The relationship between biodiversity and ecosystem functioning is one of the most currently acclaimed ecological topics. One remarkable aspect of tree communities in tropical forests and savannas is the concentration of individuals into few species or simply the species stem dominance. In addition, species dominance in biomass and productivity are indicators of how much it can affect ecosystem processes. Here, we investigated if tree species dominance in abundance is followed by a dominance in biomass and productivity, and if there is consistence in the functional traits associated to dominance in biomass, productivity, and stem abundance in neotropical savannas of Central and Southeastern Brazil. Our findings showed slightly stronger functional (biomass and productivity) dominance compared to the abundance dominance, with 3.4 and 4.2% of the species accounting for 50% of the biomass and productivity, respectively, and 4.3% of the species accounting for 50% of the individuals. There were overlaps, but mostly mismatches, between dominant species lists for biomass, productivity, and abundance, especially in the top three species. We found that the same traits which make a species capable to deal with savanna environmental odds (i.e., adaptations) and achieve high abundance, also make it possible for this species to reach larger diameters and consequently dominance in biomass. Species relative contributions to productivity responded to bark thickness, wood density and maximum potential size. The fact that just a few species concentrate most savanna trees, biomass, and productivity show a high level of adaptation of this species to the environmental conditions found in this biome. Regardless, the conservation of the entire pool of species is crucial because climate change, land use and species invasion might cause shifts in the vegetation structure and function.

生物多样性与生态系统功能之间的关系是目前最受好评的生态话题之一。热带森林和热带稀树草原中树木群落的一个显着方面是个体集中在少数物种中，或者只是物种的茎优势。此外，生物量和生产力中的物种优势是它对生态系统过程影响程度的指标。在这里，我们调查了树种的丰度优势是否紧随生物量和生产力的优势，以及与巴西中部和东南部新热带稀树草原的生物量、生产力和茎丰度优势相关的功能性状是否一致。我们的研究结果显示，与丰度优势相比，功能（生物量和生产力）优势略强，分别为 3.4 和 4。2%的物种分别占生物量和生产力的50%，4.3%的物种占个体的50%。在生物量、生产力和丰度的优势物种列表之间存在重叠，但主要是不匹配，尤其是在前三个物种中。我们发现，使一个物种能够应对稀树草原环境几率（即适应）并实现高丰度的相同特征，也使该物种有可能达到更大的直径，从而在生物量中占据主导地位。物种对生产力的相对贡献取决于树皮厚度、木材密度和最大潜在尺寸。事实上，只有少数物种集中了大部分稀树草原树木、生物量和生产力，这一事实表明该物种高度适应该生物群落中的环境条件。