Plant-pollinator inference network of historic and recent bumblebee specimen by trnL-P6 pollen metabarcoding. Corbicula pollen was sampled from bumblebees caught in 1968/69 (blue) and bumblebees caught in 2019 (orange). In addition, body pollen was sampled from all bumblebees caught in 2019 (yellow). The width of the colored bars reflects the sum of unique interactions (i) with plant taxa for all specimen (n) of the respective sample type (color). The width of the black bars reflects the total number of bumblebee specimens (s) in which the respective plant taxa has been found. Plant taxa were ordered to minimize network overlap. To avoid clutter, plant taxa found in less than two samples and bumblebee species represented by less than two specimens were omitted. Taxa represented by family names showed insufficient resolution in the trnL-P6 maker (e.g., Asteraceae).