Fig. 1 Hypothetical responses of bee visits (in transects) to
the amount of floral resources (FR) in the surrounding landscape in four
time periods over one season, with FR represented as grey bars, and bee
visits represented as black lines, with hypotheses depicted as follows:
H1 = bee visits are not influenced by the abundance of landscape FR; H2a
= bee visits are limited by the abundance of FR in the landscape during
the present time period, and are higher in time periods with higher FR;
H2b = bee visits are influenced by the abundance of FR in the landscape
during the present time period, but are lower in time periods with high
FR due to dilution of bees across the landscape; H3a = bee visits are
limited by the abundance of FR in a landscape in the first time period
(when foraging hypothetically begins), and by non-positive changes in FR
abundance in subsequent time periods relative to the first time period;
and H3b = bee visits in a given time period are limited by the
cumulative abundance of landscape FR over all previous time periods,
from when foraging began.