Threats to biodiversity

1
Threats to biodiversity

• 1. habitat destruction
• conversion of natural habitats to urban,
  agricultural, industrial areas.
• simplification of natural habitat removal of
  dead wood channelization of rivers cultivation
  of one or few species

2
Threats to biodiversity

• 1. habitat destruction
• fragmentation of natural habitats - not enough
  area to sustain populations of certain species,
  increase in edge habitat

forest
urban
3
Threats to biodiversity

• 2. introduction of invasive exotic species
  species not native to an area, but once
  introduced, can reproduce in the wild
• outcompete native species
• prey on native species

4
Threats to biodiversity

• 3. pollution
• chemical
• thermal
• noise
• eutrophication addition of nutrients to a
  normally low-nutrient aquatic habitat

5
Threats to biodiversity

• 4. overharvesting
• food
• medicine
• timber, paper products
• exotic pet trade

6
Threats to biodiversity

• 5. human population explosion
• exacerbates all other threats

7
Human population explosion
Inequality in the distribution of resources and
wealth is the real problem The wealthiest 20 of
the worlds population consumes 85 of all goods
and services and produces 54 of all CO2
emissions. The poorest 20 of the worlds
population consumes 1 of all goods and services
and produces 3 of all CO2 emissions