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Research, Policy and Practice

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Table 4 Analytical characters of herbaceous vegetation in Kangayam tract

From: Evolution of sedentary pastoralism in south India: case study of the Kangayam grassland

Species Relative dominance (%) Relative density (%) Relative frequency (%) IVI
Aristida setacea 76.8 32.5 7.6 126.9
Cenchrus ciliaris 14.1 17.5 17.6 49.2
Brachiaria repens 2.8 7.5 11.7 22.0
Alysicarpus monilifera 0.9 7.5 5.8 14.2
Zornia gibbosa 1.0 7.5 11.7 20.2
Blumea sp. 2.8 17.5 17.6 37.9
Cyperus sp. 0.7 5.0 11.7 17.4
Heterotropiums 0.5 2.5 5.8 8.8
  1. Frequency: no. of plots in which a species occurs/total no. of plots × 100.
  2. Relative density (RD): no. of individual of a species/total no. of individual of all species × 100.
  3. Relative frequency (RF): frequency of a species/total frequency of all species × 100.
  4. Relative dominance (RDom): total basal area of a species/basal area of all species × 100.
  5. Importance value index: IVI = RD + RF + RDom.