Table 1.
Summary of information about research sites, colonies, and sampling frequency
| Year | Number of sites (apiary) | Pollen traps per site (apiary) | Frequency of pollen sampling/ colony inspection | ||
|---|---|---|---|---|---|
| Jul. | Aug. | Sep. | |||
| 2015 | 10 | 1 | 5/2 | 3/2 | 2/1 |
| 2016 | 10 | 1 | 4/2 | 3/2 | 1/1 |
| 2017a | 7 (4)b | 2 | 2/1 | 2/2 | 3/2 |
| 7 (3) | 2 | 5/2 | 4/3 | 3/2 |
aIn 2017, the two subsets of sites (four vs three) has different sampling frequency, and we use average pollen per date to account for the variation in sampling frequency. Pollen abundance data from all the seven sites were used for analysis.
bTaxon richness of plants as pollen source from the subset of four sites were used for analysis.