The aim of this study was twofold: 1) to compare two different bio aerosol sampling techniques, polycarbonate filters, and Coriolis®µ and 2) characterise bioaerosols by the analysis of PLFA biomarkers in order to identify the microbial communities present in contrasting outdoor environments (a WWTP, compost facility, three different farms, 2 parks and an urban area). Sample collection efficiency was 34% greater when collecting air samples with polycarbonate filters than with Coriolis in recreational parks where...