Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14449 |
Multi-year net ecosystem carbon balance of a restored peatland reveals a return to carbon sink | |
Nugent, Kelly A.1; Strachan, Ian B.1; Strack, Maria2; Roulet, Nigel T.3; Rochefort, Line4 | |
2018-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:12页码:5751-5768 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Peatlands after drainage and extraction are large sources of carbon (C) to the atmosphere. Restoration, through re-wetting and revegetation, aims to return the C sink function by re-establishing conditions similar to that of an undrained peatland. However, the time needed to re-establish C sequestration is not well constrained due to the lack of multi-year measurements. We measured over 3 years the net ecosystem exchange of CO2 (NEE), methane (FCH4), and dissolved organic carbon (DOC) at a restored post-extraction peatland (RES) in southeast Canada (restored 14 years prior to the start of the study) and compared our observations to the C balance of an intact reference peatland (REF) that has a long-term continuous flux record and is in the same climate zone. Small but significant differences in winter respiration driven by temperature were mainly responsible for differences in cumulative NEE between years. Low growing season inter-annual variability was linked to constancy of the initial spring water table position, controlled by the blocked drainage ditches and the presence of water storage structures (bunds and pools). Half-hour FCH4 at RES was small except when Typha latifolia-invaded drainage ditches were in the tower footprint; this effect at the ecosystem level was small as ditches represent a minor fraction of RES. The restored peatland was an annual sink for CO2 (-90 +/- 18 g C m(-2) year(-1)), a source of CH4 (4.4 +/- 0.2 g C m(-2) year(-1)), and a source of DOC (6.9 +/- 2.2 g C m(-2) year(-1)), resulting in mean net ecosystem uptake of 78 +/- 17 g C m(-2) year(-1). Annual NEE at RES was most similar to wetter, more productive years at REF. Integrating structures to increase water retention, alongside re-establishing key species, have been effective at re-establishing the net C sink rate to that of an intact peatland. |
英文关键词 | carbon dioxide eddy covariance methane net ecosystem carbon balance peatland restoration |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449650600014 |
WOS关键词 | GREENHOUSE-GAS BALANCES ; EDDY COVARIANCE TECHNIQUE ; DISSOLVED ORGANIC-CARBON ; METHANE EMISSIONS ; DIOXIDE EXCHANGE ; INTERANNUAL VARIABILITY ; CO2 EXCHANGE ; ERIOPHORUM-VAGINATUM ; NORTHERN PEATLAND ; VASCULAR PLANTS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17475 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.McGill Univ, Dept Nat Resource Sci, Ste Anne De Bellevue, PQ, Canada; 2.Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON, Canada; 3.McGill Univ, Dept Geog, Montreal, PQ, Canada; 4.Univ Laval, Dept Plant Sci, Quebec City, PQ, Canada |
推荐引用方式 GB/T 7714 | Nugent, Kelly A.,Strachan, Ian B.,Strack, Maria,et al. Multi-year net ecosystem carbon balance of a restored peatland reveals a return to carbon sink[J]. GLOBAL CHANGE BIOLOGY,2018,24(12):5751-5768. |
APA | Nugent, Kelly A.,Strachan, Ian B.,Strack, Maria,Roulet, Nigel T.,&Rochefort, Line.(2018).Multi-year net ecosystem carbon balance of a restored peatland reveals a return to carbon sink.GLOBAL CHANGE BIOLOGY,24(12),5751-5768. |
MLA | Nugent, Kelly A.,et al."Multi-year net ecosystem carbon balance of a restored peatland reveals a return to carbon sink".GLOBAL CHANGE BIOLOGY 24.12(2018):5751-5768. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论