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changesinindividualplanttraitsandbiomassallocationinalpinemeadowwithelevationvariationontheqinghaitibetanplateau
Ma Weiling1; Shi Peili2; Li Wenhua2; He Yongtao2; Zhang Xianzhou2; Shen Zhenxi2; Chai Siyue1
2010
Source Publicationsciencechinalifesciences
ISSN1674-7305
Volume53Issue:9Pages:1142
AbstractPlant traits and individual plant biomass allocation of 57 perennial herbaceous species, belonging to three common functional groups(forbs, grasses and sedges)at subalpine(3700 m ASL), alpine(4300 m ASL)and subnival(≥5000 m ASL)sites were examined to test the hypothesis that at high altitudes, plants reduce the proportion of aboveground parts and allocate more biomass to belowground parts, especially storage organs,as altitude increases,so as to geminate and resist environmental stress. However, results indicate that some divergence in biomass allocation exists among organs. With increasing altitude, the mean fractions of total biomass allocated to aboveground parts decreased. The mean fractions of total biomass allocation to storage organs at the subalpine site(7%±2%S.E.)were distinct from those at the alpine(23%±6%)and subnival(21%±6%) sites, while the proportions of green leaves at all altitudes remained almost constant. At 4300 m and 5000 m, the mean fractions of flower stems decreased by 45%and 41%, respectively, while fine roots increased by 86%and 102%, respectively. Specific leaf areas and leaf areas of forbs and grasses deceased with rising elevation, while sedges showed opposite trends. For all three functional groups, leaf area ratio and leaf area root mass ratio decreased, while fine root biomass increased at higher altitudes. Biomass allocation patterns of alpine plants were characterized by a reduction in aboveground reproductive organs and enlargement of fine roots, while the proportion of leaves remained stable. It was beneficial for high altitude plants to compensate carbon gain and nutrient uptake under low temperature and limited nutrients by stabilizing biomass investment to photosynthetic structures and increasing the absorption surface area of fine roots. In contrast to forbs and grasses that had high mycorrhizal infection, sedges had higher single leaf area and more root fraction, especially fine roots
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/93894
Collection中国科学院地理科学与资源研究所
Affiliation1.中国科学院大学
2.中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Ma Weiling,Shi Peili,Li Wenhua,et al. changesinindividualplanttraitsandbiomassallocationinalpinemeadowwithelevationvariationontheqinghaitibetanplateau[J]. sciencechinalifesciences,2010,53(9):1142.
APA Ma Weiling.,Shi Peili.,Li Wenhua.,He Yongtao.,Zhang Xianzhou.,...&Chai Siyue.(2010).changesinindividualplanttraitsandbiomassallocationinalpinemeadowwithelevationvariationontheqinghaitibetanplateau.sciencechinalifesciences,53(9),1142.
MLA Ma Weiling,et al."changesinindividualplanttraitsandbiomassallocationinalpinemeadowwithelevationvariationontheqinghaitibetanplateau".sciencechinalifesciences 53.9(2010):1142.
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