干旱区生态环境知识资源中心(Arid): Seabuckthorn (Hippophae rhamnoides L.) plantation degradation aggravates microbial metabolic C and P limitations on the Northern Loess Plateau in China

Arid

DOI	10.1016/j.scitotenv.2024.174088
	Seabuckthorn (Hippophae rhamnoides L.) plantation degradation aggravates microbial metabolic C and P limitations on the Northern Loess Plateau in China
	Yang, Kaiqi; Zhang, Zhiao; Tang, Mei; Ren, Yunzhuo; Hu, Jian; Zhen, Qing; Zheng, Jiyong
通讯作者	Zhen, Q
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	945
英文摘要	Vegetation degradation in arid and semi -arid regions reduces plant C inputs to the soil, which can impede soil nutrient cycling because of the limited C source for microbial metabolism. However, whether vegetation degradation aggravates microbial nutrient limitation in degraded ecosystems in arid and semi -arid regions is not fully understood. Here, we investigated changes in soil enzyme activity and microbial nutrient limitation along a well-documented gradient of degraded seabuckthorn ( Hippophae rhamnoides L.) (slightly degraded, canopy dieback <25 %, moderately degraded, canopy dieback 25 % -75 %, and severely degraded, canopy dieback >75 %) in Liang (long ridge) and gully channel locations in the Pisha Sandstone region of the Loess Plateau, China. We found that as the magnitude of seabuckthorn degradation increased, activities of C-acquiring enzymes and ratios of C:N and C:P enzymes (0.54 -0.80 and 0.52 -0.77, respectively) increased whereas the N:P enzyme ratio (0.93 -0.99) decreased. Stoichiometric modelling further indicated that microorganisms were limited by soil C and P (vector angle >45 degrees ) in the seabuckthorn plantation region, and the degradation of seabuckthorn plantation aggravated microbial C and P limitations. Partial least squares path modelling revealed that seabuckthorn degradation (canopy dieback) was the main factor explaining microbial C limitation variations, while soil physicochemical properties (pH and soil moisture content) and understory plant parameters (litter biomass) were the major factors underlying microbial P limitation of long ridge and gully channel formations, respectively. Our findings highlight synergistic changes between aboveground and belowground processes, suggesting an unexpected negative effect of vegetation degradation on soil microbial community and nutrient cycling. These insights offer a direction for the development of plantation nutrients management strategies in semi -arid and arid areas.
英文关键词	Enzymatic activity and stoichiometry Vector analysis Pisha Sandstone region Soil microbial metabolic limitation Partial least squares path modelling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001276387200001
WOS关键词	ENZYME-ACTIVITY ; NUTRIENT LIMITATION ; ORGANIC-CARBON ; USE EFFICIENCY ; SOIL ; STOICHIOMETRY ; DYNAMICS ; DROUGHT ; RESTORATION ; DEPOSITION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405510
推荐引用方式 GB/T 7714	Yang, Kaiqi,Zhang, Zhiao,Tang, Mei,et al. Seabuckthorn (Hippophae rhamnoides L.) plantation degradation aggravates microbial metabolic C and P limitations on the Northern Loess Plateau in China[J],2024,945.
APA	Yang, Kaiqi.,Zhang, Zhiao.,Tang, Mei.,Ren, Yunzhuo.,Hu, Jian.,...&Zheng, Jiyong.(2024).Seabuckthorn (Hippophae rhamnoides L.) plantation degradation aggravates microbial metabolic C and P limitations on the Northern Loess Plateau in China.SCIENCE OF THE TOTAL ENVIRONMENT,945.
MLA	Yang, Kaiqi,et al."Seabuckthorn (Hippophae rhamnoides L.) plantation degradation aggravates microbial metabolic C and P limitations on the Northern Loess Plateau in China".SCIENCE OF THE TOTAL ENVIRONMENT 945(2024).