Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands
	Hong, Jiangtao1,2 ; Ma, Xingxing1,2 ; Wang, Xiaodan1
刊名	ECOLOGY AND EVOLUTION
	2016-04-01
卷号	6 期号:8 页码:2325-2332
关键词	Alpine plant biomass allocation fencing grazing leaf meristems Tibetan Plateau
ISSN号	2045-7758
通讯作者	Wang, Xiaodan
英文摘要	Grazing and fencing are two important factors that influence productivity and biomass allocation in alpine grasslands. The relationship between root (R) and shoot (S) biomass and the root: shoot ratio (R/S) are critical parameters for estimating the terrestrial carbon stocks and biomass allocation mechanism responses to human activities. Previous studies have often used the belowground: aboveground biomass ratio (M-b/M-a) to replace the R/S in alpine ecosystems. However, these studies may have neglected the leaf meristem biomass, which belongs to the shoot but occurs below the soil surface, leading to a significant overestimation of the R/S ratio. We conducted a comparative study to explore the differences between the R/S and M-b/M-a at both the species (Stipa purpurea, Carex moorcroftii, and Artemisia nanschanica) and community levels on a Tibetan alpine grassland with grazing and fencing management blocks. The results revealed that the use of the M-b/M-a to express the R/S appeared to overestimate the actual value of the R/S, both at species and community levels. For S. purpurea, the M-b/M-a was three times higher than the R/S. The M-b/M-a was approximately two times higher than the R/S for the species of C. moorcroftii and A. nanschanica and at the community level. The relationships between the R-S and M-b-M-a exhibited different slopes for the alpine plants across all the management practices. Compared to the fenced grasslands, the plants in the grazing blocks not only allocated more biomass to the roots but also to the leaf meristems. The present study highlights the contribution of leaf meristems to the accurate assessment of shoot and belowground biomasses. The R/S and M-b/M-a should be cautiously used in combination in the future research. The understanding of the distinction between the R-S and M-b-M-a may help to improve the biomass allocation mechanism response to human disturbances in an alpine area.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Ecology
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	TIBETAN PLATEAU ; NORTHERN TIBET ; ROOT ; ECOSYSTEMS ; PATTERN ; CHINA
收录类别	SCI
语种	英语
WOS记录号	WOS:000374568300007
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17388]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hong, Jiangtao,Ma, Xingxing,Wang, Xiaodan. Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands[J]. ECOLOGY AND EVOLUTION,2016,6(8):2325-2332.
APA	Hong, Jiangtao,Ma, Xingxing,&Wang, Xiaodan.(2016).Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands.ECOLOGY AND EVOLUTION,6(8),2325-2332.
MLA	Hong, Jiangtao,et al."Leaf meristems: an easily ignored component of the response to human disturbance in alpine grasslands".ECOLOGY AND EVOLUTION 6.8(2016):2325-2332.