Understanding how ecological mechanisms influence local assembly of plant communities in tropical forest and, how do they vary along environmental gradients have been key questions in ecology. Different hypotheses have been proposed to explain the variation in trait distribution across an environmental gradient. In communities with high diversity, different ecological mechanism such as limiting similarity, habitat filtering and neutrality have been proposed to explained the species coexistences. Changes in these mechanism jointly environmental variables along the gradients have implication in the shape of trait distributions and functional composition of forest, however, the specific drivers of functional diversity across space are still unclear. The aim of this project is to assess how functional trait distribution is changing along an elevational gradient in the Colombian Andean forest and which ecological mechanism is governing the functional assemblage.