INTERACTION_DATA.xlsx

We
visited each farm at three time points: in early (18th–30th
June) and late (30th July–10th August) summer 2016 when
WFS were in bloom, and during the following spring before the onset of WFS
flowering (from 25th March to 9th April 2017). We
recorded flower density and diversity on two to three transects per farm and
time point,
depending on the flower provision at the time we performed the survey.
Transects of
100 m length and 2 m width were
selected for high abundance and richness of flowers and insect visitors within
the farm. When present, we prioritised WFS in summer.
When no WFS were flowering, other transects were performed on other non-cropped
field boundary
features such
as hedgerows. Transect locations were adjusted as necessary across time points.
In total, 55
summer transects were performed, including 28 on WFS,
and 27 on other field margins with no sown flowers. In
spring 2017, we performed transects either on hedgerows including perennial
trees and shrubs, on field margins with perennial flowering plants such as Lamium album, or on
flowering oilseed rape crop fields. The spring floral
data includes only flower diversity, as density cannot be reliably estimated
for large flowering trees such as Prunus
sp. and Salix sp., which
represent important pollinator resources.