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Contrasting changes in above- and below-ground biomass allocation across treeline ecotones in southeast Tibet
Liu, XS (Liu Xin-sheng)1,2; Nie, YQ (Nie Yu-qin)3; Kong, GQ (Kong Gao-qiang)2; Luo, TX (Luo Tian-xiang)2; Liu, XS
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
2016
Volume13Issue:11Pages:2036-2045
DOI10.1007/s11629-016-4003-6
AbstractUnder conditions of a warmer climate, the advance of the alpine treeline into alpine tundra has implications for carbon dynamics in mountain ecosystems. However, the above- and below-ground live biomass allocations among different vegetation types within the treeline ecotones are not well investigated. To determine the altitudinal patterns of above-/below-ground carbon allocation, we measured the root biomass and estimated the above-ground biomass (AGB) in a subalpine forest, treeline forest, alpine shrub, and alpine grassland along two elevational transects towards the alpine tundra in southeast Tibet. The AGB strongly declined with increasing elevation, which was associated with a decrease in the leaf area index and a consequent reduction in carbon gain. The fine root biomass (FRB) increased significantly more in the alpine shrub and grassland than in the treeline forest, whereas the coarse root biomass changed little with increasing altitudes, which led to a stable below-ground biomass (BGB) value across altitudes. Warm and infertile soil conditions might explain the large amount of FRB in alpine shrub and grassland. Consequently, the root to shoot biomass ratio increased sharply with altitude, which suggested a remarkable shift of biomass allocation to root systems near the alpine tundra. Our findings demonstrate contrasting changes in AGB and BGB allocations across treeline ecotones, which should be considered when estimating carbon dynamics with shifting treelines.
Subject Area自然地理学
WOS IDWOS:000387032600012
Language英语
Indexed BySCI
KeywordNet Primary Productivity Fine-root Biomass Soil-temperature Alpine Treeline Sergyemla Mountains British-columbia Vegetation Types Climate-change Plateau Elevation
Cooperation Status国内
Department环境
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7510
Collection图书馆
Corresponding AuthorLiu, XS
Affiliation1.Jiujiang Univ, Coll Tourism & Terr Resources, Jiujiang 332005, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China
3.Jiujiang Univ, Sch Accountancy, Jiujiang 332005, Peoples R China
Recommended Citation
GB/T 7714
Liu, XS ,Nie, YQ ,Kong, GQ ,et al. Contrasting changes in above- and below-ground biomass allocation across treeline ecotones in southeast Tibet[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(11):2036-2045.
APA Liu, XS ,Nie, YQ ,Kong, GQ ,Luo, TX ,&Liu, XS.(2016).Contrasting changes in above- and below-ground biomass allocation across treeline ecotones in southeast Tibet.JOURNAL OF MOUNTAIN SCIENCE,13(11),2036-2045.
MLA Liu, XS ,et al."Contrasting changes in above- and below-ground biomass allocation across treeline ecotones in southeast Tibet".JOURNAL OF MOUNTAIN SCIENCE 13.11(2016):2036-2045.
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