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Simone Fontana Department of Aquatic Ecology Eawag: Swiss Federal Institute of Water Science and Technology Títle: Regularity in the traits of individuals outcompetes other biodiversity metrics in explaining ecosystem properties Abstract: Biodiversity affects ecosystem properties through changes in the trait composition and variation of natural communities. Using phytoplankton data obtained across 28 lakes we found that trait evenness - the regularity in distribution of morpho-physiological traits of individual organisms - was the strongest predictor of community resource use and biomass yield. Our results suggest that elucidating the mechanisms linking individual-level trait variation to community dynamics could improve our ability to forecast changes in ecosystem properties across environmental gradients.

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