Why is the rainforests so luxuriant?

Answer 1

because there are specific climatic inputs and they influence the soil and vegetation growth.The climatic inputs include the sunlight,temperature and rainfall,they are correlated and influense each other.

Sunlight gives a strong insolation in tropical is an important factor to the remaining factors.Tropical rainforest locates between10 ¢XN to 10¢XS.Because the angle of insolation is high throughout the whole year ,so it can receive a strong and intense insolation in the whole year .So the temperature of tropical rainforest is constantly high and there is no extreme climate. They can receive enough sunlight, have photosynthesis to get a high vegetation productivity.

Temperature influenced by sunlight determines the growth of plants.When there is extreme weather condition,that means the annual range and daily range of temperature is very high,the growing season becomes short,vegetation easily wilts.But in tropical rainforests,the constant sunlight gives a moderate climate.This environment favours vegetation growth in the whole year and there is lack of seasonality.

The amount of precipitation also influence the vegetation growth.In the tropics,because of the intense heat brought by the sunlight,hot air rises rapidly and cool down.Relative humidity rises and air condenses to form rain clouds,so there are convection rains regularly and the annual rainfall is above 2500mm.As a result,there is enough moisture to support plants growth and favours photosynthesis.The vegetation productivity becomes high.