1. Endangered and Threatened Species
Chapter 10
Spring 2007

2. What is the importance of biodiversity?
Video – pretty antibiotics
Protecting biodiversity

3. A single pond in Brazil can sustain a greater variety of fish than is found in all of Europe's rivers.
A 25-acre plot of rainforest in Borneo may contain more than 700 species of trees - a number equal to the total tree diversity of North America.
A single rainforest reserve in Peru is home to more species of birds than are found in the entire United States.
One single tree in Peru was found to harbor forty-three different species of ants - a total that approximates the entire number of ant species in the British Isles.
The number of species of fish in the Amazon exceeds the number found in the entire Atlantic Ocean.

5. WHAT IS BIODIVERSITY?
Write your answer and explanation in the back of your notebook. Put the date and question on your paper.

6. Biodiversity Bio – Life Diversity - Different
How many species have been identified?
So far ONLY 1.75 million have been identified
Scientists estimate that 99.9% of all species that ever lived on earth are now extinct….
What does that mean for the species that are currently thriving?

7. WHAT IS BIODIVERSITY? – watch video and answer the questions as you watch.

8. Scientists study BIODIVERSITY
Genetic
Species
Ecosystem

9. Genetic Biodiversity
Genetic variation within a species

10. Genetic Variation

11. Species Variation – variation of species

12. Ecosystem Variation - Biomes

13. Biodiversity is…. The foundation for ecosystems stability…
All organisms have a niche that keeps the world in balance.. (predator – prey, consumer, producer, scavanger…etc.)
Symbiosis is a close relationship
Parasitism
Mutualism
Commensalism

14. Para – sit - ism Parasite feeds on the host.
Parasite benefits, host is harmed.

15. Both organisms benefit from the relationship.
Mu – tu – al - ism
Both organisms benefit from the relationship.

16. One benefits the other is unaffected.
Com – men – sal -ism
One benefits the other is unaffected.

17. BIODIVERSITY Number and variety of different species in an ecosystem.
Important for the STABILITY of communities and ecosystems.
Species Diversity
Ecosystem Diversity
Genetic Diversity

18. Species Diversity
All the difference between populations of species AND
different populations of species

19. Ecosystem Diversity
Variety of habitats , communities and ecological processes.
Without ecosystem diversity is it possible to have biodiversity?

20. Genetic Diversity
Diversity within members of a populations genetic traits
Necessary for adaptation and survival – WHY?
Necessary for preventing a bottleneck –
What is a bottleneck?

21. Black Footed Ferret

22. Endangered Species
When a species population is so low that it will probably become extinct if not protected.
Endangered Species Act (ESA) – Legislation put into effect to protect certain species – but many species have become extinct waiting to be added to the list.

23. Threatened Species
Species that’s populations has declined so low that if not protected will become endangered.
All species face some kinds of threats…name a few

24. WHAT Threatens Species Existence?
I do
YOU do
We do
HUMANS …….
(If that is what you are)
HOW ?

29. Exotic / Invasive Species
Exotic species that are introduced into an ecosystem they do not belong.
Non – native species often have no natural predators and take over the whole ecosystem and food web.
Simple – Free loaders, move in, eat all your food, make themselves at home and don’t leave you be.

30. Invasive Species Wrecking Havoc
Purple Loosestrife
Zebra Mussel
Gypsy Moth
Snakehead Fish

31. More Endangered / Threatened Species
Southern Leopard Frog
Eastern Spadefoot
Four Toed Salamander
Osprey
Small Footed Myotis

32. California Sea Otters
KEYSTONE SPECIES
Explain…

33. Sea Urchin and Kelp Beds

34. Siberian Tiger

35. Burrowing Owl

36. Macaws

37. Resources PA Game Comission www.pgc.state.pa.us
Environmental Protection Agency
U.S Geological Survey
Photos:
-wa.water.usgs.gov -