Name of organisation
French Natural History Museum
About the project
The French Natural History Museum is involved in Regreen’s Work Package 3, on the “Mapping and modeling of ecosystem services” provided by Nature-Based Solutions. Our main goals were to i) map green roof biodiversity, ii) model links between biodiversity, ecosystem services, and green roof construction/management, and iii) develop a guide for green roof creation.
We are working on a scoring system for green roof characteristics (biodiversity, ecosystem services, design and management); we hope this will offer managers a useful tool in deciding what types of green roofs to construct in urban areas, depending on their objectives and circumstances.
We are currently still in the mapping and modelling stage. Initial results suggest that:
– Semi-extensive green roofs support the greatest biodiversity (particularly in terms of plant communities).
– Green roof age doesn’t significantly affect biodiversity composition (although our sample was limited to 36 roofs, the majority of which were relatively new).
– Substrate type and depth have a key impact on the water retention capacity of green roofs, the optimal threshold being 25cm depth