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Updated: Jun 25, 2026
08:16
Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
Published on: March 13, 2014
Multifunctionality is affected by interactions between green roof plant species, substrate depth, and substrate type
Yann Dusza1, Sébastien Barot1, Yvan Kraepiel1
1Sorbonne Universités UPMC Univ. Paris 06 IRD, CNRS, INRA, UPEC Univ. Paris Diderot Institute of Ecology and Environmental Sciences-Paris iEESParis Paris France.
Ecology and Evolution
|April 14, 2017
Summary
Green roof ecosystem services depend on plant and substrate interactions. Deeper, artificial substrates increased biomass and water retention, but natural soils enhanced transpiration and reduced nitrate leaching, showing trade-offs in green roof multifunctionality.
Area of Science:
- Urban ecology
- Environmental science
- Horticultural science
Background:
- Green roofs offer ecosystem services like evapotranspiration and nutrient cycling.
- These services are influenced by plant species, substrate type, and depth.
- Interactions between these factors on green roof multifunctionality are not fully understood.
Purpose of the Study:
- To investigate how interactions between substrate type and depth affect green roof ecosystem functions.
- To assess the impact of plant species and families on these functions.
- To understand the drivers of green roof multifunctionality.
Main Methods:
- A pot experiment simulating green roof conditions.
- Planting 20 species from 5 families on natural vs. artificial substrates at 10 cm vs. 30 cm depths.
- Measuring biomass, nutrient content, transpiration, water retention, and leachate quality.
Main Results:
- Substrate type and depth interactions significantly altered ecosystem functions.
- Artificial substrates and greater depths increased biomass and water retention.
- Natural soils promoted higher transpiration and reduced nitrate leaching, except for Fabaceae species.
- Plant species and families modulated functions, with notable trade-offs observed.
Conclusions:
- No single factor combination optimized all ecosystem functions, indicating trade-offs.
- Interactions between substrate type and depth are key drivers of green roof multifunctionality.
- Understanding these interactions is crucial for designing effective green roofs.
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