1
Q
biodiversity (2)
A
- number of species/species richness
- number of organisms within each species
2
Q
biodiversity varies based on environment (2)
A
- bright environment will support more plants/herbivores/carnivores as there is a higher light intensity so more plants
- more energy in an ecosystem produces more species/individuals so equatorial regions are more biodiverse than polar ones
3
Q
how biodiversity can vary over time (3)
A
- succession - over time an environment becomes more suitable for other species
- natural selection
- human influence
4
Q
human influence on biodiversity (4)
A
- farming/roads/industry destroyed rainforest habitats, extincting many species
- over-fishing depleted habitats and trawlers damage the ocean floor habitats
- misuse of land, i.e cattle-trampling, and increased temp has lead to more desert
- rivers polluted with industrial chemicals
5
Q
how biodiversity supports civilisation (3)
A
- small number of plant species providing staple foods
- medicinal drugs derived from plants/fungi
- living organism providing raw materials
