Which of your activities affect biodiversity ? List any three and note their effects :
Answers
Causes for biodiversity loss are:
(i) The major cause for the loss of biodiversity is habitat loss or destruction due to deforestation, overpopulation, pollution and global warming.
(ii) Over exploitation for commercialization.
(iii) Species extinction: It is a natural process by which biodiversity is affected.
(iv) Invasive species: The exotic species are introduced into the ecosystem. These species become established and threatens the local biodiversity.
The main threats facing biodiversity globally are: destruction, degradation and fragmentation of habitats. reduction of individual survival and reproductive rates through exploitation, pollution and introduction of alien species.
The core threats to biodiversity are human population growth and unsustainable resource use. To date, the most significant causes of extinctions are habitat loss, introduction of exotic species, and overharvesting. Climate change is predicted to be a significant cause of extinctions in the coming century.