干旱区生态环境知识资源中心(Arid): Chemical composition of soil organic carbon and aggregate stability along an elevation gradient in Helan Mountains, northwest China

Arid

DOI	10.1016/j.ecolind.2021.108228
	Chemical composition of soil organic carbon and aggregate stability along an elevation gradient in Helan Mountains, northwest China
	Wu, Mengyao; Pang, Danbo; Chen, Lin; Li, Xuebin; Liu, Lizhen; Liu, Bo; Li, Jingyao; Wang, Jifei; Ma, Longlong
通讯作者	Chen, L ; Li, XB (corresponding author), Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol, 489 Helanshan West Rd, Yinchuan 750021, Ningxia, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	131
英文摘要	Exploring the composition of soil organic carbon (SOC) and aggregate stability over a range of elevations is essential to evaluate the stability of SOC and the conversion of carbon source or sink of mountain ecosystems. However, information of those changes in mountain ecosystems in arid and semi-arid regions is still scarce to date. In this study, we estimated the response of SOC stability along elevation gradient (1,380-2,438 m) by combining physical protection of aggregates with chemical protection of SOC using a redundancy analysis method in the Helan Mountains, northwest China. Results showed that the dominated aggregates of Helan Mountains changed from microaggregates to macroaggregates with increasing elevation, and the mean weight diameter (MWD) in mid and high elevations (2,139-2,248 m) was significantly higher than that in low elevations (1,380-1,650 m). Solid-state 13C NMR spectra showed that O-alkyl C was the main chemical composition of SOC in the different elevations. Regression analysis indicated that with the increase of elevation, the proportion of aromatic C and aromaticity gradually increased, peaked at the mid elevation and subsequently decreased. These findings indicated that the soil structure and chemical composition of SOC are more stable in the mid elevation. Macroaggregates were positively correlated with O-alkyl C and aromatic C, while silt and clay were positively correlated with alkyl C, indicative of a lower decomposition rate of macroaggregates. The RDA analysis confirmed that aggregate stability were significant associated with SOC content and chemical composition such as O-alkyl C, indicating that the soil labile carbon pool was most related to affect aggregate stability. Our findings suggest that the Helan Mountains had a better soil structure and a more stable SOC chemical composition at mid elevation ranges. The soil structure at low elevations is sensitive to environment change; therefore, a reduction in anthropogenic disturbance is suggested for improved sustainability of the ecosystem.
英文关键词	Mountain ecosystem SOC Elevation gradient Aggregate stability 13C-CPMAS NMR
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000704534800001
WOS关键词	MICROBIAL COMMUNITY ; ALTITUDE GRADIENT ; FOREST SOILS ; MATTER ; ALPINE ; STOCKS ; STABILIZATION ; FRACTIONS ; CLIMATE ; LAND
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373803
作者单位	[Wu, Mengyao; Pang, Danbo; Chen, Lin; Li, Xuebin; Liu, Lizhen; Liu, Bo; Ma, Longlong] Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol, 489 Helanshan West Rd, Yinchuan 750021, Ningxia, Peoples R China; [Wu, Mengyao; Pang, Danbo; Chen, Lin; Li, Xuebin; Liu, Lizhen; Liu, Bo; Ma, Longlong] Ningxia Univ, Key Lab Restorat & Reconstruct Degraded Ecosyst N, Minist Educ, Yinchuan 750021, Ningxia, Peoples R China; [Wu, Mengyao] Ningxia Univ, Coll Agr, Yinchuan 750021, Ningxia, Peoples R China; [Li, Jingyao] Adm Ningxia Helan Mountains Natl Nat Reserve, Yinchuan 750021, Ningxia, Peoples R China; [Wang, Jifei] Ningxia Helan Mountains Forest Ecosyst Posit, Yinchuan 750021, Ningxia, Peoples R China
推荐引用方式 GB/T 7714	Wu, Mengyao,Pang, Danbo,Chen, Lin,et al. Chemical composition of soil organic carbon and aggregate stability along an elevation gradient in Helan Mountains, northwest China[J],2021,131.
APA	Wu, Mengyao.,Pang, Danbo.,Chen, Lin.,Li, Xuebin.,Liu, Lizhen.,...&Ma, Longlong.(2021).Chemical composition of soil organic carbon and aggregate stability along an elevation gradient in Helan Mountains, northwest China.ECOLOGICAL INDICATORS,131.
MLA	Wu, Mengyao,et al."Chemical composition of soil organic carbon and aggregate stability along an elevation gradient in Helan Mountains, northwest China".ECOLOGICAL INDICATORS 131(2021).