气候变化领域集成服务门户(CCPortal): Patchiness-driven loss of soil organic carbon and total nitrogen could be offset by vegetation recovery

CCPortal

DOI	10.1016/j.catena.2024.107940
	Patchiness-driven loss of soil organic carbon and total nitrogen could be offset by vegetation recovery
	Qin, Yu; Liu, Xinyu; Meng, Baoping; Zhang, Huifang; Lv, Yanyan; Ruan, Xirui; Yi, Shuhua; Sun, Yi
发表日期	2024
ISSN	0341-8162
EISSN	1872-6887
起始页码	239
卷号	239
英文摘要	Patchiness acts as an indicator of terrestrial ecosystem degradation and can lead to considerable loss of soil organic carbon and total nitrogen. However, quantitative assessments of the effects of patchiness on soil organic carbon and total nitrogen stocks and their associated mechanisms remain limited. This study aimed to explore the influence mechanisms of patchiness on soil organic carbon and total nitrogen stocks and to project the quantitative contribution of the further expansion of patchiness and vegetation recovery. Soil properties, soil organic carbon and total nitrogen stocks were investigated using a combination of field sampling and aerial photography in four grassland types, alpine meadow, alpine steppe, temperate grassland, and desert grassland, at 47 sites in northwestern China. Soil organic carbon and total nitrogen densities in the bare patches were 34 - 54 % and 23 - 41 % lower, respectively, compared to the original vegetation. At the plot-scale, current soil organic carbon and total nitrogen stocks ranged from 30.85 to 77.80 T/ha and 3.26 to 10.19 T/ha, respectively, across grassland types; with a 10 - 27 % and 7 - 24 % potential loss of soil organic carbon and total nitrogen stocks, respectively, from the further expansion of patchiness but a 10 - 50 % and 9 - 37 % potential increase in soil organic carbon and total nitrogen stocks, respectively, from vegetation recovery. Soil organic carbon and total nitrogen stocks were positively correlated with vegetation biomass, soil clay content, and precipitation (p < 0.001), whereas they were negatively correlated with patchiness (p < 0.001). In summary, patchiness reduced soil organic carbon and total nitrogen stocks by decreasing vegetation inputs and increasing erosion outputs, while vegetation recovery showed potential for increasing carbon and nitrogen stocks. Our results highlight that maintaining intact vegetation cover is critical for preserving terrestrial ecosystem carbon and nitrogen storage.
英文关键词	Bare patch; Original vegetation; Fragile ecosystem; Soil organic carbon stock; Total nitrogen stock
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:001218634500001
来源期刊	CATENA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304471
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Nantong University; Guizhou Academy of Agricultural Sciences
推荐引用方式 GB/T 7714	Qin, Yu,Liu, Xinyu,Meng, Baoping,et al. Patchiness-driven loss of soil organic carbon and total nitrogen could be offset by vegetation recovery[J],2024,239.
APA	Qin, Yu.,Liu, Xinyu.,Meng, Baoping.,Zhang, Huifang.,Lv, Yanyan.,...&Sun, Yi.(2024).Patchiness-driven loss of soil organic carbon and total nitrogen could be offset by vegetation recovery.CATENA,239.
MLA	Qin, Yu,et al."Patchiness-driven loss of soil organic carbon and total nitrogen could be offset by vegetation recovery".CATENA 239(2024).