Carbon balance of UK peatlands: current state of knowledge and future research challenges
Carbon balance of UK peatlands: current state of knowledge and future research challenges
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DOI：
10.3354/cr00903
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发表时间：
2010-01-01
期刊：
影响因子：
1.1
通讯作者：
Rose, R.
中科院分区：
文献类型：
--
作者：
Billett, M. F.;Charman, D. J.;Rose, R.
泥炭地碳(C)的保留量和继续从大气中提取和储存碳的能力不仅对英国陆地碳清单很重要，而且对一系列生态系统服务、景观价值以及接近英国陆地面积15%的生态和水文都很重要。在这里，我们回顾了关于英国泥炭地碳平衡的知识现状，这些研究不仅强调了进行良好的通量测量的重要性，而且还强调了不同通量项的时空变异性，这些项表征了一系列自然和人为过程和威胁影响的景观。我们的数据强调了衡量(或准确估计)泥炭地C预算所有组成部分的重要性。我们强调了水生途径的作用，并建议通量比之前认为的要高。我们还将几个英国泥炭地的当代碳平衡与使用泥炭岩芯测量的历史碳积累速率进行了比较，从而为今天的测量及其自然的年际变化提供了一个长期的背景。两个地点的同期测量表明，泥炭岩芯的电流累积速率(-56到-72gCm(-2)yr(-1))处于过去150年来的较低端(-35到-209gCm(-2)yr(-1))。最后，我们强调了当前在知识方面的重大差距，确定了不确定性水平较高的地方，并强调了如果我们要改进对未来几十年泥炭地碳平衡变化的衡量和预测，需要解决的研究挑战。
The retention of peatland carbon (C) and the ability to continue to draw down and store C from the atmosphere is not only important for the UK terrestrial carbon inventory, but also for a range of ecosystem services, the landscape value and the ecology and hydrology of similar to 15% of the land area of the UK. Here we review the current state of knowledge on the C balance of UK peatlands using several studies which highlight not only the importance of making good flux measurements, but also the spatial and temporal variability of different flux terms that characterise a landscape affected by a range of natural and anthropogenic processes and threats. Our data emphasise the importance of measuring (or accurately estimating) all components of the peatland C budget. We highlight the role of the aquatic pathway and suggest that fluxes are higher than previously thought. We also compare the contemporary C balance of several UK peatlands with historical rates of C accumulation measured using peat cores, thus providing a long-term context for present-day measurements and their natural year-on-year variability. Contemporary measurements from 2 sites suggest that current accumulation rates (-56 to -72 g C m(-2) yr(-1)) are at the lower end of those seen over the last 150 yr in peat cores (-35 to -209 g C m(-2) yr(-1)). Finally, we highlight significant current gaps in knowledge and identify where levels of uncertainty are high, as well as emphasise the research challenges that need to be addressed if we are to improve the measurement and prediction of change in the peatland C balance over future decades.