气候变化领域集成服务门户(CCPortal): Shallow peat is most vulnerable to high peat burn severity during wildfire

CCPortal

DOI	10.1088/1748-9326/aba7e8
	Shallow peat is most vulnerable to high peat burn severity during wildfire
	Wilkinson S.L.; Tekatch A.M.; Markle C.E.; Moore P.A.; Waddington J.M.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Peatlands typically act as carbon sinks, however, increasing wildfire severity and annual area burned may challenge this carbon sink status. Whilst most peat resistance to wildfire and drought research is based on deep peatlands that rarely lose their water table below the peat profile, shallow peatlands and peat deposits may be most vulnerable to high peat burn severity and extensive carbon loss. To examine the role of pre-fire peat depth on peat burn severity, we measured the depth of burn (DOB) in peat of varying depths (0.1–1.6 m) within a rock barrens landscape. We found that DOB (0–0.4 m) decreased with increasing pre-fire peat depth, and that there was a strong correlation between the percent of the profile that burned and pre-fire peat depth. Breakpoint analysis indicates a threshold depth of 0.66 m where deeper peat deposits experienced little impact of wildfire, whereas shallower peat typically experienced high peat burn severity (median percent burned = 2.2 and 65.1, respectively). This threshold also corresponded to the loss of the water table in some nearby unburned peatlands, where water table drawdown rates were greater in shallower peat. We suggest that peat depth may control peat burn severity through feedbacks that regulate water table drawdown. As such, we argue that the identification of a critical peat depth threshold could have important implications for wildfire management and peatland restoration aiming to protect vulnerable carbon stores. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	Ecohydrology; Organic soil; Peatland; Rock barrens; Smouldering; Sphagnum; Wildfire management
语种	英语
scopus关键词	Carbon; Deposits; Fires; Groundwater; Water levels; Wetlands; Annual area burned; Breakpoint analysis; Burn Severity; Strong correlation; Threshold depths; Water table drawdown; Wildfire management; Wildfire severity; Peat; carbon sink; drawdown; drought; identification method; land management; peat; peatland; research work; vulnerability; water table; wildfire; Sphagnum
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153645
作者单位	School of Earth, Environment and Society, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada
推荐引用方式 GB/T 7714	Wilkinson S.L.,Tekatch A.M.,Markle C.E.,et al. Shallow peat is most vulnerable to high peat burn severity during wildfire[J],2020,15(10).
APA	Wilkinson S.L.,Tekatch A.M.,Markle C.E.,Moore P.A.,&Waddington J.M..(2020).Shallow peat is most vulnerable to high peat burn severity during wildfire.Environmental Research Letters,15(10).
MLA	Wilkinson S.L.,et al."Shallow peat is most vulnerable to high peat burn severity during wildfire".Environmental Research Letters 15.10(2020).