Download Notes from Friday 5/1

Notes from Friday 5/1
Symbiotic Relationships:
• Symbiosis: living together with another
organism in close association
• Types of (symbiosis):
MUTALISM
PARASITISM
COMMENSALISM
1. Commensalism: one organism is benefited and
the other is unharmed
ex. barnacles on whales, orchids on
tropical trees
2. Mutualism: both organisms benefit from the
association
ex. nitrogen-fixing bacteria on legume
nodules, certain protozoa within termites
(also ruminants)
3. Parasitism: the parasite benefits at the
expense of the host
ex. athlete's foot fungus on humans,
tapeworm and heartworm in dogs
Symbiotic Relationships
Symbiosis- two species living together
3 Types of symbiosis:
1. Commensalism
2. Parasitism
3. Mutualism
Symbiotic Relationships
Commensalismone species
benefits and the
other is neither
harmed nor
helped
Ex. orchids on a
tree
Symbiotic Relationships
Commensalismone species benefits and
the other is neither
harmed nor helped
Ex. polar bears and
cyanobacteria
Symbiotic Relationships
Parasitismone species benefits (parasite) and the
other is harmed (host)
• Parasite-Host relationship
Symbiotic Relationships
Parasitism- parasite-host
Ex. lampreys,
leeches, fleas,
ticks, tapeworm
Symbiotic Relationships
Mutualismbeneficial to both
species
Ex. cleaning birds and
cleaner shrimp
Symbiotic Relationships
Mutualismbeneficial to both species
Ex. Lichen (fungus and algae living together)
Type of
relationship
Commensalism
Species
harmed
Parasitism
Mutualism
= 1 species
Species
benefits
Species
neutral