Compensation of ocean acidification effects in Arctic phytoplankton assemblages
Compensation of ocean acidification effects in Arctic phytoplankton assemblages
复制标题
DOI：
10.1038/s41558-018-0142-9
复制
发表时间：
2018-06-01
影响因子：
30.7
通讯作者：
Rost, Bjorn
中科院分区：
文献类型：
--
作者：
Hoppe, Clara Jule Marie;Wolf, Klara K. E.;Rost, Bjorn
维持大型渔业并促进全球生物地球化学循环的北极和亚北极大陆架海对正在发生的海洋酸化（即由于人为二氧化碳排放而导致海水pH值下降）特别敏感。然而，关于海洋酸化对天然浮游植物组合的影响的资料很少，而这些浮游植物是高纬度水域的主要初级生产者。在这里，我们表明，在不同的实验设计中，沿海北极和亚北极初级生产在很大范围内的光照和温度水平下对海洋酸化不敏感。在10种二氧化碳控制处理中，仅观察到一次（温度低于2℃）海洋酸化对初级生产力的显著影响，物种组成的变化仅发生了三次（与特定实验条件无关）。这些结果表明，浮游植物具有较高的补偿环境变异性的能力，这可以从环境历史、耐受性范围和优势浮游植物种内多样性来理解。
The Arctic and subarctic shelf seas, which sustain large fisheries and contribute to global biogeochemical cycling, are particularly sensitive to ongoing ocean acidification (that is, decreasing seawater pH due to anthropogenic CO2 emissions). Yet, little information is available on the effects of ocean acidification on natural phytoplankton assemblages, which are the main primary producers in high-latitude waters. Here we show that coastal Arctic and subarctic primary production is largely insensitive to ocean acidification over a large range of light and temperature levels in different experimental designs. Out of ten CO2-manipulation treatments, significant ocean acidification effects on primary productivity were observed only once (at temperatures below 2 degrees C), and shifts in the species composition occurred only three times (without correlation to specific experimental conditions). These results imply a high capacity to compensate for environmental variability, which can be understood in light of the environmental history, tolerance ranges and intraspecific diversity of the dominant phytoplankton species.