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Family Strong Relationships Final.ppt
1. Symbiotic Relationships
symbiosis - the relationship between two
different individual species that live together
in a close relationship (living together)
The word symbiosis can be broken down
into two parts to determine its meaning
sym means together
bio means life
2. Types of Symbiosis
There are three
types of symbiotic
relationships
Mutualism (+, +)
Commensalism (+, 0)
Parasitism (+, -)
Each relationship
can be shown using
+ , - , or 0
3. Mutualism mutualism - a
relationship where
both organisms
benefit
A + / + relationship
Think of a normal
friendship where
both friends gain
something from the
friendship
The acacia galls are homes to stinging
ants and the ants defend acacia from
other insects that would harm tree
leaves.
9. Mutualism
Algae and Fungi (Lichen) - Alga
gets water and nutrients from
the fungus and the fungus gets
food from the algae.
10. Mutualism
Many herbivores such as cows, sheep,
deer, horses and rabbits depend on
bacteria that live in their stomachs to
break down the plant material.
12. Commensalism
commensalism – a
relationship where one
species benefits while the
other species remains
unaffected
A + / 0 relationship
Think of a friendship
where one of the friends
benefits while the other
doesn’t change
Barnacles adhering to the skin of a
whale
13. Commensalism
One species uses a second organism
for housing such as small mammals
or birds that lives in holes in trees or
orchids which live in trees.
Orchid in rainforest Venezuela
17. Parasitism
parasitism – a relationship
where one organism
benefits (parasite) while the
species it depends on (host)
is harmed
host – an organism on
which a parasite lives
A + / - relationship
Think of a friendship where
you might feel used by your
friend
Parasitic isopod on fish
18. Parasitism
Ticks and fleas that live in a host
animal's fur bite the animal and
drink its blood are parasites.