Distribution of A effective floral resources of S. japonicum, as surveyed in August 2019 (Current Floral Resource – CFR) and B respective metrics of M. sculpturalis activity density (Bees per Minute – BpM), both presented within the S250 framework (circular sectors – “landscapes” of r = 250 m; values shown in classes). Urbanistic zones (acronyms as in Fig. 1) are shown as background shades of grey, representing the averaged value of CFR per zone calculated either for A all 40 sectors or B only for 16 sectors with CFR ≥ 0.1. The location of the first find is marked with “2017”. Numerical data available in Suppl. material 3: Tables 3.2–S3.4; see also maps in Suppl. material 5 for the complete visualisation of floral resource metrics.