Soil organic matter molecular composition with long-term detrital alterations is controlled by site-specific forest properties

doi:10.1111/gcb.16456

	Soil organic matter molecular composition with long-term detrital alterations is controlled by site-specific forest properties
	Castaneda-Gomez, Laura ; Lajtha, Kate 1; Bowden, Richard 2; Jauhar, Fathima Nahidha Mohammed ; Jia, Juan 3; Feng, Xiaojuan3 ; Simpson, Myrna J.
	2023
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	29 期号:1 页码:243-259
摘要	Forest ecosystems are important global soil carbon (C) reservoirs, but their capacity to sequester C is susceptible to climate change factors that alter the quantity and quality of C inputs. To better understand forest soil C responses to altered C inputs, we integrated three molecular composition published data sets of soil organic matter (SOM) and soil microbial communities for mineral soils after 20 years of detrital input and removal treatments in two deciduous forests: Bousson Forest (BF), Harvard Forest (HF), and a coniferous forest: H.J. Andrews Forest (HJA). Soil C turnover times were estimated from radiocarbon measurements and compared with the molecular-level data (based on nuclear magnetic resonance and specific analysis of plant- and microbial-derived compounds) to better understand how ecosystem properties control soil C biogeochemistry and dynamics. Doubled aboveground litter additions did not increase soil C for any of the forests studied likely due to long-term soil priming. The degree of SOM decomposition was higher for bacteria-dominated sites with higher nitrogen (N) availability while lower for the N-poor coniferous forest. Litter exclusions significantly decreased soil C, increased SOM decomposition state, and led to the adaptation of the microbial communities to changes in available substrates. Finally, although aboveground litter determined soil C dynamics and its molecular composition in the coniferous forest (HJA), belowground litter appeared to be more influential in broadleaf deciduous forests (BH and HF). This synthesis demonstrates that inherent ecosystem properties regulate how soil C dynamics change with litter manipulations at the molecular-level. Across the forests studied, 20 years of litter additions did not enhance soil C content, whereas litter reductions negatively impacted soil C concentrations. These results indicate that soil C biogeochemistry at these temperate forests is highly sensitive to changes in litter deposition, which are a product of environmental change drivers.
关键词	cutin DIRT lignin nuclear magnetic resonance phospholipid fatty acids radiocarbon soil carbon suberin
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.16456
收录类别	SCI
语种	英语
WOS关键词	MICROBIAL COMMUNITY STRUCTURE ; PACIFIC SILVER FIR ; ELEVATED CO2 ; LEAF-LITTER ; CARBON STORAGE ; ABOVEGROUND LITTER ; AGRICULTURAL SOIL ; NUTRIENT RELEASE ; LIGNIN OXIDATION ; N FERTILIZATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000868622200001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	Natural Sciences and Engineering Research Council of Canada
作者邮箱	myrna.simpson@utoronto.ca
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/29092
专题	植被与环境变化国家重点实验室
作者单位	1.[Castaneda-Gomez, Laura; Jauhar, Fathima Nahidha Mohammed; Simpson, Myrna J.] Univ Toronto, Dept Phys & Environm Sci, Toronto, ON, Canada 2.Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA 3.Allegheny Coll, Dept Environm Sci & Sustainabil, Meadville, PA 16335 USA 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Castaneda-Gomez, Laura,Lajtha, Kate,Bowden, Richard,et al. Soil organic matter molecular composition with long-term detrital alterations is controlled by site-specific forest properties[J]. GLOBAL CHANGE BIOLOGY,2023,29(1):243-259.
APA	Castaneda-Gomez, Laura.,Lajtha, Kate.,Bowden, Richard.,Jauhar, Fathima Nahidha Mohammed.,Jia, Juan.,...&Simpson, Myrna J..(2023).Soil organic matter molecular composition with long-term detrital alterations is controlled by site-specific forest properties.GLOBAL CHANGE BIOLOGY,29(1),243-259.
MLA	Castaneda-Gomez, Laura,et al."Soil organic matter molecular composition with long-term detrital alterations is controlled by site-specific forest properties".GLOBAL CHANGE BIOLOGY 29.1(2023):243-259.

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