A test of the generality of leaf trait relationships on the Tibetan Plateau
A test of the generality of leaf trait relationships on the Tibetan Plateau
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DOI：
10.1111/j.1469-8137.2006.01704.x
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发表时间：
2006-01-01
期刊：
影响因子：
9.4
通讯作者：
Fang, JY
中科院分区：
文献类型：
--
作者：
He, JS;Wang, ZH;Fang, JY
圈每面积叶质量（LMA）、氮浓度（分别基于质量和面积，N质量和N面积）、光合能力（A（质量）和A（面积））和光合氮利用效率（PNUE）是关键的叶片性状，但很少有来自寒冷、高海拔的数据environments.circle。我们系统地测量了青藏高原49个研究点的74个物种的这些叶片性状，以研究这些性状（在植物耐受性的极端附近测量）如何与全球相比patterns.circle。与全球数据集相比，西藏物种具有较高的叶片氮浓度和光合能力，但在给定的N质量下，它们的A（质量）略低。这些叶片性状关系与全球数据集报道的一致，标准化主轴A（质量）-LMA，N-mass-LMA和A（质量）-N-mass的斜率与全球数据集的一致。traits.circle我们的数据表明，叶性状的协变集在不同环境和地理区域是一致的。我们的研究结果表明，在极端环境下叶性状关系的功能收敛。
circle Leaf mass per area (LMA), nitrogen concentration (on mass and area bases, N-mass and N-area, respectively), photosynthetic capacity (A(mass) and A(area)) and photosynthetic nitrogen use efficiency (PNUE) are key foliar traits, but few data are available from cold, high-altitude environments.circle Here, we systematically measured these leaf traits in 74 species at 49 research sites on the Tibetan Plateau to examine how these traits, measured near the extremes of plant tolerance, compare with global patterns.circle Overall, Tibetan species had higher leaf nitrogen concentrations and photosynthetic capacities compared with a global dataset, but they had a slightly lower A(mass) at a given N-mass. These leaf trait relationships were consistent with those reported from the global dataset, with slopes of the standardized major axes A(mass)-LMA, N-mass-LMA and A(mass)-N-mass identical to those from the global dataset. Climate only weakly modulated leaf traits.circle Our data indicate that covarying sets of leaf traits are consistent across environments and biogeographic regions. Our results demonstrate functional convergence of leaf trait relationships in an extreme environment.