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Interactions Between Species
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Engage
• Symbiotic Circle
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Explore
Clip 1
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Write down in your own words the way the organisms
relate to one another in the videosWho is benefited, harmed, or neither?
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ExplainSymbiotic Relationships
Commensalism: One organism is benefitted by relationship and the other is neither harmed nor benefitted.
Mutualism: Both organisms are benefitted by relationship and neither are harmed
Parasitism: One benefits and the other is harmed.
Predation: One organism preys or hunts the other organism.
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Parasitism
Leeches attach to host organism and suck its
blood!
The host is harmed and the leech is benefited
by a free meal!
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What’s the relationship?Woodpecker and Tree ants
• In the spring, the southern Rufous woodpecker and the black tree ant truce for a short while during egg laying.
• The ants protect the bird’s eggs from attacks by the nest
• The bird protects the ants’ nest from other birds while the chosen bird is nesting there.
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What’s the relationship?Cattle Egrets and Cattle
• Livestock movement cause insects to stir up in grazing fields.
• As the insects are stirred up, the cattle egrets following the livestock catch and feed upon them.
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What’s the relationship?Oxpecker and Zebra
• Oxpeckers obtain a meal while the Zebra is freed of lice, ticks, and flees.
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What’s the relationship?Plover Bird and Crocodile
• While obtaining a meal, the Plover bird cleans the crocodile’s teeth and helps prevent infections.
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Tick on a Human
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ElaborateMalaria Virtual Tour
• Malaria Life Cycle
• http://malaria.wellcome.ac.uk/node40036.html
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Evaluate
• A symbiotic relationship that occurs when both member benefit is called?
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Spanish Moss on Tree
• The Spanish moss benefits, but the tree is neither harmed or benefited.
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Which best represents mutualism?
• Bull snake/mouse
• White-tailed deer/grass
• Hummingbird/blossom
• Spadefoot toad/cricket
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What symbiotic relationship is it?
• An oakworm catepillar feeds on the leaves of an oak tree. This type of interaction is: