气候变化领域集成服务门户(CCPortal): Examining soil organic carbon in the mountainous peat swamps of the Zoige Plateau in China's Qinghai-Tibet Plateau

CCPortal

DOI	10.1111/sum.12895
	Examining soil organic carbon in the mountainous peat swamps of the Zoige Plateau in China's Qinghai-Tibet Plateau
	Zhang, Zhiwei; Zhao, Cheng-Zhang; Bai, Xuqian; Li, Qun; Ma, Min
发表日期	2023
ISSN	0266-0032
EISSN	1475-2743
起始页码	757
结束页码	770
卷号	39 期号:2
英文摘要	Mountainous peatlands are one of the most important terrestrial ecosystems for carbon storage and play an important role in the global carbon cycle. An insight into the carbon cycle of peat swamps located in mountainous regions can be obtained by studying the distribution of soil organic carbon (SOC) and its relationships with environmental factors. This study focused on the development conditions of peat swamps in the Gahai wetlands, located on the Zoige Plateau, China, with four different altitudinal gradients as experimental sample sites. The distribution of SOC and its relationship with environmental factors were analysed through vegetation surveys and a generalized additive model (GAM). The results show that with increasing altitude, soil temperature decreased while the soil pH and bulk density initially decreased then increased. On the contrary, the topographic wetness index (TWI), SOC content, above-ground biomass and litter count initially increased then decreased. The SOC content of the 0-30 cm soil layer was in the range 226-330 g center dot kg(-1) (coefficient of variation (CV) = 21.4%), and the 30-60 cm layer was 178-257 g center dot kg(-1) (CV = 17.5%) and was significantly correlated (p < .05) with above-ground biomass and litter count. Meanwhile, the SOC content in the 60-90 cm soil layer was in the range 132-167 g center dot kg(-1) (CV = 9.2%) with a significant correlation (p < .05) with soil temperature, pH, bulk density and topographic moisture index. The study showed that the SOC content exhibited more pronounced spatial patterns with increasing altitude, with the peak value in the shallow soil layer appearing in lower elevation areas compared with the deep soil layer. The level of variation changed from medium to low, reflecting the stable mechanism for maintaining SOC within the heterogeneous peat swamp environment.
关键词	elevation generalized additive model peat swamp soil organic carbon Zoige Plateau
英文关键词	TERRESTRIAL ECOSYSTEMS; STOCKS; DECOMPOSITION; TEMPERATURE; GRASSLANDS; HOLOCENE; FLUXES; IMPACT
WOS研究方向	Soil Science
WOS记录号	WOS:000950073200001
来源期刊	SOIL USE AND MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283506
作者单位	Northwest Normal University - China; Northwest Normal University - China; Northwest Normal University - China
推荐引用方式 GB/T 7714	Zhang, Zhiwei,Zhao, Cheng-Zhang,Bai, Xuqian,et al. Examining soil organic carbon in the mountainous peat swamps of the Zoige Plateau in China's Qinghai-Tibet Plateau[J],2023,39(2).
APA	Zhang, Zhiwei,Zhao, Cheng-Zhang,Bai, Xuqian,Li, Qun,&Ma, Min.(2023).Examining soil organic carbon in the mountainous peat swamps of the Zoige Plateau in China's Qinghai-Tibet Plateau.SOIL USE AND MANAGEMENT,39(2).
MLA	Zhang, Zhiwei,et al."Examining soil organic carbon in the mountainous peat swamps of the Zoige Plateau in China's Qinghai-Tibet Plateau".SOIL USE AND MANAGEMENT 39.2(2023).