Fertile forests produce biomass more efficiently

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

    Research output: Contribution to journalArticleResearchpeer-review

    199 Citations (Scopus)

    Abstract

    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. © 2012 Blackwell Publishing Ltd/CNRS.
    Original languageEnglish
    Pages (from-to)520-526
    JournalEcology Letters
    Volume15
    Issue number6
    DOIs
    Publication statusPublished - 1 Jun 2012

    Keywords

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

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