- Brazil has the greatest species diversity, a smaller proportion of its land is protected than in Tanzania, in Tanzania 39.6% of the land is designated National Parkland.
- Species diversity is of crucial importance because:
- Plants photosynthesise.
- Trees act as a carbon sink.
- Some species purify water, fixing nitrogen, recycling nutrients and waste.
- Insects pollinate crops.
- In all three biomes the natural environments are threatened by population growth and economic development.
