Simulating warmer and drier climate increases root production but decreases root decomposition in an alpine grassland on the Tibetan plateau

NWIPB OpenIR

	Simulating warmer and drier climate increases root production but decreases root decomposition in an alpine grassland on the Tibetan plateau
	Liu, Huiying; Lin, Li; Wang, Hao; Zhang, Zhenhua; Shangguan, Zijian; Feng, Xiaojuan; He, Jin-Sheng
	2020
发表期刊	PLANT AND SOIL
摘要	Background Future ecosystem structure and function will largely depend on root responses to climate change. However, few studies have explored the responses of root production and decomposition to simultaneous warming and altered precipitation in high-latitude and high-altitude ecosystems. Methods Using ingrowth core and root bag methods, we investigated root production and decomposition dynamics from 2013 to 2015 in a full-factorial warming (control, 1.5 similar to 1.8 degrees C warming) and precipitation (dry (-50% precipitation), ambient, and wet (+50% precipitation)) experiment established in 2011 in a Tibetan alpine grassland. Results Warming and precipitation effects on root production were independent. Dry plus warming treatments increased root production, while wet treatments did not significantly affect root production. In contrast, root decomposition accelerated along the increasing precipitation gradient. Warming tended to decrease root decomposition under dry treatments but did not affect root decomposition under wet treatments. The different responses of root production among the treatments were mainly driven by changes in soil moisture, whereas those of root decomposition were mainly due to the changes in the root carbon nitrogen ratio, soil microbial biomass and soil moisture. Conclusions Given that altered precipitation had contrasting effects on root production and decomposition, our findings indicate that root-derived carbon may accumulate in soils on the Tibetan Plateau where precipitation decreases but not in the areas with projected increasing precipitation under future warming.
关键词	Global warming Precipitation Root dynamics Alpine ecosystems The Tibetan plateau
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60331
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Liu, Huiying,Lin, Li,Wang, Hao,et al. Simulating warmer and drier climate increases root production but decreases root decomposition in an alpine grassland on the Tibetan plateau[J]. PLANT AND SOIL,2020.
APA	Liu, Huiying.,Lin, Li.,Wang, Hao.,Zhang, Zhenhua.,Shangguan, Zijian.,...&He, Jin-Sheng.(2020).Simulating warmer and drier climate increases root production but decreases root decomposition in an alpine grassland on the Tibetan plateau.PLANT AND SOIL.
MLA	Liu, Huiying,et al."Simulating warmer and drier climate increases root production but decreases root decomposition in an alpine grassland on the Tibetan plateau".PLANT AND SOIL (2020).