Figure 2. Frequency of occurrence (bars) and biomass (line) of lantana in the MFDP from 1990–2008.

Light grey through dark grey represent the increasing density of lantana, i.e, from ‘absent’ through ‘present’, ‘common’ and ‘dense’ to ‘very dense’. The five density categories of lantana occurred with varying frequencies across the time period sampled; the lower density categories occurred less frequently and the higher density categories occurred more frequently with time. Gaps and dotted lines indicate fire years or missing data. The dry weight biomass of lantana is based on a study conducted in the year 2011. Note that for the purpose of analyses, the ‘absent’ and ‘present’ categories were combined to form the low-density ‘present’ category while the ‘common’ and ‘dense’ categories were combined to form a moderate density ‘common’ category.