Extinction <ul><li>Not always negative </li></ul><ul><li>Loss of one species makes way for another </li></ul><ul><li>99.99...
Natural vs. Accelerated <ul><li>Natural extinction </li></ul><ul><li>Sudden env. disturbance of a huge  magnitude </li></u...
<ul><li>Accelerated Extinction ( man caused) </li></ul><ul><li>Called 6th mass extinction </li></ul><ul><li>Hunting/Agricu...
<ul><li>Background rate of extinction : </li></ul><ul><li>normal = 1 species every 5-10 years </li></ul><ul><li>today = 50...
<ul><li>Accelerated extinction </li></ul><ul><li>is caused by a species (us!) </li></ul><ul><li>taking place in only a few...
Causes of Accelerated Extinction <ul><li>Overhunting/overharvesting of plants </li></ul><ul><li>Habitat destruction </li><...
Extinct Species
Endangered Species
Invasive Species
Characteristics of Extinction Prone Species <ul><li>Low reproductive rate  </li></ul><ul><li>Specialized feeding habits </...
I have specialized feeding habits, large body size, am found only in one area  and  have a low reproductive rate!!! I know...
Upcoming SlideShare
Loading in …5
×

Extinction ppt student template

1,304 views
1,159 views

Published on

Extinction ppt to download

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,304
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
22
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Extinction ppt student template

  1. 1. Extinction <ul><li>Not always negative </li></ul><ul><li>Loss of one species makes way for another </li></ul><ul><li>99.999% of all species that have ever lived on earth are now extinct </li></ul>
  2. 2. Natural vs. Accelerated <ul><li>Natural extinction </li></ul><ul><li>Sudden env. disturbance of a huge magnitude </li></ul><ul><li>Puts immense pressure on orgs: those that can adapt survive, others perish </li></ul><ul><li>Ex: climate change </li></ul><ul><li>asteroid impact (dinosaurs) </li></ul><ul><li>There have been 5 natural mass extinctions </li></ul>
  3. 3. <ul><li>Accelerated Extinction ( man caused) </li></ul><ul><li>Called 6th mass extinction </li></ul><ul><li>Hunting/Agriculture 10,000 years ago was the beginning </li></ul><ul><li>75% of all extinctions today are caused by us </li></ul>
  4. 4. <ul><li>Background rate of extinction : </li></ul><ul><li>normal = 1 species every 5-10 years </li></ul><ul><li>today = 50,000 + every 5-10 years </li></ul><ul><li>UN Global Biodiversity Assessment team says @ current rate in 30 years we will lose 1/3 of all living things on planet if we don’t do something now! </li></ul>
  5. 5. <ul><li>Accelerated extinction </li></ul><ul><li>is caused by a species (us!) </li></ul><ul><li>taking place in only a few decades vs. 1000’s of years or eons of time </li></ul><ul><li>first time that plant species are disappearing at a faster rate than animals </li></ul>
  6. 6. Causes of Accelerated Extinction <ul><li>Overhunting/overharvesting of plants </li></ul><ul><li>Habitat destruction </li></ul><ul><li>Introduction of alien species </li></ul><ul><li>Pollution </li></ul><ul><li>Predator and pest control (pesticides..) </li></ul><ul><li>Disease </li></ul><ul><li>International trade in exotic animal and plant species </li></ul><ul><li>Illegal pet trade/ exotic plant collections </li></ul>
  7. 7. Extinct Species
  8. 8. Endangered Species
  9. 9. Invasive Species
  10. 10. Characteristics of Extinction Prone Species <ul><li>Low reproductive rate </li></ul><ul><li>Specialized feeding habits </li></ul><ul><li>Large size </li></ul><ul><li>Specialized breeding area or large territory needed </li></ul><ul><li>Found only in one area </li></ul><ul><li>Preys on livestock and people! </li></ul>
  11. 11. I have specialized feeding habits, large body size, am found only in one area and have a low reproductive rate!!! I know I’m cute…. … but am I doomed?

×