Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany.
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany.
Mar Pollut Bull. 2014 Mar 15;80(1-2):59-70. doi: 10.1016/j.marpolbul.2014.01.050. Epub 2014 Feb 12.
The sensitivity of copepods to ocean acidification (OA) and warming may increase with time, however, studies >10 days and on synergistic effects are rare. We therefore incubated late copepodites and females of two dominant Arctic species, Calanus glacialis and Calanushyperboreus, at 0 °C at 390 and 3000 μatm pCO₂ for several months in fall/winter 2010. Respiration rates, body mass and mortality in both species and life stages did not change with pCO₂. To detect synergistic effects, in 2011 C. hyperboreus females were kept at different pCO₂ and temperatures (0, 5, 10 °C). Incubation at 10°C induced sublethal stress, which might have overruled effects of pCO₂. At 5 °C and 3000 μatm, body carbon was significantly lowest indicating a synergistic effect. The copepods, thus, can tolerate pCO₂ predicted for a future ocean, but in combination with increasing temperatures they could be sensitive to OA.
桡足类对海洋酸化（OA）和变暖的敏感性可能随时间增加，然而，>10 天的研究和协同作用研究很少。因此，我们在 2010 年秋季/冬季，将两种主要的北极物种——Glacialis 和 hyperboreus 的桡足幼体和雌性，在 0°C 和 390 和 3000 μatm pCO₂下孵育数月。两种物种和生命阶段的呼吸率、体重和死亡率均不受 pCO₂的影响。为了检测协同作用，2011 年将 hyperboreus 雌性保持在不同的 pCO₂和温度（0、5、10°C）下。在 10°C 下孵育会导致亚致死应激，这可能会使 pCO₂的影响失效。在 5°C 和 3000 μatm 下，身体碳含量显著最低，表明存在协同作用。因此，桡足类可以耐受未来海洋预测的 pCO₂，但与温度升高结合时，它们可能对 OA 敏感。
