Kīlauea lava fuels phytoplankton bloom in the North Pacific Ocean

Kīlauea lava fuels phytoplankton bloom in the North Pacific Ocean
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卡劳埃亚熔岩助长了北太平洋浮游植物的繁殖

DOI:
10.1126/science.aax4767
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发表时间:
2019
期刊:
影响因子:
56.9
通讯作者:
DeLong, Edward F.
DeLong, Edward F.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wilson, Samuel T.;Hawco, Nicholas J.;Armbrust, E. Virginia;Barone, Benedetto;Björkman, Karin M.;Boysen, Angela K.;Burgos, Macarena;Burrell, Timothy J.;Casey, John R.;DeLong, Edward F.

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2018年6月至8月,夏威夷岛基拉韦厄火山喷发,将数百万立方米的熔岩注入北太平洋副热带环流营养贫乏的沃茨水域。受熔岩影响的海水的特点是金属和营养物浓度高,刺激了浮游植物的生长,形成了可被卫星探测到的大量叶绿素a羽流。化学和分子证据表明,尽管玄武岩熔岩中的氮含量可以忽略不计,但这种生物反应取决于出乎意料的高浓度硝酸盐。我们推测,高硝酸盐是由富含营养的深水沃茨浮力羽状物造成的,这些水柱是由大量熔岩进入海洋造成的。因此,这种大规模的海洋肥化是一个独特的扰动事件,揭示了海洋生态系统如何对外来营养物质的输入作出反应。
From June to August 2018, the eruption of Kīlauea volcano on the island of Hawai‘i injected millions of cubic meters of molten lava into the nutrient-poor waters of the North Pacific Subtropical Gyre. The lava-impacted seawater was characterized by high concentrations of metals and nutrients that stimulated phytoplankton growth, resulting in an extensive plume of chlorophyll a that was detectable by satellite. Chemical and molecular evidence revealed that this biological response hinged on unexpectedly high concentrations of nitrate, despite the negligible quantities of nitrogen in basaltic lava. We hypothesize that the high nitrate was caused by buoyant plumes of nutrient-rich deep waters created by the substantial input of lava into the ocean. This large-scale ocean fertilization was therefore a unique perturbation event that revealed how marine ecosystems respond to exogenous inputs of nutrients.
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