Persistence of soil organic matter as an ecosystem property
Persistence of soil organic matter as an ecosystem property
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DOI：
10.1038/nature10386
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发表时间：
2011-10-06
期刊：
影响因子：
64.8
通讯作者：
Trumbore, Susan E.
中科院分区：
文献类型：
--
作者：
Schmidt, Michael W. I.;Torn, Margaret S.;Trumbore, Susan E.
在全球范围内，土壤有机质（SOM）的碳含量是大气或陆地植被的三倍多。然而，为什么有些土壤有机质能存留数千年，而另一些则容易分解，这在很大程度上仍然是未知的——这限制了我们预测土壤如何应对气候变化的能力。最近的分析和实验进展表明，分子结构本身并不能控制SOM的稳定性：事实上，环境和生物控制占主导地位。在这里，我们提出了将这种理解纳入新一代实验和土壤碳模型的方法，从而改进SOM对全球变暖响应的预测。
Globally, soil organic matter (SOM) contains more than three times as much carbon as either the atmosphere or terrestrial vegetation. Yet it remains largely unknown why some SOM persists for millennia whereas other SOM decomposes readily-and this limits our ability to predict how soils will respond to climate change. Recent analytical and experimental advances have demonstrated that molecular structure alone does not control SOM stability: in fact, environmental and biological controls predominate. Here we propose ways to include this understanding in a new generation of experiments and soil carbon models, thereby improving predictions of the SOM response to global warming.