Adaptive carbon export response to warming in the Sargasso Sea.

Adaptive carbon export response to warming in the Sargasso Sea.
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马尾藻海气候变暖的适应性碳输出反应。

DOI:
10.1038/s41467-022-28842-3
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发表时间:
2022-03-08
影响因子:
16.6
通讯作者:
Tanioka T
Tanioka T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Lomas MW;Bates NR;Johnson RJ;Steinberg DK;Tanioka T

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海洋生态系统模型预测,变暖和海洋表层分层增加将引发一系列生态系统事件,减少颗粒碳向海洋内部的生物输出。我们提出了一个近三十年的时间序列,记录了海洋变暖和营养物质减少的生物反应,其中颗粒碳出口保持,与预期相反。碳输出是通过浮游植物群落变化的组合来维持的,以有利于具有高细胞碳磷比的蓝藻和增强的浅层磷再循环,从而提高养分利用效率。这些结果表明,表层海洋生态系统可能比目前地球生态系统模型中设想的更敏感,更迅速地适应水文系统的变化,对海洋碳吸收产生积极影响。海洋生物区系固碳的能力被认为受到气候变化的负面影响。在这里,作者使用马尾藻海的时间序列数据来表明生物过程可以缓冲这些负面影响。
Ocean ecosystem models predict that warming and increased surface ocean stratification will trigger a series of ecosystem events, reducing the biological export of particulate carbon to the ocean interior. We present a nearly three-decade time series from the open ocean that documents a biological response to ocean warming and nutrient reductions wherein particulate carbon export is maintained, counter to expectations. Carbon export is maintained through a combination of phytoplankton community change to favor cyanobacteria with high cellular carbon-to-phosphorus ratios and enhanced shallow phosphorus recycling leading to increased nutrient use efficiency. These results suggest that surface ocean ecosystems may be more responsive and adapt more rapidly to changes in the hydrographic system than is currently envisioned in earth ecosystem models, with positive consequences for ocean carbon uptake. The ability of the ocean’s biota to sequester carbon is thought to be negatively affected by climate change. Here the authors use time-series data in the Sargasso Sea to show that biotic processes can buffer against these negative impacts.
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发表时间: 2020-10-16
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