Download Symbiosis - Byron Senior High School

Symbiosis
The living together of two different organisms
Neutral
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Not taking part or giving assistance when it
comes to organisms living together.
Gets along with other organisms, but do not
give assistance to life in any way
Commensalisms
•
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A symbiotic relationship between two organisms
of different species in which one benefits while the
other is unaffected.
Remora’s attaching to a shark
Barnacles on a whale
Birds on a cow
Mutualism

An interaction between two or more species in
which both species benefit from the other.
Acacia Tree – Ants live in the horns
and bring nutrients to the tree while the
tree gives them protection off the
ground.
Interspecific Competition
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Introduction: Interspecific competition refers to the
competition between two or more species for some limiting
resource.
This limiting resource can be food or nutrients, space, mates,
nesting sites-- anything for which demand is greater than
supply.
A lion fending off a hyena
for food.
Predation

A predator is an animal or other organism that
hunts and kills other organisms, called prey,
for food in an act called predation.
OUCH!!!!
Parasitism
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A symbiotic relationship in which one
organism lives off of the other organism, but
does not kill it.

Parasites (mosquitoes & Head Lice)
Competitive Exclusion
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States that two species that compete for the
exact same resources cannot stably coexist.
One of the two competitors will always have
an ever so slight advantage over the other that
leads to extinction of the second competitor in
the long run
Predation vs. Parasitism
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Predation – a species sets out to kill another
species in order to survive
Parasitism – a species feeds off another
organism, but does not kill it, this way it will
have a food source as long as it stays alive
Resource Partitioning
What is it?
Resource partitioning occurs when species require different parts of the
same resource. Resource partitioning helps competing species share a
resource and develop a niche for themselves in an ecosystem.
Give me an example!
Let's say you have a healthy population of insects and you have bats and
lizards that both want to eat the bugs. Since the bats fly and the lizards
crawl on the ground, they could share the bugs with resource partitioning:
The bats would eat the bugs they catch in the air, and the lizards would take
care of the ones they could reach on the ground.
Camouflage
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A method that allows certain species to blend
in with the environmental surroundings for
protection.
Warning coloration
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Is a means of natural defense employing
conspicuous colors, sounds, or other methods
by which an organisms openly projects a
warning signal to potential predators
It wants to be noticed…Notice “Stay Away!”
Mimicry
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is any species that has evolved to appear
similar to another successful species in order
to dupe predators into avoiding the mimic, or
dupe prey into approaching the mimic.
A mimic generally resembles its target in one
or more of the following: appearance,
behavior, and habitat.
Coral Snake
(poisonous)
Milk Snake
Fly or Wasp?
Thick-headed fly
Hawk Moth