TY - GEN A1 - Salazar Zarzosa, Pablo A1 - Diaz Herraiz, Aurelio A1 - Olmo, Manuel A1 - Ruiz-Benito, Paloma A1 - BarrĂ³n, Vidal A1 - Bastias, Cristina C. A1 - Garcia de la Riva, Enrique A1 - Villar, Rafael T1 - Linking functional traits with tree growth and forest productivity in Quercus ilex forests along a climatic gradient T2 - Science of The Total Environment N2 - Plant functional traits are highly plastic to changes in climatic factors and nutrient availability. However, the intraspecific plant response to abiotic factors and the overall effect on tree growth and productivity is still under debate. We studied forest productivity for 30 Quercus ilex subsp. ballota forests in Spain along a broad climatic gradient of aridity (mean annual precipitation from 321 to 858 mm). We used linear mixed models to quantify the effect of climatic and edaphic (soil nutrients, topography, and texture) factors on tree functional traits (leaf and branch traits), and subsequently, the effect of such functional traits and abiotic factors on the relative growth rate (RGR) of adult trees. We used piecewise structural equation models (SEMs) to determine the causal effect of intrinsic and extrinsic factors on forest productivity. Our results showed that tree functional traits were mainly explained by climatic and edaphic factors. Functional traits and tree biomass explained forest biomass and RGR, respectively, which ultimately explained forest productivity. In conclusion, intraspecific variability of functional traits has a significant effect on plant biomass and growth, which ultimately may explain forest productivity in Quercus ilex forests. Y1 - 2021 U6 - https://doi.org/10.1016/j.scitotenv.2021.147468 SN - 0048-9697 SN - 1879-1026 VL - Vol. 786 ER -