Some Unresolved Issues of Measuring the Efficiency of Pollinators: Experimentally Testing and Assessing the Predictive Power of Different Methods
Table 1
Number of pollen grains carried by different visitor species foraging on four plants.
Visitor species
Number of pollen grains carried by different visitor species foraging on four plants
Alfalfa
Toria
Carrot
Bath sponge
Andrena ilerda
-
1425 ± 10.1
-
-
Andrena leaena
-
-
1240± 9.3
-
Apis dorsata
1475 ± 9.3
1525 ± 11.9
-
-
Apis florea
nt
1335 ± 10.3
1205 ±8.6
1269 ± 5.8
Apis mellifera
1350 ± 11.9
1475 ± 13.6
-
-
Chalicodoma cephalotes
1235 ± 8.5
-
-
-
Chalicodoma rubripes
1310± 7.9
-
-
-
Megachile nana
1285 ± 10.3
-
-
-
Halictus sp.
-
-
-
1406 ± 8.7
Melissodes sp.
-
-
-
1835 ± 12.6
Syrphid flies
-
1210± 7.6
183 ±3.4
-
Xylocopa fenestrata
-
-
-
2850 ± 21.1
LSD (p<0.05)
21.78
20.6
13.8
77.3
Mean ± SE of 50 observations; values have been rounded off to the nearest whole number; nt= species acted as nectar thief; -: pollinator species was not present.
