气候变化领域集成服务门户(CCPortal): Seasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees

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DOI	10.1038/s41467-019-12976-y
	Seasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees
	Machacova K.; Vainio E.; Urban O.; Pihlatie M.
发表日期	2019
ISSN	20411723
卷号	10 期号:1
英文摘要	The role of trees in the nitrous oxide (N2O) balance of boreal forests has been neglected despite evidence suggesting their substantial contribution. We measured seasonal changes in N2O fluxes from soil and stems of boreal trees in Finland, showing clear seasonality in stem N2O flux following tree physiological activity, particularly processes of CO2 uptake and release. Stem N2O emissions peak during the vegetation season, decrease rapidly in October, and remain low but significant to the annual totals during winter dormancy. Trees growing on dry soils even turn to consumption of N2O from the atmosphere during dormancy, thereby reducing their overall N2O emissions. At an annual scale, pine, spruce and birch are net N2O sources, with spruce being the strongest emitter. Boreal trees thus markedly contribute to the seasonal dynamics of ecosystem N2O exchange, and their species-specific contribution should be included into forest emission inventories., The Author(s).
scopus关键词	carbon; nitrous oxide; carbon dioxide; methane; nitrous oxide; boreal forest; dormancy; gas exchange; nitrous oxide; physiology; seasonal variation; seasonality; stem; air temperature; Article; boreal tree; denitrification; environmental parameters; evapotranspiration; forest floor flux; gas chromatography; growing season; mycorrhiza; nitrous oxide emission; nonhuman; photosynthesis; photosynthetically active radiation; physiology; pine; rhizosphere; seasonal variation; soil temperature; soil water content; stem flux; tree; ultraviolet radiation; vegetation; winter dormancy; atmosphere; chemistry; ecosystem; Finland; metabolism; plant stem; season; soil; taiga; Finland; Picea; Atmosphere; Carbon Dioxide; Ecosystem; Finland; Methane; Nitrous Oxide; Plant Stems; Seasons; Soil; Taiga; Trees
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176286
作者单位	Global Change Research Institute of the Czech Academy of Sciences, Belidla 4a, Brno, CZ-60300, Czech Republic; Environmental Soil Science, Department of Agricultural Sciences, University of Helsinki, P.O.Box 56, Helsinki, FI-00014, Finland; Institute for Atmospheric and Earth System Research/Forest Sciences, University of Helsinki, P.O.Box 27, Helsinki, FI-00014, Finland; Viikki Plant Science Centre (ViPS), University of Helsinki, P.O.Box 56, Helsinki, FI-00014, Finland
推荐引用方式 GB/T 7714	Machacova K.,Vainio E.,Urban O.,et al. Seasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees[J],2019,10(1).
APA	Machacova K.,Vainio E.,Urban O.,&Pihlatie M..(2019).Seasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees.Nature Communications,10(1).
MLA	Machacova K.,et al."Seasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees".Nature Communications 10.1(2019).