Page 563 - e-Book

Fig. 1: Graphical representation of IVI Value

cylindrical, Melanocenchris jacquemonlii and Sateria gluaca are the least frequently

occurring species with 4% frequency. The highest IVI (31.49) has been recorded of

Dichanthium annulatum and the lowest IVI (3.49) in Dactyloctenium aegyptum (see fig 1).
Diversity index of grass species

Richness or diversity of grass species has been indicated by Shannon diversity index
'
(H) with a value of 3.201, whereas Simpson index (D) value is 0.938. The higher evenness of
grass species has been computed a value of 0.428 which indicates high variation in

abundances between different taxa within the community. Value of standard deviation (SD)
(55.281) clearly shows the higher dispersion of the grass species (see table 2).

Table no.2 Diversity index of grass species in southern area of Jabalpur district (MP)
S. No. Indices Grass species

1 Shannon Index (H’) 3.201

2 Simpson index (D) 0.938
3 Pilou Evenness (J) 0.428

4 Standard Deviation (SD) 55.281

553