Download Symbiotic Relationships

Interactions Between Species
Engage
• Symbiotic Circle
Explore
Clip 1
Clip 2
Clip 3
Write down in your own words the way the organisms
relate to one another in the videos
Who is benefited, harmed, or neither?
Explain
Symbiotic 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.
Parasitism
Leeches attach to host
organism and suck its
blood!
The host is harmed and
the leech is benefited
by a free meal!
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.
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.
What’s the relationship?
Oxpecker and Zebra
• Oxpeckers
obtain a meal
while the Zebra
is freed of lice,
ticks, and flees.
What’s the relationship?
Plover Bird and Crocodile
• While obtaining a
meal, the Plover bird
cleans the crocodile’s
teeth and helps
prevent infections.
Tick on a Human
Elaborate
Malaria Virtual Tour
• Malaria Life Cycle
• http://malaria.wellcome.ac.uk/node40036.html
Evaluate
• A symbiotic relationship that occurs when
both member benefit is called?
Spanish Moss on Tree
• The Spanish moss benefits, but the tree is
neither harmed or benefited.
Which best represents
mutualism?
•
•
•
•
Bull snake/mouse
White-tailed deer/grass
Hummingbird/blossom
Spadefoot toad/cricket
What symbiotic relationship is it?
• An oakworm catepillar feeds on the leaves
of an oak tree. This type of interaction is: