1. Bell Ringers What are 5 biotic factors in a deciduous forest?
What are 2 abiotic factors in a deciduous forest?
Extension: What would be an example of a predator and prey in a deciduous forest?

2. Biodiversity

3. Biodiversity within an Ecosystem
Biodiversity – variety of life on Earth
Can be within a particular habitat, ecosystem, or even within one species

4. Biodiversity within an Ecosystem
Every organism has a specific role to play in its environment
Niche – the way an organism fits into its ecosystem
An organism’s niche includes where it lives, what it uses, and what it eats

5. Biodiversity within an Ecosystem
No two species ever share the exact same niche
Why is that a good thing?

6. Biodiversity within an Ecosystem
What happens if one species dies off in an ecosystem?
EVERY organism (biotic factor) is affected!
Its predator populations would change
Its prey populations would change
Its fellow competitors’ (for food or habitat) populations would change

7. Biodiversity within an Ecosystem
If bees become extinct, are we next?

8. Biodiversity within an Ecosystem
What happens if one species dies off in an ecosystem?
Even nonliving things (abiotic factors) are affected!
Ex: how would soil change if a bacteria species died?
How would water change if a fish species died?
How would air change if a tree species died?

9. Biodiversity within an Ecosystem
It is possible that, with time, another species will take over another species’ niche and the ecosystem will live on
It is also possible that the death of one species could cause other species in the ecosystem to die as well, potentially eliminating the entire ecosystem!

10. Biodiversity within a Population
Review: Population – the number of individuals of a specific species living in a community
Within a species, there are multiple variations
Variation – inherited differences between organisms

12. Biodiversity within a Population
Adaptation – an inherited variation that helps an organism survive its environment

13. Biodiversity within a Population
Example: Peppered Moth
Two main variations: black and white
The ______ variation is more likely to survive on a tree with lichen because it ________ and is able to hide from predators
white
blends in

14. Biodiversity within a Population
However, during the Industrial Revolution, the black peppered moths began thriving while the white moths started dying out
Why?
The black moths blended better on the soot-covered trees

15. Adaptation Examples:
Remember: an organism’s adaptations are all about surviving its environment
Polar bears have thick fur coats to keep warm and light-colored fur to blend in with the snow
Fun fact: polar bears’ fur isn’t actually white; it’s clear!

16. Adaptation Examples:
An aloe plant stores its own water so it can survive in the desert and a waxy surface to prevent transpiration (evaporation of water from a plant)

17. Adaptation Examples:
Camouflage – ability to blend in with surroundings in order to hide from predators and/or sneak up on prey

18. iSpy!
See if you can point out the hidden organisms!

19. Leaf-Tailed Gecko

20. Spider

21. Frog

22. Snow Leopard

23. Bird

24. Copperhead Snake

25. Adaptation Examples:
Mimicry -- a harmless organism looking like a poisonous or dangerous one
Why would that be beneficial?

26. Adaptations https://www.youtube.com/watch?v=EJGtN-igCu8

27. Biodiversity within a Population
Variations and adaptations not only help individual organisms survive, but also the population as a whole
The Earth (and therefore environments and ecosystems) is always changing
Greater biodiversity within a population increases the chance that some individuals will possess variations that are suited to the new environment

28. Biodiversity within a Population
They will be able to survive, mate, and pass on those favorable traits to the next generation, potentially preventing the extinction of the species
Organisms without the favorable traits are less likely to survive and pass on their traits

29. Natural Selection
Natural Selection – favorable traits become more common and the less-favorable traits in a population disappear
What is going to happen to the green bug population?
What is going to happen to the orange/brown bug population?

30. Natural Selection
This change in population takes a LONG time, but eventually the population and the organisms look very different from their ancestors
Evolution – adaptations in a species over time

32. Biodiversity Affects Everything!
THE LINK DOES NOT WORK – Google “14 Wolves in Yellowstone” and watch the YouTube video
Watch the video, pausing when necessary to answer the questions (trust me)
Use the subtitles to help you!
When you get to the back, make sure you take your time!!!
Put in basket when you finish

35. Adaptation WS: Turn in when done.
Variation – what’s different among a species
Adaptation – diffs that benefit the species
Turn in when done.
Work on Biopshere Unit in Review Packet. Do questions 1-9, (omit for now)

37. Bellringer
Chickens eat corn. Snakes can eat chickens. Humans eat chicken and corn. Draw a food web. Label the producer (P), primary consumer (1), and secondary consumer (2). Label the carnivore (C), herbivore (H), and omnivore (O).
Sundew plant:

38. Bellringer Announcements
Test TUESDAY after long weekend. Start studying now!
All late/missing work due next Wednesday
SMART lunch today – make-up tests, test corrections, discuss missing work, questions about current material