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Relationships
between
organisms
Competition
More than one organism
tries to make use of the
same limited resource
Predator / Prey
One species (prey) is
hunted as food for
another (predator)
Symbiosis
A close relationship
between two species
Three types…
Mutualism
Relationship where
both species benefit.
Win - Win
Commensalism
Relationship where
one species benefits
and the other is unaffected
Parasitism
Relationship where one species
(parasite) benefits
and the other species (host) is harmed.
“Living
Together”
“Friends
and
Rivals”
What would happen if
we changed just one
variable in an
ecosystem?
Biotic
Abiotic
Biomes
Biomes
Big Cottonwood Canyon
Snowbird Ski Resort
Little Mountain
Moab
Great Salt Lake
Biome,
Sweet
Biome
Hula Hoop Habitat
Magnification
of
DDT
Feral Pig
Golden Eagle
Island Fox (Urocyon littoralis)
Island Fox
 Pre-1963:
1000’s
in the Channel
Islands
Island Fox
 Post-1963:
steady decline
in Island Fox
population
Island Fox
 Some
Island
Fox subspecies now
extinct (in the
wild)
Island Fox
 Santa
Cruz
Island – from
1500 to 100
individual
foxes
Golden Eagle
 Relocating
Golden Eagles
helps, but .. .
 More migrate
in to replace
them.
Golden Eagle
 Time
is of the
essence.
 100 to 30 in the
next couple of
years.
Bald Eagle
Eagle vs. Eagle
Balance of Nature Returning
96% Survival Rate
Current Science Events
 Local
Practice Affecting
Ecosystems
and
 Global Practice
Affecting Ecosystems
‘N Cyst
A sea monkey’s no monkey or
chimp.
It’s crustacean – better known as
brine shrimp.
This genus, Artemia,
Can deal with extremia.
As a cyst stage, it’s hardly a wimp.
- C. Drewes
Brine Shrimp Lab
Hee
Hee