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	Responses of above- and below-ground carbon stocks to environmental drivers in Tibetan Alpine grasslands
	Liu H. S.; Miao, Z. W.
	2016
关键词	annual precipitation soil moisture biomass annual mean temperature variation partition spatial scales soil organic-carbon aboveground biomass grazing intensity climate-change arctic tundra ecosystem storage nitrogen plant plateau
英文摘要	Paucity in the knowledge of responses of grassland carbon dynamics to environmental variables constrains our ability to predict future ecosystem productivity. The aim of this study was to investigate differential responses of above- and below-ground carbon stocks to environmental drivers in Tibetan alpine Plateau at both regional and local scales. Variance partitioning and non-linear regression between carbon stocks and environmental driving variables suggested that both above- and below-ground carbon stocks showed a significant negative relationship with temperature and a positive relationship with soil moisture. Annual accumulated temperature constrained above-ground carbon at regional scale (r(2)=0.50, P<0.0001), while soil moisture controlled below-ground carbon at local scale (r(2)=0.48, P<0.0001). Scale-specific responses of above- and belowground carbon storage to temperature and soil moisture complicated the influences of abiotic environmental variables on ecosystem productivity. Soil carbon had significant unimodal (r(2)=0.11, P=0.0073) and linear (r(2)=0.37, P<0.0001) relationships with mean annual temperature and soil moisture, respectively. Since the driving factors of aboveground and soil carbon content are specific to spatial scales, the relationships of grassland carbon storage and environmental factors at small scales are not applicable to a large spatial scale.
出处	Journal of Environmental Engineering and Landscape Management
卷	24
期	1
页	1-9
语种	英语
ISSN号	1648-6897
DOI标识	10.3846/16486897.2015.1071709
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42743]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Liu H. S.,Miao, Z. W.. Responses of above- and below-ground carbon stocks to environmental drivers in Tibetan Alpine grasslands. 2016.

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