Adaptation of a globally important coccolithophore to ocean warming and acidification
Adaptation of a globally important coccolithophore to ocean warming and acidification
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DOI：
10.1038/nclimate2379
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发表时间：
2014-11
影响因子：
30.7
通讯作者：
Lothar Schlüter;Kai T. Lohbeck;M. Gutowska;J. Gröger;U. Riebesell;T. Reusch
中科院分区：
文献类型：
--
作者：
Lothar Schlüter;Kai T. Lohbeck;M. Gutowska;J. Gröger;U. Riebesell;T. Reusch
虽然海洋变暖和酸化被认为是当今海洋的两大人为扰动，但我们对海洋浮游植物如何通过进化变化作出反应知之甚少。我们测试了全球重要的浮游植物Emiliania huxleyi对海洋变暖和海洋酸化的适应性。温度适应的发生与海洋酸化程度无关。生长率高达16%，更高的人口适应了一年的变暖时，在他们的耐热上限测定。颗粒无机（PIC）和有机（POC）碳的生产恢复到今天的海洋条件下的值，由于适应性进化，并分别高101%和55%，在综合变暖和酸化，分别比非适应性控制。细胞也进化到更小的尺寸，同时即使在CO2升高的情况下，它们也恢复了最初的PIC：POC比率。在颗石藻生长，方解石和生物量的生产，细胞大小和元素组成的观察到的变化表明浮游植物的性能在未来的海洋进化过程的重要性。
Although ocean warming and acidification are recognized as two major anthropogenic perturbations of today’s oceans we know very little about how marine phytoplankton may respond via evolutionary change. We tested for adaptation to ocean warming in combination with ocean acidification in the globally important phytoplankton speciesEmiliania huxleyi. Temperature adaptation occurred independently of ocean acidification levels. Growth rates were up to 16% higher in populations adapted for one year to warming when assayed at their upper thermal tolerance limit. Particulate inorganic (PIC) and organic (POC) carbon production was restored to values under present-day ocean conditions, owing to adaptive evolution, and were 101% and 55% higher under combined warming and acidification, respectively, than in non-adapted controls. Cells also evolved to a smaller size while they recovered their initial PIC:POC ratio even under elevated CO2. The observed changes in coccolithophore growth, calcite and biomass production, cell size and elemental composition demonstrate the importance of evolutionary processes for phytoplankton performance in a future ocean.