3.3 Pollination efficiency
Overall, 242 pistils were analysed, 96 for Wollastonia
biflora , 77 for Tridax procumbens, and 69 for Scaevola
taccada . Only the interaction between local pollinator richness and
plant species identity resulted significantly and positively associated
with the number of pollen tubes counted on stigmas
(χ32 = 40.37; p < 0.001),
with different trends among the investigated species as highlighted in
Fig 4. Specifically, pollination efficiency increased inWollastonia biflora ( βi= 0.19; p= 0.001),and Scaevola taccada ( βi= 0.19 ; p=
0.002), while it was constant in Tridax procumbens
( βi= -0.02; p= 0.7).
[Fig. 4]