干旱区生态环境知识资源中心(Arid): Moisture Fluctuations Modulate Abiotic and Biotic Limitations of H-2 Soil Uptake

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DOI	10.1029/2021GB006987
	Moisture Fluctuations Modulate Abiotic and Biotic Limitations of H-2 Soil Uptake
	Bertagni, Matteo B.; Paulot, Fabien; Porporato, Amilcare
通讯作者	Bertagni, MB (corresponding author)，Princeton Univ, High Meadows Environm Inst, Princeton, NJ 08544 USA.
来源期刊	GLOBAL BIOGEOCHEMICAL CYCLES
ISSN	0886-6236
EISSN	1944-9224
出版年	2021
卷号	35 期号:12
英文摘要	Soil uptake by H-2-oxidizing bacteria is the main sink of the global hydrogen cycle, accounting for nearly 80% of the atmospheric H-2 consumption. Although the H-2 uptake is strongly influenced by soil moisture, little attention has been paid to coherently couple the water and hydrogen dynamics in soils. Toward this goal, we improve the mechanistic representation of the H-2 uptake as a function of soil moisture and highlight the role of the moisture temporal fluctuations on the biotic consumption of H-2. The results show that, due to the strongly nonlinear relationship between soil moisture and H-2 uptake, addressing the dry-wet sequences is necessary to characterize the H-2 uptake in semi-arid regions correctly. From novel analytical relationships validated with field data, we also infer the biotic and abiotic limitations in the global soil H-2 uptake. It is shown that, diffusion generally limits the uptake in humid temperate and tropical regions, while biotic limitations tend to occur in very arid or cold soils. Finally, we discuss the implications that climate change may have on the H-2 soil sink.
英文关键词	hydrogen soil uptake soil moisture bacteria gas diffusion
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000735888800009
WOS关键词	WATER-CONTROLLED ECOSYSTEMS ; ATMOSPHERIC HYDROGEN ; HYDROLOGIC PROCESSES ; MOLECULAR-HYDROGEN ; GAS DIFFUSIVITY ; ACTIVE-ROLE ; MODEL ; STRESS ; CARBON ; MICROORGANISMS
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375824
作者单位	[Bertagni, Matteo B.; Porporato, Amilcare] Princeton Univ, High Meadows Environm Inst, Princeton, NJ 08544 USA; [Paulot, Fabien] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA; [Porporato, Amilcare] Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA
推荐引用方式 GB/T 7714	Bertagni, Matteo B.,Paulot, Fabien,Porporato, Amilcare. Moisture Fluctuations Modulate Abiotic and Biotic Limitations of H-2 Soil Uptake[J],2021,35(12).
APA	Bertagni, Matteo B.,Paulot, Fabien,&Porporato, Amilcare.(2021).Moisture Fluctuations Modulate Abiotic and Biotic Limitations of H-2 Soil Uptake.GLOBAL BIOGEOCHEMICAL CYCLES,35(12).
MLA	Bertagni, Matteo B.,et al."Moisture Fluctuations Modulate Abiotic and Biotic Limitations of H-2 Soil Uptake".GLOBAL BIOGEOCHEMICAL CYCLES 35.12(2021).