Table 1.
Values of H2’, plant species richness, entomophilous plant species richness, number of entomophilous plants in hoverfly pollen, number of pollen taxa, and values of d’ for pollen loads carried by 11 species of hoverfly at three grassland sites in west Wales, July–August 2014.
| Species | CAD | LLC | TRE | Mean d' | Stand. Dev. | Total n Hoverflies | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H2’ | 0.19 | 0.12 | 0.24 | |||||||||
| Site plant species richness | 64 | 75 | 67 | |||||||||
| Entomophilous plant species richness | 33 | 39 | 31 | |||||||||
| Entomophilous plant species also present in hoverfly pollen | 13 | 17 | 13 | |||||||||
| No. Pollen Taxa | d' | n | No. Pollen Taxa | d' | n | No. Pollen Taxa | d' | n | ||||
| Cheilosia illustrata | 0 | 16 | 0.23 | 6 | 8 | 0.17 | 3 | 0.20 | 0.04 | 9 | ||
| Eristalis arbustorum | 0 | 22 | 0.09 | 2 | 0 | 2 | ||||||
| Eristalis horticola | 24 | 0.08 | 9 | 38 | 0.04 | 11 | 13 | 0.19 | 1 | 0.10 | 0.08 | 21 |
| Eristalis intricaria | 7 | 0.00 | 1 | 0 | 0 | 1 | ||||||
| Eristalis nemorum | 12 | 0.09 | 3 | 28 | 0.03 | 3 | 31 | 0.14 | 8 | 0.09 | 0.03 | 14 |
| Eristalis pertinax | 26 | 0.12 | 25 | 31 | 0.04 | 6 | 17 | 0.09 | 4 | 0.08 | 0.04 | 35 |
| Eristalis tenax | 12 | 0.10 | 3 | 33 | 0.06 | 10 | 21 | 0.17 | 2 | 0.11 | 0.03 | 15 |
| Rhingia campestris | 24 | 0.19 | 8 | 12 | 0.37 | 1 | 8 | 0.15 | 2 | 0.26 | 0.12 | 11 |
| Sericomyia silentis | 23 | 0.21 | 14 | 17 | 0.19 | 5 | 12 | 0.24 | 5 | 0.21 | 0.03 | 24 |
| Sericomyia superbiens | 16 | 0.32 | 5 | 0 | 11 | 0.12 | 2 | 0.22 | 0.14 | 7 | ||
| Volucella bombylans | 10 | 0.15 | 1 | 0 | 15 | 0.20 | 3 | 0.18 | 0.04 | 4 | ||
| Total n | 69 | 44 | 30 | 143 | ||||||||