中文摘要：

在分配到功能的部件的生物资源的部分的变化广泛地为草地植物被看作对资源可获得性的植物回答。观察等大地显示了射击在西藏的高山的草地在种类水平在社区水平，但是 allometrically 联系到根。这些差别可以源于在功能的部件之间的功能的组的特定的补充，例如叶，根，茎和繁殖机关。测试部件对地区性的潮湿变化的互补回答，我们进行了多地点横断调查测量普通种类属于的植物个人尺寸和部件生物资源部分功能的组：在在 2010 种季节的山峰的北西藏的高原上的非禾本草本植物，草，荚和薹。沿着吝啬的年度降水(地图) 坡度，我们取样了 70 种类， 20 在高山的草地在是， 20 在高山的大草原， 15 在里面高山荒芜大草原并且 15 在高山的沙漠分别地。我们的结果证明高山的植物的尺寸与比 1.0 g 主要低的单个生物资源是小的。植物在单个水平越过高山的草地使保守部件部分相对。然而，在到潮湿变化的功能的部件之间的互补回答明确地在功能的组之中不同。这些结果显示那功能的组差异可以是为从个人放大生物资源分配模式直到社区水平的一个有效工具。因此，在鉴定和区别上执行集中、系统的研究必要、珍贵在生态系统上的功能的组的组合变化的影响主要服务和过程。

英文摘要：

Variations in the fractions of biomass allocated to functional components are widely considered as plant responses to resource availability for grassland plants. Observations indicated shoots isometrically relates to roots at the community level but allometrically at the species level in Tibetan alpine grasslands. These differences may result from the specific complementarity of functional groups between functional components, such as leaf, root, stem and reproductive organ. To test the component complementary responses to regional moisture variation, we conducted a multi-site transect survey to measure plant individual size and component biomass fractions of common species belonging to the functional groups： forbs, grasses, legumes and sedges on the Northern Tibetan Plateau in peak growing season in 2010. Along the mean annual precipitation （MAP） gradient, we sampled 7o species, in which 2o are in alpine meadows, 20 in alpine steppes, 15 in alpine desert-steppes and 15 in alpine deserts, respectively. Our results showed that the size of alpine plants is small with individual biomass mostly lower than 1.0 g. Plants keep relative conservative component individual responses moisture functional fractions across alpine grasslands at the level. However, the complementary between functional components to variations specifically differ among groups. These results indicate that functional group diversity may be an effective tool for scaling biomass allocation patterns from individual up to community level. Therefore, it is necessary andvaluable to perform intensive and systematic studies on identification and differentiation the influences of compositional changes in functional groups on ecosystem primary services and processes.