1. HUMAN IMPACT

2. 1.Biodiversity is the variety of life in an area
that is determined by the number of
different species in that area.
2.Biodiversity increases the stability of an
ecosystem and contributes to the health
of the biosphere.

4. 3. Factors that Threaten Biodiversity
Biodiversity and Conservation
3. Factors that Threaten Biodiversity
The current high rate of extinction is due to the activities of a single species—Homo sapiens.
Humans are changing conditions on Earth faster than new traits can evolve to cope with the new conditions.

5. Biodiversity and Conservation
4. Overexploitation
Overexploitation, or excessive use, of species that have economic value is a factor increasing the current rate of extinction.
Bison
Passenger pigeons
Ocelot
Rhinoceros
Rhinoceros
Ocelot

6. Destruction of Habitat
Biodiversity and Conservation
5. Habitat Loss
If a habitat is destroyed or disrupted, the native species might have to relocate or they will die.
Destruction of Habitat
The destruction of habitat, such as the clearing of tropical rain forests, has a direct impact on global biodiversity.

7. Biodiversity and Conservation
6. Pollution
Pollution and atmospheric changes threaten biodiversity and global stability.
Biological magnification is the increasing concentration of toxic substances in organisms as trophic levels increase in a food chain or food web.

8. 7. Acid Precipitation (Rain)
Biodiversity and Conservation
7. Acid Precipitation (Rain)
Sulfur and nitrogen compounds react with water and other substances in the air to form sulfuric acid and nitric acid.
Acid precipitation removes calcium, potassium, and other nutrients from the soil, depriving plants of these nutrients.

9. Other organisms in the water suffocate.
Biodiversity and Conservation
Biodiversity and Conservation
8. Eutrophication
Eutrophication occurs when substances rich in nitrogen and phosphorus flow into waterways, causing extensive algae growth.
The algae use up the oxygen supply during their rapid growth and after their deaths during the decaying process.
Other organisms in the water suffocate.

10. Nonnative species that are either intentionally or unintentionally
Biodiversity and Conservation
9. Introduced Species
Nonnative species that are either intentionally or
unintentionally
transported to a new habitat are known as
introduced
species.
Introduced species often reproduce in large numbers because of a lack of predators, and become invasive species in their new habitat.

11. 10. Overuse of Natural Resources
Biodiversity and Conservation
10. Overuse of Natural Resources
The consumption rate of natural resources is not evenly distributed.

12. 11. Greenhouse Effect -Water vapor, carbon dioxide and methane can
be found throughout Earth’s atmosphere. These
greenhouse gases act as a blanket that slows
the release of energy and helps keep the
Earth at a temperature that can support life.

13. -As humans we are producing more greenhouse gases
(mostly carbon dioxide) increasing the greenhouse
effect and leading to global warming.

14. -Global warming is believed to be
contributing to many ecological disasters
such as increased flooding, stronger
tropical storms and ice cap melting. Each
of these are threats to global biodiversity.