Competition – “Battle at Kruger”

• Who is competing against whom?

• What are they competing for?

• What physical and biological factors affect their niche?

Who is competing against whom?

What are they competing for?

What physical and biological factors affect their niche?

Community Interactions

Mutualism

Cowbirds eat insects off cow

Parasitism – How is it different from predation?

Mosquito drinks blood from a human/animal

CommensalismDung beetle benefits, organism that provided

dung not helped/harmed

Janitors in nature! - Dung beetle uses other animals feces partially or exclusively for food

Mutualism

http://www.youtube.com/watch?v=0a3RuQQ0fYg

http://www.youtube.com/watch?v=l2-0wkUerqc

Parasitism

Commensalism

Cockleburs attach to fur of animals

Mutualism

What is the relationship between this hermit crab and the sea anemone riding on its back? …Is either (or both) helped, harmed, or neither?

- Protects crab from predators with its stinging tentacles

- Moves the sea anemone through water to help catch prey, or eats crabs leftovers

http://www.youtube.com/watch?v=6aKSq2i6UQM&feature=related

Commensalism

Whale and barnacles

Parasitism

Hookworms living in gut

Mutualism

Bee pollinating flower

Ecosystems song

• http://www.youtube.com/watch?v=GUY_-LK_lOc&feature=related

• See how many things you can find in the song that relate to what we’ve already studied/learned about ecosystems

Quiz time!

• Put materials away

• Spread out

• When finished, bring quiz to the front

• Begin writing reflection – Due Monday, if you don’t finish before you leave

Reflection

Write a reflection on “The Battle of Kruger” using complete sentences. Use the questions below to develop your reflection, but write it in paragraph form, not just answering each individual question! 

a. What did you think of the video?

b. What did you learn from the video?

c. Did it give you a deeper understanding of the relationship between organisms in a community? How?

d. Did it help to actually witness (via video) the interactions of a community versus reading about it or discussing it? How?

e. Would you like to see other videos that relate to our content as we progress through the semester?