Question

how deforestation has affected equatorial rain forest

Answer 1

The rate of erosion occurs from deforestation, because it decreases the amount of litter cover, which provides protection from surface runoff. The rate of erosion is around 2 metric tons per square kilometre. This can be an advantage in excessively leachedtropical rain forest soils.
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Answer 2

Deforestation, clearance, or clearing is the removal of a forest or stand of trees from land which is then converted to a non-forest use.[2] Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests.[3] About 31% of Earth's land surface is covered by forests.[4]

Deforestation can occur for several reasons: trees can be cut down to be used for building or sold as fuel (sometimes in the form of charcoal or timber), while cleared land can be used as pasture for livestock and plantation. The removal of trees without sufficient reforestation has resulted in habitat damage, biodiversity loss, and aridity. It has adverse impacts on biosequestration of atmospheric carbon dioxide. Deforestation has also been used in war to deprive the enemy of vital resources and cover for its forces. Modern examples of this were the use of Agent Orange by the British military in Malaya during the Malayan Emergency and by the United States military in Vietnam during the Vietnam War. As of 2005, net deforestation rates had ceased to increase in countries with a per capita GDP of at least US$4,600.[5][6] Deforested regions typically incur significant adverse soil erosion and frequently degrade into wasteland.

Disregard of ascribed value, lax forest management, and deficient environmental laws are some of the factors that lead to large-scale deforestation. In many countries, deforestation–both naturally occurring and human-induced–is an ongoing issue.[7] Deforestation causes extinction, changes to climatic conditions, desertification, and displacement of populations, as observed by current conditions and in the past through the fossil record.[8] More than half of all plant and land animal species in the world live in tropical forests.[9]

Between 2000 and 2012, 2.3 million square kilometres (890,000 sq mi) of forests around the world were cut down.[10] As a result of deforestation, only 6.2 million square kilometres (2.4 million square miles) remain of the original 16 million square kilometres (6 million square miles) of forest that formerly covered the Earth.[10] An area the size of a football pitch is cleared from the Amazon rainforest every minute, with 136 million acres (55 million hectares) of rainforest cleared for animal agriculture overall.[