Abstract. Direct land to atmosphere carbon exchange has been the primary focus in previous studies of peatland disturbance and subsequent restoration. However, loss of carbon via the fluvial pathway is a significant term in peatland carbon budgets and requires consideration to assess the overall impact of restoration measures. This study aimed to determine the effect of peatland land management regime on aquatic carbon concentrations and fluxes in an area within the UK’s largest tract of blanket bog, the Flow Country of N. Scotland. Three sub catchments were selected to represent peatland land management types: non-drained, drained and restoration (achieved through drain blocking and tree-removal). Water samples were collected on a fortnightly basis from September 2008 to August 2010 at six sampling sites, one located upstream and one downstream within each sub catchment. Significant differences in DOC concentrations were observed between the upstream non-drained catchment and the drained catchments, and there was considerable variation in the speciation of aquatic carbon (DOC, DIC, POC, CO₂ and CH₄) across the monitoring sites. Aquatic carbon fluxes were highest from the drained catchments and lowest from the non-drained catchments at 25.6 and 10.4 g C m⁻² yr⁻¹, respectively, with variability between the upstream and downstream sites within each catchment very low. It is clear from both the aquatic carbon concentration and flux data that drainage has had a profound impact on the hydrological and biogeochemical functioning of the peatland. In the restoration catchment, carbon export varied considerably, from 23.3 g C m⁻² yr⁻¹ at the upper site to 11.4 g C m⁻² yr⁻¹ at the lower site, largely due to differences in runoff generation. As a result of this hydrological variability it is difficult to make definitive conclusions about the impact of restoration on carbon fluxes and further monitoring is needed to corroborate the longer term effects.

中文翻译：

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泥炭地管理对水生碳浓度和通量的影响

摘要。在以前的泥炭地扰动和随后的恢复研究中，直接地对大气的碳交换一直是主要的研究重点。但是，通过河流途径的碳损失在泥炭地碳预算中是一个重要术语，需要考虑评估恢复措施的总体影响。这项研究旨在确定泥炭地土地管理制度对英国最大的毯子沼泽地（N. Scotland流域）内某个地区的水生碳浓度和通量的影响。选择了三个子集水区来代表泥炭地土地管理类型：非排水，排水和恢复（通过排水阻塞和树木清除来实现）。从2008年9月至2010年8月，每两个星期从六个采样点采集水样，每个子流域内一个位于上游，一个下游。上游非流域和流域之间的DOC浓度存在显着差异，水生碳的形态（DOC，DIC，POC，CO₂和CH ₄）。来自流域的水生碳通量最高，分别为25.6 g C m ^-2  yr ^-1和非流域的最低，每个流域内上游和下游站点之间的变异性非常低。从水生碳浓度和通量数据都可以清楚地看出，排水对泥炭地的水文和生物地球化学功能产生了深远的影响。在恢复流域，碳出口变化很大，从上部站点的23.3 g C m ^-2  yr ^-1到11.4 g C m ^-2  yr ^-1在较低的地点，主要是由于径流产生的差异。由于这种水文变异性，很难就恢复对碳通量的影响作出明确的结论，需要进一步监测以证实长期影响。