A dominant species that constitutes a large proportion of the biomass and which affects many other species

A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival

A common species that has plenty of biomass, yet has a fairly low impact on the community's organization

A rare species that has minimal impact on the biomass and on other species in the community

Chernozems – Richest soil in the world

Laterite – Contains aluminium compound

Terra rossa – Most suitable for roses

Black soil – Rich in calcium carbonate

Exponential phase

Stationary phase

Senescent phase

Lag phase

Grassland

Desert

Shrub land

Forest