The Effects of Deforestation (Edexcel IGCSE Biology)

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Lára Marie McIvor

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Deforestation

  • Deforestation is the clearing of trees on a large scale, usually to provide land for agriculture or development

  • Undesirable effects of deforestation include:

Effect

Explanation

Leaching

Soil minerals are not taken up by trees and are instead washed away by rain into nearby bodies of water

Soil erosion

Soil is not held together by tree roots and organic matter, so is more likely to be washed and/or blown away

Water cycle disturbance

The removal of trees reduces the release of water vapour into the atmosphere by transpiration, reducing cloud formation and rainfall

Carbon cycle disturbance and increased global warming

The removal of trees reduces photosynthesis, so less carbon is removed from the atmosphere and stored in plant tissues

Combustion of felled trees increases release of carbon dioxide into the atmosphere

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Lára Marie McIvor

Author: Lára Marie McIvor

Expertise: Biology Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.