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Defense Mechanisms
But first…..
A little practice
Habitat? Niche?
Habitat? Niche?
Habitat? Niche?
Habitat? Niche?
Habitat? Niche?
Habitat? Niche?
Another little refresher
Symbiosis
• All the relationships!
• Interactions between
organisms
Symbiosis
• Mutualism- both
species benefit from
a relationship.
• Lichens (fungus and
Algae)
Symbiosis
• Commensalism – One
member of a symbiotic
relationship benefits and
the other is neither
helped or harmed
Symbiosis
• Parasitism- One
creature benefits
and one creature is
harmed
• Ex tapeworm. Feeds
in a humans
intestines absorbing
his/her nutrients.
Predation
• Predation- when an
organism captures
and feeds on
another organism.
• Predator- hunter
• Prey- hunted
Competition
Intraspecific- same
population/species
Interspecific- two different
species
Keystone Species
• A keystone species is
one for which, if it
were removed from
its habitat, there
would be a dramatic
change in the species
diversity of that
habitat
Defenses!
Chemical Defense
• The Bomb
Physical Defense
• Spicebush Caterpillar
• A little Combo
defense might help
The art of a Camouflage
• Camouflage
• Symbiotic
relationships?
Territory
• Don't cross the line
Mimicry
• The best way to
survive is to look like
something you are
not!
Two Types of mimicry
• Batesian Mimicry is
when a harmless
species copies a
harmful species
• Mullerian Mimicry is
when TWO harmful or
unpalatable species
mimic each other.
• Meet the Master!
Just plain weird defenses
• Horned Lizard