Fig. 5 provides the mean counts
for all six runs for both pollen types and illustrates the distance
decay relationship for both lily and freesia pollen and also shows
the mean similarity between both pollen types which indicates that
they are exhibiting similar behaviour.
Fig. 6 demonstrates the spatial trend of pollen distribution in a schematic diagram. The room in which the experiment was conducted was
mapped onto a grid and the sampling locations positioned within that
grid to provide an indication of the variation across space. This diagram
exhibits the distance decay relationship very clearly and also illustrates
the zone of high pollen count for both lily and pollen around each vase.
These findings concur with those of Morgan et al. [1] mentioned
previously.
These findings indicate that the presence of cut flowers in a room
will lead to the distribution of pollen grains around a room and certain areas will have high concentrations of these pollen grains that
will be available for transfer should a contact be made. It also demonstrates that different monocot pollen types generally exhibit similar
spatial trends in a room. This has implications for the collection
phase of a forensic investigation; given the availability of pollen
grains for transfer to a suspect, should a contact have been made
with surfaces within the room it will usually be worthwhile to collect
trace pollen evidence from a wide variety of surfaces within that
room for subsequent comparison with clothing seized from a suspect.