Within-twig biomass allocation in subtropical evergreen broad-leaved species along an altitudinal gradient: allometric scaling analysis

	Within-twig biomass allocation in subtropical evergreen broad-leaved species along an altitudinal gradient: allometric scaling analysis
	Xiang, SA ; Wu, N ; Sun, SC
刊名	TREES-STRUCTURE AND FUNCTION
	2009
卷号	23 期号:3 页码:637_647
关键词	Allometry Biomass allocation Leaf size Petiole Twig Subtropical evergreen broad-leaved forest
ISSN号	0931-1890
通讯作者	Sun, SC, Nanjing Univ, Dept Biol, 22 Hankou Rd, Nanjing 210093, Peoples R China.
中文摘要	We studied the effects of twig size and altitude on biomass allocation within plant twigs (terminal branches of current-year shoots), to determine whether species with large twigs/leaves or living at low altitude allocate a higher proportion of biomass to laminas than their counterparts with small twigs/leaves or living at high altitude. Stem mass, lamina mass and area, and petiole mass were measured for terminal branches of current-year shoots in 80 subtropical evergreen broad-leaved species belonging to 38 genera from 24 families along an altitudinal gradient of Mt. Emei, Southwest China. The scaling relationships between the biomass allocations of within-twig components were determined using model type II regression method. Isometric relationships were found between leaf mass and twig mass and between lamina mass and twig mass, suggesting that the biomass allocation to either leaves or laminas was independent of twig mass. Petiole mass disproportionally increased with both lamina mass and twig mass, indicating the importance of leaf petioles to the within-twig biomass allocation. These cross-species correlations were consistent with those among evolutionary divergences. In addition, species at low altitude tended to have a greater leaf and lamina mass but a smaller stem mass at a given twig mass than at middle and high altitudes. This is possibly due to the high requirement in physical support and the low efficiency of eco-physiological transport for the species living at high altitude. In general, within-twig biomass allocation pattern was not significantly affected by twig size but was greatly modulated by altitude.
学科主题	Forestry
收录类别	SCI
资助信息	Chinese Academy of Sciences [KZCX2-XB2-02]; National Science Foundation of China [30670333]; NCET
语种	英语
公开日期	2011-07-08
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/22378]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Xiang, SA,Wu, N,Sun, SC. Within-twig biomass allocation in subtropical evergreen broad-leaved species along an altitudinal gradient: allometric scaling analysis[J]. TREES-STRUCTURE AND FUNCTION,2009,23(3):637_647.
APA	Xiang, SA,Wu, N,&Sun, SC.(2009).Within-twig biomass allocation in subtropical evergreen broad-leaved species along an altitudinal gradient: allometric scaling analysis.TREES-STRUCTURE AND FUNCTION,23(3),637_647.
MLA	Xiang, SA,et al."Within-twig biomass allocation in subtropical evergreen broad-leaved species along an altitudinal gradient: allometric scaling analysis".TREES-STRUCTURE AND FUNCTION 23.3(2009):637_647.