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Species Interactions
(Symbiosis)
Mutualism
Both species
benefit
A+
B+
Commensalism One benefits from A +
Bo
Zebra and tick bird
other
Epiphytes
Amensalism
One species is
harmed by other
Grazing stock
trampling plants
A o
B -
Exploitation
One benefits at
expense of other
Predation,
Herbivory,
Parasitism
A +
B-
Antibiosis
One is harmed by
a compound the
other produces
Thyme plant
releasing toxins
A o
B -
Competition
Both species are
harmed
Plants competing
for light
A -
B -
Activity
1. Look at card
2. Identify the type of interaction
3. Explain how each species is affected in
terms of survival and food resources
Text Book
• Read pg 22-23
• Highlight key words
• What is the difference between parasitism
and parasitoids?
• Answer Q6 pg 26