Functional identity is the main driver of diversity effects in young tree communities.
Functional identity is the main driver of diversity effects in young tree communities.
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DOI：
10.1111/ele.12600
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发表时间：
2016-06
期刊：
影响因子：
8.8
通讯作者：
Cornelia M. Tobner;A. Paquette;D. Gravel;P. Reich;L. Williams;C. Messier
中科院分区：
文献类型：
--
作者：
Cornelia M. Tobner;A. Paquette;D. Gravel;P. Reich;L. Williams;C. Messier
生态位互补效应和选择效应是解释生物多样性与生态系统功能关系的两个主要效应。两者都可以分别使用社区的功能多样性（FD）和功能身份（FI）进行功能定义。在此，我们提出的结果从第一个树的多样性实验中分离的选择的效果，通过改变社区组成在高密度地块沿着梯度的FD，独立的物种丰富度和测试的影响FD和社区加权平均性状（代理FI）干生物量增量（代理生产力）的互补性。经过4年的增长，大多数混合物没有不同的生产力，从各自的单作平均值，但有些确实超额显着。这些积极的多样性效应主要来自选择效应，主要是由快速增长的落叶物种和相关性状驱动的。净多样性效应没有随着时间的增加超过4年。
Two main effects are proposed to explain biodiversity-ecosystem functioning relationships: niche complementarity and selection effects. Both can be functionally defined using the functional diversity (FD) and functional identity (FI) of the community respectively. Herein, we present results from the first tree diversity experiment that separated the effect of selection from that of complementarity by varying community composition in high-density plots along a gradient of FD, independent of species richness and testing for the effects of FD and community weighted means of traits (a proxy for FI) on stem biomass increment (a proxy for productivity). After 4 years of growth, most mixtures did not differ in productivity from the averages of their respective monocultures, but some did overyield significantly. Those positive diversity effects resulted mostly from selection effects, primarily driven by fast-growing deciduous species and associated traits. Net diversity effect did not increase with time over 4 years.