Projects per year
There is now ample evidence that biodiversity stabilizes aggregated ecosystem functions, such as primary production, in changing environments. In primary producer systems, this stabilizing effect is found to be driven by higher functional resistance (i.e., reduced changes in functions by environmental changes) rather than through higher functional resilience (i.e., rapid recovery following environmental changes) in more diverse systems. The stability of aggregated ecosystem functions directly depends on changes in species composition and by consequence their functional contributions to ecosystem functions. Still, it remains only theoretically explored how biodiversity can stabilize ecosystem functions by affecting compositional stability. Here, we demonstrate how biodiversity effects on compositional stability drive biodiversity effects on functional stability in diatom communities. In a microcosm experiment, we exposed 39 communities of five different levels of species richness (1, 2, 4, 6, and 8 species) to three concentrations of a chemical stressor (0, 25, and 250 μg/L atrazine) for four weeks, after which all communities were transferred to atrazine-free medium for three more weeks. Biodiversity simultaneously increased, increasing functional and compositional resistance, but decreased functional and compositional resilience. These results confirm the theoretically proposed link between biodiversity effects on functional and compositional stability in primary producer systems, and provide a mechanistic underpinning for observed biodiversity-stability relationships. Finally, we discuss how higher compositional stability can be expected to become increasingly important in stabilizing ecosystem functions under field conditions when multiple environmental stressors fluctuate simultaneously.
- Ecosystem functions
- Primary production
DE LAENDER, F. & KULKARNI, D.
1/07/15 → 1/07/16
1/01/14 → 31/12/16
Project: Research Axis
DE LAENDER, F., Baert, J. M., Janssen, C. & Sabbe, K.
1/10/12 → 30/09/16
Biodiversity, chemicals, and ecosystem functioning. Colloquium of the Institute for Environmental Sciences
Frédérik De Laender (Invited speaker)5 Feb 2015
Activity: Talk or presentation types › Invited talk
Frédérik De Laender (Contributor)10 Aug 2014
Activity: Participating in or organising an event types › Participation in conference