气候变化领域集成服务门户(CCPortal): Drivers of greenhouse gas emissions from standing dead trees in ghost forests

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DOI	10.1007/s10533-021-00797-5
	Drivers of greenhouse gas emissions from standing dead trees in ghost forests
	Martinez M.; Ardón M.
发表日期	2021
ISSN	1682563
起始页码	471
结束页码	488
卷号	154 期号:3
英文摘要	Coastal freshwater forested wetlands are rapidly transitioning from forest to marsh, leaving behind many standing dead trees (snags) in areas often called ‘ghost forests’. Snags can act as conduits for soil produced greenhouse gases (GHG) and can also be sources as they decompose. Thus, snags have the potential to contribute GHGs to the atmosphere, but emissions are not well understood. We assessed GHG emissions (carbon dioxide—CO2, methane—CH4, and nitrous oxide—N2O) from snags and soils in five ghost forests along a salinity gradient on the coast of North Carolina, USA. Mean (± SE) soil GHG fluxes (416 ± 44 mg CO2 m−2 h−1, 5.9 ± 1.9 mg CH4 m−2 h−1, and 0.1 ± 0.06 mg N2O m−2 h−1) were ~ 4 times greater than mean snag GHGs (116 ± 15 mg CO2 m−2 h−1, 0.3 ± 0.09 mg CH4 m−2 h−1, and 0.04 ± 0.009 mg N2O m−2 h−1). Hydrological conditions and salinity influenced soil GHG fluxes between the two field campaigns, but snags were less predictable and more variable. Snag and soil CO2/N2O fluxes were influenced by similar environmental parameters. The drivers for soil and snag CH4 however, were often not the same and at times oppositely correlated. Our results illustrate the need to further research into the drivers and importance of GHG emissions from snags, and the need to include tree stems into ecosystem GHG research. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
英文关键词	Carbon dioxide (CO2); Freshwater; Ghost forests; Methane (CH4); Nitrous oxide (N2O); Wetlands
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184583
作者单位	Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC 27695, United States
推荐引用方式 GB/T 7714	Martinez M.,Ardón M.. Drivers of greenhouse gas emissions from standing dead trees in ghost forests[J],2021,154(3).
APA	Martinez M.,&Ardón M..(2021).Drivers of greenhouse gas emissions from standing dead trees in ghost forests.Biogeochemistry,154(3).
MLA	Martinez M.,et al."Drivers of greenhouse gas emissions from standing dead trees in ghost forests".Biogeochemistry 154.3(2021).