Dataset 1. Microbial and metabolite effects on fly traits. A. Fly nutritional indices, microbial abundance, and whole-body SCFA content from microbial association experiment. NA = sample lost; ND = concentration not determined Columns A-D represent sample meta data associated with each fly Falcon tube. Columns E-J are sample data associated with nutritional indices (pool of 5 flies). Fly weight is measures as mg per fly, while the total content [μg] of each nutritional index is normalized by fly weight [mg]. Columns K-M are microbial abundance data associated with pool of 2 flies based on the colony forming unit (CFU) per fly. Columns N-U are titer (μmol normalized to fly weight [g]) and scaled values of measured SCFAs for each experimental replicate (pool of 10-20 flies [ca. 20 mg]). Data are provided in a .csv and .xlsx file formats.