Influence of spatial resolution and taxonomic level on model
performance
The contribution of the interacting species to the models was ranked
highest at 500 m resolution (cleptoparasitic bees) and 1 km (oligolectic
and polylectic bees) and at both taxonomic levels (fig. 2A; Appendix
S4). The optimal resolution of 500 m for the cleptoparasitic and 1 km
for the polylectic bees was significantly higher (p<0.05)
compared to the other resolutions except for the difference between 500
m and 1 km, which was not significant at both taxonomic levels (Appendix
S4). The oligolectic bees only showed a statistically significant
difference between the optimal resolution of 1 km and the extremes (100
m and 10 km).
In general, the contribution of the interacting species to the models
was higher when added at the species level for coarser resolutions and
at the genus level at finer resolutions. The contribution of the
interacting species was higher at the species level at a coarser
resolution from 5 km to 10 km and higher at the genus level from 100 m
to 1 km (fig. 2B; Appendix S4). This general trend was also shown at a
resolution from 100 m to 1 km for the cleptoparasitic bees, oligolectic
bees and the polylectic bees and at 5 km to 10 km resolution for the
models of the cleptoparasitic bees.
The percentage contribution of the interacting species was higher for
the cleptoparasitic bees compared to the oligolectic and polylectic
bees. This difference was statistically different for all resolutions of
the interacting species (Appendix S4). The oligolectic and polylectic
bees only showed a statistically significant difference at a 10 km
resolution with a higher contribution of the interacting species for the
oligolectic bees.