1 / 10

Chapter 5 Biodiversity & Conservation

Chapter 5 Biodiversity & Conservation. Biodiversity is the variety of life in an area that is determined by the total number of different species. A lot of different species means a lot of biodiversity. Biodiversity is good for the environment

oke
Télécharger la présentation

Chapter 5 Biodiversity & Conservation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 5Biodiversity & Conservation

  2. Biodiversity is the variety of life in an area that is determined by the total number of different species. • A lot of different species means a lot of biodiversity. • Biodiversity is good for the environment • An ecosystem with biodiversity is a healthy one because it means that it is in balance and can support a lot of different organism The two areas with the greatest biodiversity are the rainforest & coral reefs.

  3. Biodiversity is good for humans because we get many different products from many different organisms. • Food: meat, eggs, milk, veggies • Medicine: penicillin • Clothing: cotton & hemp • Wood: lumber & paper • Oxygen: from plants • Protection: erosion, floods, good soil • Balanced ecosystems with biodiversity looks nice!

  4. Extinction (when a species is eliminated)  causes a decreasein biodiversity. Organisms have always naturally gone extinct BUT humans are causing them to go extinct MUCH faster by destroying the habitats organism live in… • Bulldozing land to make houses, roads & buildings • Polluting the land, water and air • Chopping down forests for wood & paper • Poaching animals

  5. LOSS OF BIODIVERSITY: • EXTINCT = the disappearance of a species when the last member dies • ENDANGERED = when numbers of a species become so low that extinction is possible.

  6. THREATENED = when a species is likely to become endangered • threatened  endangered  extinct

  7. Threats to Biodiversity • Habitat destruction / loss  • One of the biggest threats! • Ex. clearing the Amazonian rainforest for farming and for firewood • Habitat fragmentation  • The separation of wilderness areas from other wilderness areas • This creates “islands” of habitat

  8. Habitat degradation  • Damage to a habitat caused by air, water, or land pollution • Ex. Air pollution causes acid rain

  9. Ex. Air pollution has damaged the ozone layer, which blocks UV radiation • leads to more skin cancer

  10. Ex. Air pollution causes the GreenhouseEffect, which leads to global warming

More Related