Application of Loreau & Hector's (2001) partitioning method to complex functional traits
Article first published online: 9 AUG 2013
© 2013 The Authors. Methods in Ecology and Evolution © 2013 British Ecological Society
Methods in Ecology and Evolution
Volume 4, Issue 10, pages 954–960, October 2013
How to Cite
Grossiord, C., Granier, A., Gessler, A., Scherer-Lorenzen, M., Pollastrini, M., Bonal, D. (2013), Application of Loreau & Hector's (2001) partitioning method to complex functional traits. Methods in Ecology and Evolution, 4: 954–960. doi: 10.1111/2041-210X.12090
- Issue published online: 7 OCT 2013
- Article first published online: 9 AUG 2013
- Accepted manuscript online: 25 JUN 2013 10:48AM EST
- Manuscript Accepted: 16 JUN 2013
- Manuscript Received: 15 JAN 2013
- European Union Seventh Framework Programme. Grant Number: FP7/2007–2013
- French National Research Agency through the Laboratory of Excellence ARBRE. Grant Number: ANR-12-LABXARBRE-01
- INRA Nancy in the framework of the FunDivEUROPE
- biodiversity effect;
- BIOTREE ;
- carbon isotope composition;
- complementarity effect;
- selection effect;
- water use efficiency
- In 2001, Loreau and Hector proposed a method to calculate the effect of biodiversity on ecosystem-level properties that distinguished selection effects (SE) from complementarity effects (CE). The approach was designed and has been widely used for the study of yield in mixed-species situations taking into account the relative abundance of each species in ecosystem-level yield. However, complex functional traits commonly used to integrate ecosystem-level properties that cannot be analysed like yield data because the weighted contribution of each species is not determined by its relative abundance.
- We adapted the original method by clearly identifying ecologically meaningful weighting coefficients to represent species-specific contributions to ecosystem function.
- We applied the adapted method of analysis to tree foliar carbon isotope composition in an experimental plantation in order to test the influence of species richness on plot water use efficiency (WUEplot). The appropriate weights for the WUEplot of each species are leaf CO2 assimilation rate.
- We observed a large range of WUEplot and biodiversity effects among plots. The absence of a significant SE on WUEplot indicated that the overall net biodiversity effect was primarily driven by a CE. The net biodiversity effect and CE were mostly negative, suggesting that interspecific interactions resulted in a decrease in the ratio between carbon acquisition and transpiration at the ecosystem level.
- The application of the method to complex components of ecosystem functioning provides important new insights into the practical and conceptual aspects of functional biodiversity research.