Agriculture reduces species diversity by:

1. Converting woodland and hedgerows into fields reduces the numbers of species and destroys habitats
2. Favouring a few species with desirable features, leaving less space and resources for other species and creating monocultures
3. Use of pesticides
4. Use of inorganic fertilisers and runoff of effluent into water courses
5. Absence of crop rotation creating a monoculture and depleting nutrients in soil

1. Removal of hedgerows
2. Removal of woodland
3. Creating monocultures
4. Filling in ponds
5. Draining marshes
6. Over-grazing of land

1. Maintaining hedgerows
2. Reducing pesticide use
3. Using organic fertilisers
4. Using crop rotation

These methods can increase species and habitat diversity without substantially impacting food costs or yields.

The growing human population leads to increased deforestation, overuse of resources, agriculture, pollution, and climate change, all of which disrupt ecosystems and reduce biodiversity.

Deforestation is the permanent removal of forests for logging and to create space.

Deforestation reduces the number of trees and animal species in an area, and forces animals to migrate, affecting biodiversity.

A monoculture is the practice of planting a single crop over a large area.

A monoculture reduces biodiversity by eliminating the variety of plant species in that area.

1. Melting of polar ice caps removes habitat for many polar organisms, possibly leading to extinction
2. Rising sea levels may lead to flooding of terrestrial habitats in low-lying land
3. Changes in plant and animal populations due to migration
4. Spread of tropical diseases

Some plant species may fail to survive, leading to drought-resistant species becoming more dominant.

This could lead to the loss of some animal species that are dependent on the absent plant species as a food source.

Insects are pollinators of many plants, so if the range or biodiversity of insect populations change, this could affect the lives of the plants they usually pollinate. This would lead to extinction of those plant species.