Data from: Successional growth dynamics of woody saplings in tropical dry forest understory

Here, we examine relative growth rates (RGR) of woody species saplings along a broad successional gradient in a tropical dry forest based on height and basal area data gathered over 15 years of vegetation monitoring in permanent plots differing in successional age (1-73 years) plus a mature forest plot. We used mixed-effects models to examine the link between individual size, fallow age, and plant traits, and from this link model their relationship with sapling RGR. Overall, growth tended to be slow along the successional gradient, with the exception of the initial 10 years, during which most groups exhibited their highest growth rates. The key factors influencing basal area growth were the species' successional guild and their affiliation with the Leguminosae family. In contrast, growth in height was primarily shaped by successional guild and growth form. The widespread decline in sapling growth rates within the understory indicates that, in later stages of succession, light availability—rather than water—becomes the main limiting factor.