气候变化领域集成服务门户(CCPortal): Precipitation- rather than temperature-driven pattern in belowground biomass and root:shoot ratio across the Qinghai-Tibet Plateau

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DOI	10.1016/j.scitotenv.2024.170158
	Precipitation- rather than temperature-driven pattern in belowground biomass and root:shoot ratio across the Qinghai-Tibet Plateau
	Chen, Sihan; Huang, Kailing; Hu, Lingyan; Wang, Peng; Hu, Shuijin
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
卷号	915
英文摘要	The Qinghai -Tibet Plateau faces dramatic global change, which can greatly affect its plant growth, biomass accumulation, and carbon cycling. However, it is still unclear how belowground plant biomass, which is the major part of vegetation biomass on the plateau, changes with different environmental factors, impeding accurate prediction of ecosystem carbon cycling under future global change scenarios. To reveal the patterns of belowground biomass and root:shoot ratio with environmental factors in different vegetation types on the Qinghai -Tibet Plateau, we synthesized data for 158 sites from 167 publications, including 585 and 379 observations for above- and below -ground biomass, respectively. Data on temperature, precipitation, soil nitrogen content, evapotranspiration and solar radiation were collected from open databases. The results showed that precipitation, rather than temperature, was closely associated with other environmental factors including soil N and solar radiation. Also, both above- and below -ground biomass significantly increased with annual precipitation and its related environmental factors, while elevation -related coldness only slightly decreased aboveground biomass. In addition, the positive effect of precipitation on belowground biomass is more obvious in higher elevations (colder areas). As a result, root:shoot ratio significantly increased with precipitation in colder areas but not in warmer areas. Finally, the positive relationship between biomass and precipitation was stronger for dryer steppes than for wetter meadows and shrublands. Our findings indicate that precipitation, as well as the associated nitrogen availability and solar radiation, together are more important drivers than temperature for ecosystem productivity and biomass allocation on the Qinghai -Tibet Plateau. Given the heterogeneous trend of precipitation change on the plateau, productivity response to global change can be highly variable across different regions and vegetation types, which can consequently impact soil carbon dynamics and regional carbon cycling.
关键词	Alpine Biomass Climate change Grassland Productivity Root
英文关键词	LITTER DECOMPOSITION; ALPINE MEADOWS; CLIMATE; FOREST; PLANTS; ROOT; ECOSYSTEMS; ALLOCATION; RESPONSES; DYNAMICS
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001162447600001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283046
作者单位	Nanjing Agricultural University; University of Konstanz; North Carolina State University
推荐引用方式 GB/T 7714	Chen, Sihan,Huang, Kailing,Hu, Lingyan,et al. Precipitation- rather than temperature-driven pattern in belowground biomass and root:shoot ratio across the Qinghai-Tibet Plateau[J],2024,915.
APA	Chen, Sihan,Huang, Kailing,Hu, Lingyan,Wang, Peng,&Hu, Shuijin.(2024).Precipitation- rather than temperature-driven pattern in belowground biomass and root:shoot ratio across the Qinghai-Tibet Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,915.
MLA	Chen, Sihan,et al."Precipitation- rather than temperature-driven pattern in belowground biomass and root:shoot ratio across the Qinghai-Tibet Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 915(2024).