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This study found that while the total magnitude of productivity was largely determined by the species present, functional diversity was a good predictor of overyielding.
AUTHORS: Griffin, J.N., Méndez, V., Johnson, A.F., Jenkins, S.R. and Foggo, A.
DATE: July 2008
This study determined the effect of a continuous measure of function diversity (functional attribute diversity or the degree of functional differentiation based on four functional traits) on the magnitude of net primary productivity and overyielding of two alternative null-models. Researchers conducted a field experiment using one vs two-species mixtures of rock pool macroalgae and found that while the total magnitude of productivity was largely determined by the species present, functional diversity was a good predictor of overyielding. Additionally, the positive relationship between functional diversity and overyielding was consistent in both additive and substitutive null-models.
As such, the results indicated that continuous measures of functional diversity can be a strong supplement to predicting biotic effects on ecosystem functioning. Cited in 58 other studies, this publication has influenced studies around the world in better understanding local and global functional diversity.