Tropical rain forest

 Rainfall exceeds 230 cm per year, and temperature is hot year-round, averaging 25 to 29C. 

 Tropical rainforests lie in a band around the equator within the tropics of Cancer and Capricorn (23.5° N and S). 

 Soils are commonly shallow and nutrient-poor

There is little seasonal variation in sunlight and temperature

Tropical rainforests are produced 40 per cent of NPP of terrestrial ecosystems.

TLS Online TPP Program

#Id: 5765

#Unit 10. Ecological Principles

Gini Simpson index of diversity (DGS) = 1 − DS.

DGS and species diversity are positive related

TLS Online TPP Program

#Id: 5766

#Unit 10. Ecological Principles

The Shannon index Direct related with Diversity and increases with addition of species and even distribution of species.

TLS Online TPP Program

#Id: 5767

#Unit 10. Ecological Principles

The Brillouin index

Brillouin index discriminates between these two communities with same richness and evenness  and the Shannon index does not.

TLS Online TPP Program

#Id: 5768

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5769

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5770

#Unit 10. Ecological Principles

Evenness is a measure of how diverse a community is relative to the maximum possible diversity

E=Hs/Hmax