SYMBIOSIS – two or more SYMBIOSIS – two or more species live together in a species live together in a

close, long-term associationclose, long-term association

•Parasitism – Parasitism – good for one species, bad for good for one species, bad for

hosthost

•Mutualism – both species benefit

Commensalism – one species Commensalism – one species benefits and the other is benefits and the other is

unaffectedunaffected

Symbiosis ActivitySymbiosis Activity

• I’m going to out you in groups of 3• You’re going to create 3 different types of

relationships from the organisms on the worksheet

• You need an example for each type of symbiotic relationship–Parasitism–Mutualism–Commensalism

Interspecific InteractionsInterspecific Interactions

CompetitionCompetition• Species directly competing for resource

-ex. In Africa, lions and hyenas compete for prey

PredationPredation• Predators have ways to find and eat their prey

examples – lions, snakes, spiders, centipedes

• Prey have ways to hide from or escape their predators

Camouflage: Poor-will (left), lizard (right)Camouflage: Poor-will (left), lizard (right)

Aposematic (warning) coloration in a poisonous blue frogAposematic (warning) coloration in a poisonous blue frog

Deceptive coloration: moth with "eyeballs"Deceptive coloration: moth with "eyeballs"

MimicryMimicry