Emissions of methane from northern peatlands: a review of management impacts and implications for future management options.
Emissions of methane from northern peatlands: a review of management impacts and implications for future management options.
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DOI：
10.1002/ece3.2469
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发表时间：
2016-10
影响因子：
2.6
通讯作者：
Smith P
中科院分区：
文献类型：
--
作者：
Abdalla M;Hastings A;Truu J;Espenberg M;Mander Ü;Smith P
北方泥炭地是大气甲烷（CH 4）的重要来源。然而，未受干扰的泥炭地的管理，以及干扰泥炭地的恢复，将改变CH 4与大气的交换。本系统综述和Meta分析的目的是整理和分析已发表的研究，以提高我们对控制CH 4排放的因素以及管理对北方（纬度40°至70°N）泥炭地气体通量的影响的理解。该分析包括87项研究，报告了在186个地点测量的甲烷排放量，涵盖不同的国家，泥炭地类型和管理系统。结果表明，天然北方泥炭地的甲烷排放量变化很大，平均值的95%置信区间为7.6-15.7 g C m−2年−1，中位数为3.3-6.3 g C m−2年−1。总体年平均值（平均值±标准差）为12 ± 21 g C m−2年−1，沼泽生态系统的排放量最高。天然泥炭地的甲烷排放量主要受地下水位（WT）深度，植物群落组成，土壤pH值。虽然平均年气温本身不是一个很好的预测CH 4排放量，温度，植物群落覆盖，WT深度和土壤pH值之间的相互作用是很重要的。根据气候变化的短期预测，这些复杂的相互作用将是北方泥炭地CH 4排放的主要决定因素。排水显著（p <0.05）减少了CH 4向大气的排放，平均减少了84%.恢复排水泥炭地再湿润或植被/再湿润增加甲烷排放量平均为46%，比原来的premanagement甲烷通量。然而，为了充分评估管理实践对高纬度泥炭地温室气体平衡的净影响，需要考虑净生态系统交换（NEE）和碳输出。
Northern peatlands constitute a significant source of atmospheric methane (CH 4). However, management of undisturbed peatlands, as well as the restoration of disturbed peatlands, will alter the exchange of CH 4 with the atmosphere. The aim of this systematic review and meta‐analysis was to collate and analyze published studies to improve our understanding of the factors that control CH 4 emissions and the impacts of management on the gas flux from northern (latitude 40° to 70°N) peatlands. The analysis includes a total of 87 studies reporting measurements of CH 4 emissions taken at 186 sites covering different countries, peatland types, and management systems. Results show that CH 4 emissions from natural northern peatlands are highly variable with a 95% CI of 7.6–15.7 g C m−2 year−1 for the mean and 3.3–6.3 g C m−2 year−1 for the median. The overall annual average (mean ± SD) is 12 ± 21 g C m−2 year−1 with the highest emissions from fen ecosystems. Methane emissions from natural peatlands are mainly controlled by water table (WT) depth, plant community composition, and soil pH. Although mean annual air temperature is not a good predictor of CH 4 emissions by itself, the interaction between temperature, plant community cover, WT depth, and soil pH is important. According to short‐term forecasts of climate change, these complex interactions will be the main determinant of CH 4 emissions from northern peatlands. Drainage significantly (p < .05) reduces CH 4 emissions to the atmosphere, on average by 84%. Restoration of drained peatlands by rewetting or vegetation/rewetting increases CH 4 emissions on average by 46% compared to the original premanagement CH 4 fluxes. However, to fully evaluate the net effect of management practice on the greenhouse gas balance from high latitude peatlands, both net ecosystem exchange (NEE) and carbon exports need to be considered.
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影响因子：
30.7
作者：
Bain, Paul G.;Hornsey, Matthew J.;Jeffries, Carla
通讯作者：
Jeffries, Carla
影响因子：
5.2
作者：
Baird, AJ;Beckwith, CW;Waddington, JM
通讯作者：
Waddington, JM
DOI：
10.1029/2008gm000826
发表时间：
2009-01-01
期刊：
CARBON CYCLING IN NORTHERN PEATLANDS
影响因子：
--
作者：
Baird, A. J.;Belyea, L. R.;Morris, P. J.
通讯作者：
Morris, P. J.
影响因子：
9.7
作者：
Aerts, R;Ludwig, F
通讯作者：
Ludwig, F
影响因子：
5.8
作者：
Bates, Douglas;Maechler, Martin;Walker, Steven C.
通讯作者：
Walker, Steven C.