Correlation analysis was performed between vegetation indices
and structural parameters of dry tropical forests including the
Shannon Index and results are presented in Table 4. It is evident from the results that the NDVI was positively correlated with LAI,
density, basal area, and Shannon index; there was a negative
correlation between different vegetation indices, except NDVI.
(Figs. 4 and 5). Among the parameters studied—Shannon index,
LAI, density, and basal area—were strongly correlated with
NDVI and highly significant at both the 1 and 5 percent levels, as
compared to other vegetation indices. NDVI was best fitted based
on higher r2
values for all the structural and diversity parameters
in the dry tropical forest of Chhattisgarh (Table 4).