Global climate changes induce substantial alterations in the marine system, including ocean acidification (OA), desalination and warming of surface seawater. Here, we examined the combined effects of OA and reduced salinity under different temperatures on the growth and photosynthesis of the diatom . After having been acclimated to 2 CO concentrations (400 μatm, 1000 μatm) and 2 salinity levels (20 psu, 30 psu) at temperature levels of 10 °C and 20 °C, the diatom showed enhanced growth rate at the lowered salinity and elevated CO irrespective of the temperature. The OA treatment increased the net photosynthetic rate and biogenic silica (Bsi) contents. Increasing the temperature from 10 to 20 °C raised the net photosynthetic rate by over twofold. The elevated CO increased the net and gross photosynthetic rates by 20%–40% and by 16%–32%, respectively, with the higher enhancement observed at the higher levels of salinity and temperature. Our results imply that OA and desalination along with warming to the levels tested can enhance 's competitiveness in coastal phytoplankton communities under influence of future climate changes.

中文翻译：

---

海洋酸化和海水淡化增加了黄海沿岸硅藻中肋骨条藻的生长和光合作用

全球气候变化导致海洋系统发生重大变化，包括海洋酸化（OA）、海水淡化和表层海水变暖。在这里，我们研究了不同温度下 OA 和降低盐度对硅藻生长和光合作用的综合影响。在 10 °C 和 20 °C 的温度水平下适应 2 个 CO 浓度（400 μatm、1000 μatm）和 2 个盐度水平（20 psu、30 psu）后，硅藻在降低盐度和升高盐度时表现出增强的生长速率。 CO 与温度无关。 OA处理增加了净光合速率和生物二氧化硅（Bsi）含量。将温度从 10°C 提高到 20°C 可使净光合速率提高两倍以上。 CO 升高使净光合速率和总光合速率分别增加 20%–40% 和 16%–32%，在较高盐度和温度水平下观察到的增强程度更高。我们的结果表明，OA 和海水淡化以及变暖至测试水平可以增强沿海浮游植物群落在未来气候变化影响下的竞争力。