气候变化领域集成服务门户(CCPortal): Plant biomass of grasses in actively restored grasslands shows stronger association with eco-physiological properties than in degraded native grasslands

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DOI	10.1002/ldr.5124
	Plant biomass of grasses in actively restored grasslands shows stronger association with eco-physiological properties than in degraded native grasslands
	Xu, Danghui; Wang, Xiejun; Tang, Yuxin; Mou, Wenbo; Yao, Guangqian; Yuan, Jianli; Fang, Xiangwen
发表日期	2024
ISSN	1085-3278
EISSN	1099-145X
起始页码	35
结束页码	9
卷号	35 期号:9
英文摘要	Grassland degradation levels determine plant eco-physiological properties, and thus influences ecosystem function. However, how land degradation affects the relationship between plant biomass and eco-physiological properties of native and artificially restored grasslands is insufficiently understood. Here, we evaluated aboveground biomass (AGB), plant photosynthetic capacity, as well as soil texture, in a series of native grasslands (non-degraded, slightly degraded, moderately degraded, heavily degraded, and extremely degraded) and artificially restored grasslands with different growth times (5, 9, 11, 14 and 17 years) within the alpine grassland ecosystem of the Qinghai-Tibet Plateau during the plant growing season. Results showed that, in native grasslands, land degradation significantly decreased the nitrogen (N) concentration and AGB of grasses but did not impact the phosphorus (P) concentration. In actively restored grasslands, the AGB, photosynthetic rate (Pn), N and P of grasses decreased significantly after 9 years or longer of replanting time. Furthermore, the AGB of grasses in actively restored grasslands showed stronger association with eco-physiological properties than in native grasslands. In native grasslands, degradation affected AGB directly, but also indirectly through Pn. In actively restored grasslands, degradation affected AGB directly, but also indirectly through Pn, N and P. Our findings suggest that the mechanisms by which grass species respond to degradation differ between native and actively restored grasslands. Also, compared to native grasslands, the eco-physiological properties of grasses are more sensitive to changing environmental conditions in actively restored grasslands. More importantly, the differing response mechanisms are likely to alter the plant community dynamics and future ecosystem stability.
英文关键词	active restoration; grassland degradation; photosynthesis; plant nitrogen concentration; structural equation model
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
WOS记录号	WOS:001204079100001
来源期刊	LAND DEGRADATION & DEVELOPMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301058
作者单位	Lanzhou University
推荐引用方式 GB/T 7714	Xu, Danghui,Wang, Xiejun,Tang, Yuxin,et al. Plant biomass of grasses in actively restored grasslands shows stronger association with eco-physiological properties than in degraded native grasslands[J],2024,35(9).
APA	Xu, Danghui.,Wang, Xiejun.,Tang, Yuxin.,Mou, Wenbo.,Yao, Guangqian.,...&Fang, Xiangwen.(2024).Plant biomass of grasses in actively restored grasslands shows stronger association with eco-physiological properties than in degraded native grasslands.LAND DEGRADATION & DEVELOPMENT,35(9).
MLA	Xu, Danghui,et al."Plant biomass of grasses in actively restored grasslands shows stronger association with eco-physiological properties than in degraded native grasslands".LAND DEGRADATION & DEVELOPMENT 35.9(2024).