Flounder (Paralichthys dentatus) and Thorny Skate (Amblyraja radiata)
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Combined Effects of Acute Temperature Change and Elevated pCO2 on the Metabolic Rates and Hypoxia Tolerances of Clearnose Skate (Rostaraja eglanteria) Summer Flounder (Paralichthys dentatus) and Thorny Skate (Amblyraja radiata)

机译：急性温度变化和pCO2升高对明胶滑板（Rostaraja eglanteria）夏季比目鱼（Paralichthys dentatus）和棘手滑板（Amblyraja radiata）的代谢率和耐缺氧性的综合影响

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Understanding how rising temperatures, ocean acidification, and hypoxia affect the performance of coastal fishes is essential to predicting species-specific responses to climate change. Although a population’s habitat influences physiological performance, little work has explicitly examined the multi-stressor responses of species from habitats differing in natural variability. Here, clearnose skate (Rostaraja eglanteria) and summer flounder (Paralichthys dentatus) from mid-Atlantic estuaries, and thorny skate (Amblyraja radiata) from the Gulf of Maine, were acutely exposed to current and projected temperatures (20, 24, or 28 °C; 22 or 30 °C; and 9, 13, or 15 °C, respectively) and acidification conditions (pH 7.8 or 7.4). We tested metabolic rates and hypoxia tolerance using intermittent-flow respirometry. All three species exhibited increases in standard metabolic rate under an 8 °C temperature increase (Q10 of 1.71, 1.07, and 2.56, respectively), although this was most pronounced in the thorny skate. At the lowest test temperature and under the low pH treatment, all three species exhibited significant increases in standard metabolic rate (44–105%; p < 0.05) and decreases in hypoxia tolerance (60–84% increases in critical oxygen pressure; p < 0.05). This study demonstrates the interactive effects of increasing temperature and changing ocean carbonate chemistry are species-specific, the implications of which should be considered within the context of habitat.
机译：了解温度升高，海洋酸化和低氧如何影响沿海鱼类的表现对于预测物种对气候变化的特定反应至关重要。尽管人口的栖息地会影响生理性能，但很少有工作明确研究物种在自然变异性不同的栖息地的多应激反应。在这里，来自大西洋中部河口的Clearnose滑冰（Rostaraja eglanteria）和夏季比目鱼（Paralichthys dentatus），以及来自缅因湾的棘手滑冰（Amblyraja radiata）都暴露于当前和预计的温度（20、24或28° C; 22或30°C;和9、13或15°C）和酸化条件（pH 7.8或7.4）。我们使用间歇流呼吸测定法测试了代谢率和低氧耐受性。在温度升高8°C时，这三个物种的标准代谢率均增加（Q10分别为1.71、1.07和2.56），尽管这在棘手的溜冰鞋中最为明显。在最低测试温度和低pH处理下，这三个物种均显示出标准代谢率显着提高（44–105％； p <0.05），并且耐缺氧性降低（临界氧压升高60–84％； p < 0.05）。这项研究表明，温度升高和海洋碳酸盐化学变化所产生的交互作用是特定于物种的，其影响应在栖息地范围内加以考虑。

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