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Do Now. 1. Arctic foxes live in very cold climates. Which of the following is a biotic factor that may impact them? a) Cold temperatures b) Heavy snow c) Strong wind d) Number of lemmings (their prey ) - PowerPoint PPT Presentation
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1. Arctic foxes live in very cold climates. Which of the following is a biotic factor that may impact them?
a) Cold temperaturesb) Heavy snowc) Strong windd) Number of lemmings (their prey)
2. You discover a group of oxen and birds that live in the same area. This is an example of a(n)
a) ecosystemb) biospherec) populationd) biological community
3. Think about friendship. What are some benefits that you get from friendships?
DO NOW
UNIT 9: ECOLOGY
HOW DO LIVING THINGS
INTERACT WITH THEIR
SURROUNDINGS?
SWBAT differentiate between different forms of symbiotic relationships
TODAY’S OBJECTIVES
VIDEO 1: GIRAFFES & OXPECKERSH T T P : / / A N I M A L . D I S C O V E RY. C O M / T V - S H O W S / A N I M A L - P L A N E T- P R E S E N T S / V I D E O S / T O P - 1 0 - O D D - A N I M A L -C O U P L E S -T H E - G I R A F F E S - OX P E C K E R . H T M
Video is not embedded; use the link above
VIDEO 1: GIRAFFES & OXPECKERS
1.How did the relationship between the two organisms help the giraffe?
2.How did the relationship between the two organisms help the bird?
They have harmful ticks removed.
They get a free meal!
What are they?When two different species live closely together
SYMBIOTIC RELATIONSHIPS (SYMBIOSIS)
Three types of symbiosis:MutualismCommensalismParasitism
SYMBIOTIC RELATIONSHIPS (SYMBIOSIS)
What is it?An interaction between two species that benefits both.
(“win-win”)
MUTUALISM
Example: Flowers and insects
The insects help spread pollen to make new plants.The flowers give the insects food
MUTUALISM
What is it?An interaction between species that benefits one and does not harm the other.
Yay! I don’t mind!
COMMENSALISM
Example:The remora fish and a shark
The remora fish suctions on to the shark for a free ride.
The shark doesn’t mind!
COMMENSALISM
What is it?One organism benefits but the other organism is harmed.
Alright! Boooo!
PARASITISM
Example:Mistletoe and Trees
Mistletoe is a plant that latches on to trees and steals food from them. The mistletoe benefits, but the tree is harmed.
PARASITISM
Looking back at the video, what type of symbiotic relationship are the giraffe and the oxpecker in? Explain.
>> CHECK FOR UNDERSTANDING
Mutualism, because BOTH organisms benefit!
Predation is when a predator seeks out and eats another organism (called a prey)
Don’t get confused with parasitism
PREDATION: NOT A SYMBIOTIC RELATIONSHIP!
VIDEO 2: THE TONGUE-BITERSH T T P : / / A N I M A L . D I S C O V E RY. C O M / T V - S H O W S / A N I M A L - P L A N E T- P R E S E N T S / V I D E O S / T O P - 1 0 - O D D - A N I M A L -C O U P L E S -T H E - G I R A F F E S - OX P E C K E R . H T M
Video is on the Animal Planet website
VIDEO 2: THE TONGUE-BITERS
1. What type of symbiotic relationship do the snapper and the “tongue biter” have? How do you know?
2. What type of symbiotic relationship do you have with the bacteria in your mouth? How do you know?
Parasitism, because one organism (the tongue-biter) benefits, while the other is harmed
Mutualism, because you both benefit!
EXPLORING SYMBIOSIS
With your group, go to each station and decide what type of symbiotic relationship exists in each situation
You have 90 seconds to decide!