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Related Experiment Video

Updated: Jun 19, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Partitioning selection and complementarity in biodiversity experiments.

M Loreau¹, A Hector

¹Laboratoire d'Ecologie, UMR 7625, Ecole Normale Supérieure, 46 rue d'Ulm, 75230 Paris Cedex 05, France. Loreau@ens.fr

|July 14, 2001

Summary

This summary is machine-generated.

Biodiversity loss impacts ecosystem functioning. This study found that plant diversity enhances primary production in European grasslands, primarily through the complementarity effect, not species selection.

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Area of Science:

Ecology
Ecosystem Science
Biodiversity Research

Background:

Biodiversity loss is a critical ecological issue impacting ecosystem functioning and services.
Reduced species diversity may impair ecosystem processes like plant biomass production.
Interpreting these impacts is complex due to combined selection and complementarity effects.

Purpose of the Study:

To introduce a novel method for separating selection and complementarity effects on ecosystem processes.
To apply this method to the pan-European BIODEPTH experiment data.
To clarify the mechanisms by which plant diversity influences primary production.

Main Methods:

Developed an additive partitioning approach, analogous to the Price equation.
Applied the method to data from the BIODEPTH experiment across Europe.
Analyzed the contributions of selection and complementarity effects to plant biomass production.

Main Results:

The selection effect was, on average, zero, varying by locality based on dominant species' biomass.
The complementarity effect was consistently positive across the experiment.
This indicates niche differentiation or facilitation drives diversity-productivity relationships.

Conclusions:

Plant diversity positively influences primary production in European grasslands.
The complementarity effect, driven by niche differentiation and facilitation, is the primary mechanism.
The developed partitioning method effectively separates ecological effects.