Misinterpreting carbon accumulation rates in records from near-surface peat
Misinterpreting carbon accumulation rates in records from near-surface peat
复制标题
误解近地表泥炭记录中的碳积累率
作者：
D. Young;A. Baird;D. Charman;C. Evans;A. Gallego;Peter J Gill;P. Hughes;P. Morris;G. Swindles
泥炭地是全球重要的碳(C)储存库，记录着它们的碳积累速率如何随时间变化。最近，近地表泥炭已被用于评估当前土地利用方式对泥炭地碳积累速率的影响。然而，认为最近形成的泥炭的积累速率可以与更老、更深的泥炭的积累速率相比较的观点是错误的——持续分解意味着大多数新添加的物质不会成为长期碳储存的一部分。一段时间以来，古生态学家已经知道，在新近形成的泥炭中，明显的碳积累率很高是人为的，并采取措施加以解释。在这里，我们使用一个模型来展示人工制品是如何产生的。我们还证明，近地表泥炭中碳积累速率的增加不能用来推断泥炭地作为一个整体正在积累更多的碳——事实上，相反的情况可能是正确的，因为深层泥炭可以在形成后数百年的事件中被修改。我们的研究结果强调，在评估泥炭地最近的碳添加时需要谨慎，特别是因为这些解释可能被错误地用于为土地使用政策和决策提供信息。
Peatlands are globally important stores of carbon (C) that contain a record of how their rates of C accumulation have changed over time. Recently, near-surface peat has been used to assess the effect of current land use practices on C accumulation rates in peatlands. However, the notion that accumulation rates in recently formed peat can be compared to those from older, deeper, peat is mistaken – continued decomposition means that the majority of newly added material will not become part of the long-term C store. Palaeoecologists have known for some time that high apparent C accumulation rates in recently formed peat are an artefact and take steps to account for it. Here we show, using a model, how the artefact arises. We also demonstrate that increased C accumulation rates in near-surface peat cannot be used to infer that a peatland as a whole is accumulating more C – in fact the reverse can be true because deep peat can be modified by events hundreds of years after it was formed. Our findings highlight that care is needed when evaluating recent C addition to peatlands especially because these interpretations could be wrongly used to inform land use policy and decisions.
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影响因子：
18.3
作者：
Marrs, R. H.;Marsland, E-L;Chiverrell, R. C.
通讯作者：
Chiverrell, R. C.
影响因子：
4.9
作者：
Charman, D. J.;Beilman, D. W.;Zhao, Y.
通讯作者：
Zhao, Y.
影响因子：
1.1
作者：
Billett, M. F.;Charman, D. J.;Rose, R.
通讯作者：
Rose, R.
影响因子：
4
作者：
Charman, Dan J.;Amesbury, Matthew J.;Mauquoy, Dmitri
通讯作者：
Mauquoy, Dmitri