The average weather condition at a specific place – plays a huge part in the composition and structure of a forest primarily because of its control over the biological activity. The impact of this ability in the forest is demonstrated in how it affects soil development in various ways. For example, as a tree grows, the sand beneath is altered via the actions of the roots, the microbe influx, plant debris, and its extracts, as well as percolating water. (Perry 1994, p. 271) Over time, the organisms within the tropical forests and the soil became interlinked.
Temperature, the degree of coldness or hotness in a region, is the most important factor for the tropical rain forest. Constant high temperature is crucial in the tropical climates, and the coldest month average temperature is around 18oC. Rainfall is the second most important factor for it, and which define different tropical climates. Due to minimum annual rainfall between 69 in and 79 in occurs in tropical rain forest climate, the tropical rainforests are considered a type of tropical wet forest. .
Rain forest experiences varying periods of the wet and dry season. It is from this climactic context wherein Walter and Lieth illustrated several major formations of the tropical rain forest, namely: monsoon forest. semi-evergreen rain forest. lowland evergreen rain forest. lower montane rain forest. upper montane rain forest. subalpine forest. health forest. peat swamp forest. freshwater swamp forest. . .
Monsoon forest and semi-evergreen forest have a common factor with seasonal in climate. .Monsoon forest, which has a long dry season followed by a season of heavy rainfall. The trees in a monsoon forest usually shed their leaves during the dry season and come into leaf at the start of the rainy season. .