Predicting parameters of degradation succession processes of Tibetan Kobresia grasslands

doi:10.5194/se-6-1237-2015

NWIPB OpenIR

	Predicting parameters of degradation succession processes of Tibetan Kobresia grasslands
	Lin, L.1; Li, Y. K.1; Xu, X. L.2; Zhang, F. W.1; Du, Y. G.1; Liu, S. L.1; Guo, X. W.1; Cao, G. M.1
	2015
发表期刊	SOLID EARTH
卷号	6 期号:4 页码:1237-1246
文章类型	Article
摘要	In the past two decades, increasing human activity (i.e., overgrazing) in the Tibetan Plateau has strongly influenced plant succession processes, resulting in the degradation of alpine grasslands. Therefore, it is necessary to diagnose the degree of degradation to enable implementation of appropriate management for sustainable exploitation and protection of alpine grasslands. Here, we investigated environmental factors and plant functional group (PFG) quantity factors during the alpine grassland succession processes. Principal component analysis (PCA) was used to identify the parameters indicative of degradation. We divided the entire degradation process into six stages. PFG types shifted from rhizome bunchgrasses to rhizome plexus and denseplexus grasses during the degradation process. Leguminosae and Gramineae plants were replaced by sedges during the advanced stages of degradation. The PFGs were classified into two reaction groups: the grazing-sensitive group, containing Kobresia humilis Mey, and Gramineae and Leguminosae plants, and the grazing-insensitive group, containing Kobresia pygmaea Clarke. The first group was correlated with live root biomass in the surface soil (0-10 cm), whereas the second group was strongly correlated with mattic epipedon thickness and K. pygmaea characteristics. The degree of degradation of alpine meadows may be delineated by development of mattic epipedon and PFG composition. Thus, meadows could be easily graded and their use adjusted based on our scaling system, which would help prevent irreversible degradation of important grasslands. Because relatively few environmental factors are investigated, this approach can save time and labor to formulate a conservation management plan for degraded alpine meadows.
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.5194/se-6-1237-2015
关键词[WOS]	3-RIVER HEADWATERS REGION ; QINGHAI PROVINCE ; ALPINE MEADOW ; RANGELAND DEGRADATION ; SOIL-EROSION ; PLATEAU ; CHINA ; MODEL ; PRODUCTIVITY ; ENVIRONMENT
收录类别	SCI
语种	英语
项目资助者	Strategic Priority Research Program Climate Change(XDA05050404) ; National Natural Science Foundation of China(41030105 ; Science and Technology Department of Qinghai Province(2013-N-540) ; 31270576 ; 31500368)
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000374540800010
引用统计	被引频次：59[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/5750
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810001, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Lin, L.,Li, Y. K.,Xu, X. L.,et al. Predicting parameters of degradation succession processes of Tibetan Kobresia grasslands[J]. SOLID EARTH,2015,6(4):1237-1246.
APA	Lin, L..,Li, Y. K..,Xu, X. L..,Zhang, F. W..,Du, Y. G..,...&Cao, G. M..(2015).Predicting parameters of degradation succession processes of Tibetan Kobresia grasslands.SOLID EARTH,6(4),1237-1246.
MLA	Lin, L.,et al."Predicting parameters of degradation succession processes of Tibetan Kobresia grasslands".SOLID EARTH 6.4(2015):1237-1246.

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