Authors: Pham, Michelle; Spring, MaLisa;Sivakoff , Frances;Gardiner, Mary;

Urban green spaces provide important habitat and ecosystem services. In post-industrial legacy cities like Cleveland, Ohio (USA), built structures are demolished as people leave these cities, resulting in newly vacant land. Vacant land constitutes an opportunity to establish low-cost green infrastructure (GI) that provides ecosystem services. Our objective was to determine whether investments in GI can support stormwater management and pollinator habitat. 2 GI treatments were implemented in Cleveland, Ohio from 2014 to 2016: rain gardens (low-cost) and bioswales (high-cost). Rain gardens were mulched depressions containing water tolerant forbs. Bioswales were created by constructing channels seeded with a variety of perennials. We hypothesized that investments in low and high-cost GI could enhance local bee biodiversity. Pollinators were sampled for three years (June-August) using bee bowls and yellow sticky card traps. Vegetation variables were also measured. Generalized linear mixed models evaluated if pollinator species varied with treatment, habitat variables, and observation date. Preliminary analyses demonstrate a similar abundance and species richness of pollinators across treatments. Further analyses will examine whether pollinator functional diversity varies with treatment. Our results suggest that GI can improve stormwater management without endangering urban bee biodiversity.