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学科主题: 地理学::自然地理学
题名: Contrasting changes in above- and below-ground biomass allocation across treeline ecotones in southeast Tibet
作者: 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
通讯作者: Liu, XS
关键词: NET PRIMARY PRODUCTIVITY ; FINE-ROOT BIOMASS ; SOIL-TEMPERATURE ; ALPINE TREELINE ; SERGYEMLA MOUNTAINS ; BRITISH-COLUMBIA ; VEGETATION TYPES ; CLIMATE-CHANGE ; PLATEAU ; ELEVATION
刊名: JOURNAL OF MOUNTAIN SCIENCE
发表日期: 2016
DOI: 10.1007/s11629-016-4003-6
卷: 13, 期:11, 页:2036-2045
收录类别: SCI
合作性质: 国内
文章类型: Article
部门归属: 环境
英文摘要: Under 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.
语种: 英语
WOS记录号: WOS:000387032600012
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7510
Appears in Collections:图书馆_期刊论文

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作者单位: 1.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:
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.
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文件名: V.13(11) 2036-2045 2016.pdf
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