Figure 1.

Microcosm setup for three types of surface exposure under dry (0% RH), ambient (20%), and wet (100% RH) conditions (n = 3). Within each biological replicate, two technical replicate surfaces (both AM, both MR, or both Clay) were UV‐sterilized for 30 min, inoculated with 100 µL mixed inoculum, and kept in a single glass jar for up to 7 d. Within each glass jar, we assumed that a uniform and constant humidity level was achieved shortly after the jar was sealed