Terrestrial molluscs in Nee Soon swamp forest 
119 
Fig. 3. Average Shannon-Weiner Index (H’) of terrestrial snails and slugs at all survey sites. 
Fig. 4. Average Species Richness (R) of terrestrial snails and slugs at all survey sites. 
of these land snails. The sampling method also plays a part in the observed low 
abundance. The handpicking sampling technique is limited, focuses sampling only 
from the ground level up to vegetation as high as two metres, and might miss very tiny 
or well camouflaged specimens. Many of the arboreal species that dwell in the canopy 
are not recorded. The lack of soil and leaf litter sieving sampling method also misses 
out on species that dwell within the soil. 
