Early season precipitation accounts for the variability of fine-root traits in a Tibetan alpine grassland

doi:10.1016/j.envexpbot.2020.103991

	Early season precipitation accounts for the variability of fine-root traits in a Tibetan alpine grassland
	Cao, Jirong ; Lin, Li ; Pang, Shuang ; Guo, Xiaowei 3; Cao, Guangmin 3; He, Jin-Sheng ; Wang, Qibing
	2020
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	172
摘要	Root trait dynamics can reflect the adjustment in the strategy of plant roots in resource acquisition and energy storage when responding to climatic fluctuations. Under global change, the responses of root traits in climate sensitive ecosystems, e.g. high-elevation and cold Alpine ecosystems, remain unclear. To identify how climatic fluctuations drive the variations in the root traits in a Tibetan alpine grassland, we intensively investigated the temporal dynamic of root traits by biweekly measuring root length, root biomass and specific root length for three continuous years. The SRL showed strong seasonal patterns across three years, which did not support SRL considered as a constant in previous root system modeling, while as hypothesized, mean SRL in non-growing seasons was significantly higher than that in growing seasons by 17 %. The accumulative air temperature of growing or non-growing season exerted synchronic effects on the changes in root traits. Nevertheless, precipitation was observed to have the lag effects on root traits, showing that January-April accumulative precipitation was a major driver for the variations in the root length and root biomass respectively peaking in July and June each year. Distinguishingly, root length relied on the lag effect of precipitation; however, for root biomass, the continuous accumulative precipitation together with peak month, i.e. the January-June accumulative precipitation, was also significantly vital. Our results would have an important implication for predicting responses of belowground carbon cycling to global climate change.
关键词	Alpine ecosystems Fine roots Non-growing season Precipitation Root traits Root biomass Specific root length
学科领域	Plant Sciences ; Environmental Sciences
DOI	10.1016/j.envexpbot.2020.103991
收录类别	SCI
语种	英语
WOS关键词	NORWAY SPRUCE ; PLANT ; FOREST ; LENGTH ; PLASTICITY ; TURNOVER ; DYNAMICS ; IMPACTS ; WATER ; LEAF
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
WOS记录号	WOS:000518704100004
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-7307
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41271316, 30670348] ; National Basic Research Program of China (973 Program)National Basic Research Program of China [2014CB954003, 2014CB954004]
作者邮箱	qwang@ibcas.ac.cn
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21874
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Minist Educ, Beijing 100871, Peoples R China 3.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 5.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China 6.Lanzhou Univ, Inst Innovat Ecol, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Cao, Jirong,Lin, Li,Pang, Shuang,et al. Early season precipitation accounts for the variability of fine-root traits in a Tibetan alpine grassland[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2020,172.
APA	Cao, Jirong.,Lin, Li.,Pang, Shuang.,Guo, Xiaowei.,Cao, Guangmin.,...&Wang, Qibing.(2020).Early season precipitation accounts for the variability of fine-root traits in a Tibetan alpine grassland.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,172.
MLA	Cao, Jirong,et al."Early season precipitation accounts for the variability of fine-root traits in a Tibetan alpine grassland".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 172(2020).

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