What are the 5 Major Causes of Biodiversity Loss?

By meenakshi|Updated : August 3rd, 2022

The 5 major causes of biodiversity losses are overexploitation (extreme hunting and fishing pressure), habitat loss, invasive species, climate change (associated with global warming), and pollution. These causes can be man-made or natural. However, human activities play a direct role in biodiversity loss.

5 Major Causes of Biodiversity Loss

Biodiversity loss is the disappearance or the decline of biological diversity. It can happen because of the following reasons-

  • Habitat loss- It refers to the fragmenting, thinning, or outright destruction of an ecosystem’s plant, nutrient, soil, and hydrological resources. The habitat loss puts plants and animal species at risk. 
  • Overexploitation-  Overexploitation is the process of harvesting a large amount of terrestrial or aquatic animals. As a result, some species' stock gets depleted or extinct. Examples of overexploitation are overfishing and extreme hunting. 
  • Invasive species- Invasive species are also known as non-native species. They are introduced to an environment to put the native species at risk, ultimately leading to extinction. 
  • Climate change- Climate change associated with global warming is responsible for increasing the global temperature. It is also responsible globally for raising the greenhouse gas level. The increased levels of carbon dioxide in the atmosphere might affect biodiversity.
  • Pollution- Pollution of water, air, and soil leads to many problems that further increase biodiversity destruction.

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FAQs on major causes of biodiversity loss

  • Habitat loss, Overexploitation, Invasive species, Climate change, and Pollution are the 5 major causes of biodiversity loss. 

  • The biodiversity loss is highest in Latin America & Caribbean. It has seen the highest drop in biodiversity at 94%. It has declining amphibians, reptiles, and fish populations.

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