Phytoplankton calcification in a high-CO2 world
Phytoplankton calcification in a high-CO2 world
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DOI：
10.1126/science.1154122
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发表时间：
2008-04-18
期刊：
影响因子：
56.9
通讯作者：
Boessenkool, Karin P.
中科院分区：
文献类型：
--
作者：
Iglesias-Rodriguez, M. Debora;Halloran, Paul R.;Boessenkool, Karin P.
大气二氧化碳分压升高导致的海洋酸化被广泛认为会减少海洋生物的钙化作用。从中生代中期开始，颗石藻一直是世界海洋中主要的碳酸钙生产者，如今约占海洋碳酸钙总产量的三分之一。在此，我们提供了实验室证据，表明在高二氧化碳分压下，颗石藻物种赫氏艾密里藻的钙化作用和净初级生产力显著增加。来自深海的实地证据与这些实验室结论相符，表明在过去220年中，颗石平均质量增加了40%。我们的研究结果表明，颗石藻已经对大气二氧化碳分压的升高做出反应，并可能会继续做出反应，这对未来海洋和气候的生物地球化学建模具有重要意义。
Ocean acidification in response to rising atmospheric CO2 partial pressures is widely expected to reduce calcification by marine organisms. From the mid- Mesozoic, coccolithophores have been major calcium carbonate producers in the world's oceans, today accounting for about a third of the total marine CaCO3 production. Here, we present laboratory evidence that calcification and net primary production in the coccolithophore species Emiliania huxleyi are significantly increased by high CO2 partial pressures. Field evidence from the deep ocean is consistent with these laboratory conclusions, indicating that over the past 220 years there has been a 40% increase in average coccolith mass. Our findings show that coccolithophores are already responding and will probably continue to respond to rising atmospheric CO2 partial pressures, which has important implications for biogeochemical modeling of future oceans and climate.