Table 1. Species diversity of floral resources and the number of flowering species in the fixed plots in each census. As an index of species diversity, Shannon-Wiener’s H’ values are shown. In total, flowering of 81 species was observed in the plots throughout the survey periods and was classified into bee-visited (N = 21), fly-visited (N = 53), and unclear (N = 7) according to their floral visitors.
Plant species 2017 2017 2017 2018 2018 2018
Early Middle Late Early Middle Late
All species H’ index 2.61 3.71 3.73 2.81 4.39 3.34
(81 spp.) No. species 23 46 43 35 56 44
Bee-visited species H’ index 0.31 2.55 2.14 0.98 3.26 1.38
(21 spp.) No. species 3 13 14 7 18 16
Fly-visited species H’ index 2.38 2.75 3.15 2.32 3.44 3.01
(53 spp.) No. species 19 29 28 26 34 28