Leaf, stem and root tissue strategies across 758 Neotropical tree species
Leaf, stem and root tissue strategies across 758 Neotropical tree species
复制标题
DOI：
10.1111/j.1365-2435.2012.02020.x
复制
发表时间：
2012-10-01
影响因子：
5.2
通讯作者：
Baraloto, Christopher
中科院分区：
文献类型：
--
作者：
Fortunel, Claire;Fine, Paul V. A.;Baraloto, Christopher
1.功能性状之间的权衡揭示了主要的植物策略，可以让我们深入了解物种分布和生态系统过程。然而，目前的植物鉴定策略缺乏根结构性状与叶和茎性状的整合。2.我们研究了代表叶，茎和木本根组织的14个性状之间的相关性。对代表758种新热带树种的1084株树木的特征进行了测量，这些树木分布在13个地点，代表亚马逊河两端（法属圭亚那和秘鲁）三个广泛栖息地（季节性洪水、粘土硬地和白沙森林）所涵盖的环境变化。3.木质根性状与茎性状关系密切，但与叶性状关系不密切。叶，茎和木质根性状划定两个正交轴的功能权衡：第一轴定义的叶性状，对应于叶经济谱，和第二轴定义的协变茎和木质根性状，对应于木材经济谱。这些轴仍然是一致的，占物种进化史与遗传独立的对比。4.尽管强大的物种营业额跨网站，根和茎的结构性状之间的协变，以及它们的正交叶性状强烈一致的栖息地和地区。5.我们的结论是根结构特征反映干性状，而不是叶性状在新热带树木。叶和木材性状定义了一个综合的全株策略，在低地南美森林，可能有助于更全面地了解植物对全球变化的反应，在相关和建模方法。我们建议在扩大的环境和地理区域进行进一步的荟萃分析，以确定这种模式的普遍性。
1. Trade-offs among functional traits reveal major plant strategies that can give insight into species distributions and ecosystem processes. However, current identification of plant strategies lacks the integration of root structural traits together with leaf and stem traits. 2. We examined correlations among 14 traits representing leaf, stem and woody root tissues. Traits were measured on 1084 individuals representing 758 Neotropical tree species, across 13 sites representative of the environmental variation encompassed by three widespread habitats (seasonally flooded, clay terra firme and white-sand forests) at opposite ends of Amazonia (French Guiana and Peru). 3. Woody root traits were closely aligned with stem traits, but not with leaf traits. Altogether leaf, stem and woody root traits delineated two orthogonal axes of functional trade-offs: a first axis defined by leaf traits, corresponding to a leaf economics spectrum, and a second axis defined by covarying stem and woody root traits, corresponding to a wood economics spectrum. These axes remained consistent when accounting for species evolutionary history with phylogenetically independent contrasts. 4. Despite the strong species turnover across sites, the covariation among root and stem structural traits as well as their orthogonality to leaf traits were strongly consistent across habitats and regions. 5. We conclude that root structural traits mirrored stem traits rather than leaf traits in Neotropical trees. Leaf and wood traits define an integrated whole-plant strategy in lowland South American forests that may contribute to a more complete understanding of plant responses to global changes in both correlative and modelling approaches. We suggest further meta-analyses in expanded environmental and geographic zones to determine the generality of this pattern.