| 北方泥炭地甲烷排放研究: 综述 |
| |
| 作者姓名： | D. Y. F. LAI |
| |
| 作者单位： | Department of Geography,McGill University,805 Sherbrooke Street West,Montreal,Quebec,H3A 2K6 (Canada |
| |
| 基金项目： | *1 by the Canadian Carbon Program (Fluxnet-Canada Research Network) funded by the Canadian Foundation for Climate and Atmospheric Sciences (CFCAS), and a Natural Sciences and Engineering Research Councilof Canada (NSERC) Discovery Grant to Nigel Roulet. |
| |
| 摘 要： | Northern peatlands store a large amount of carbon and play a significant role in the global carbon cycle. Owing to the presence of waterlogged and anaerobic conditions, peatlands are typically a source of methane (CH4), a very potent greenhouse gas. This paper reviews the key mechanisms of peatland CH4 production, consumption and transport and the major environmental and biotic controls on peatland CH4 emissions. The advantages and disadvantages of micrometeorological and chamber methods in measuring CH4 fluxes from northern peatlands are also discussed. The magnitude of CH4 flux varies considerably among peatland types (bogs and fens) and microtopographic locations (hummocks and hollows). Some anthropogenic activities including forestry, peat harvesting and industrial emission of sulphur dioxide can cause a reduction in CH4 release from northern peatlands. Further research should be conducted to investigate the in fluence of plant growth forms on CH4 flux from northern peatlands, determine the water table threshold at which plant production in peatlands enhances CH4 release, and quantify peatland CH4 exchange at plant community level with a higher temporal resolution using automatic chambers.
|
| 关 键 词： | 甲烷排放量 泥炭地 动力学 二氧化硫排放量 全球碳循环 甲烷通量 工厂生产 地下水位 |
| 收稿时间： | 16 April 2009 |
| 修稿时间： | 11 May 2009. |
Methane dynamics in northern peatlands: A review |
| |
| D. Y. F. LAI.Methane dynamics in northern peatlands: A review[J].Pedosphere,2009,19(4):409-421. |
| |
| Authors: | D Y F LAI |
| |
| Institution: | aDepartment of Geography, McGill University, 805 Sherbrooke Street West, Montreal, Quebec, H3A 2K6 (Canada) |
| |
| Abstract: | Northern peatlands store a large amount of carbon and play a significant role in the global carbon cycle. Owing to the presence of waterlogged and anaerobic conditions, peatlands are typically a source of methane (CH4), a very potent greenhouse gas. This paper reviews the key mechanisms of peatland CH4 production, consumption and transport and the major environmental and biotic controls on peatland CH4 emissions. The advantages and disadvantages of micrometeoro- logical and chamber methods in measuring CH4 fluxes from northern peatlands are also discussed. The magnitude of CH4 flux varies considerably among peatland types (bogs and fens) and microtopographic locations (hummocks and hollows). Some anthropogenic activities including forestry, peat harvesting and industrial emission of sulphur dioxide can cause a reduction in CH4 release from northern peatlands. Further research should be conducted to investigate the influence of plant growth forms on CH4 flux from northern peatlands, determine the water table threshold at which plant production in peatlands enhances CH4 release, and quantify peatland CH4 exchange at plant community level with a higher temporal resolution using automatic chambers. |
| |
| Keywords: | global carbon cycle greenhouse gas methane oxidation methanogenesis methanotrophy |
| 本文献已被 维普 万方数据 ScienceDirect 等数据库收录！ |
| 点击此处可从《土壤圈》浏览原始摘要信息 |
| 点击此处可从《土壤圈》下载免费的PDF全文 |
|
