Fertile forests produce biomass more efficiently

S. Vicca*, S. Luyssaert, J. Peñuelas, M. Campioli, F.S. III Chapin, P. Ciais, A. Heinemeyer, P. Högberg, W.L. Kutsch, Beverly E. Law, Y. Malhi, D. Papale, S.L. Piao, M. Reichstein, E.D. Schulze, Ivan A. Janssens

*Corresponding author for this work

    Research output: Contribution to JournalArticleAcademicpeer-review


    Trees with sufficient nutrition are known to allocate carbon preferentially to aboveground plant parts. Our global study of 49 forests revealed an even more fundamental carbon allocation response to nutrient availability: forests with high-nutrient availability use 58±3% (mean±SE; 17 forests) of their photosynthates for plant biomass production (BP), while forests with low-nutrient availability only convert 42±2% (mean±SE; 19 forests) of annual photosynthates to biomass. This nutrient effect largely overshadows previously observed differences in carbon allocation patterns among climate zones, forest types and age classes. If forests with low-nutrient availability use 16±4% less of their photosynthates for plant growth, what are these used for? Current knowledge suggests that lower BP per unit photosynthesis in forests with low- versus forests with high-nutrient availability reflects not merely an increase in plant respiration, but likely results from reduced carbon allocation to unaccounted components of net primary production, particularly root symbionts.

    Original languageEnglish
    Pages (from-to)520-526
    Number of pages7
    JournalEcology Letters
    Issue number6
    Publication statusPublished - Jun 2012


    • Biomass production
    • Biomass production efficiency
    • Carbon allocation
    • Global forest database
    • Nutrients
    • Photosynthesis
    • Root symbionts


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