What affects biodiversity 4.2.5 Flashcards
1
Q
Name 6 human factors that affect genetic diversity
A
- Pollution
- Loss of traditional species
- Urbanisation
- Habitat loss
- Herbicides and pesticides
- Monoculture
2
Q
How does deforestation reduce genetic diversity?
A
It reduces the number of species in an area as food sources and homes are destroyed. This further disrupts food chains
3
Q
How does agriculture reduce genetic diversity?
A
- Chemicals - herbicides and pesticides - reduces biodiversity by removing food sources for other animals
- Selective breeding - reduces genetic diversity
- Monoculture - many farms specialise in one crop. This reduces overall biodiversity in the area
4
Q
How does climate change reduce genetic diversity?
A
- Some species may migrate, causing a shift
- Those unable to migrate may become extinct
- Many species need a particular climate to survive
5
Q
Give 3 examples of the impacts of climate change
A
- Melting of polar ice caps
- Rising sea levels
- Coral bleaching
6
Q
When does coral die?
A
If water temperature changes by just 1 or 2 °C
