A study in Melbourne, Australia compared invertebrate species richness and diversity in streetside bioretention swales, garden beds, and lawn-type planting strips. Bioretention swales contained the greatest species richness and diversity, followed by garden beds and lawn-type green spaces.
Kazemi, Fatemeh, Simon Beecham, and Joan Gibbs. (2009). Streetscale bioretention basins in Melbourne and their effect on local biodiversity. Ecological Engineering, 35(10), 1454-1465.