Mechanismsdefence

andsymbioticrelationships

Defencemechanisms

Adaptations that organisms develop or are born with that help

protect them against predators

try this: write down 2 examples of defence mechanisms from your prior knowledge

CO-EVOLUTION

how organisms have adapted to and become resistant towards

certain toxins

protective

Adaptations that help individuals avoid predation

through body coloration

coloration

CAMOUFLAGE

Dead Leaf ButterflyBrownish & veiny patterned wings that resemble a Leaf

warning coloration

Eastern Coral Snake(highly venomous)

mimicrya defence strategy used to imitate the warning colors

of other poisonous organisms

batesianinvolves a harmless

organism mimicking a HARMFUL one

Syrphid Fly

mülleriantwo or more poisonous species mimicking each

other

Poison Arrow Frog

Symbiosis

An ecological relationship between two

species living in direct contact

parasitismone species lives off of and harms

the host

parasitismone species lives off of and harms

the host

ectoparasites live outside

of their host

parasitismone species lives off of and harms

the host

ENDOPARASITES are typically unicellular organisms

parasitismone species lives off of and harms

the host

A PARASITOID IS A WASP

PARASITE THAT KILLS ITS HOST

Adzuki Bean Weavil Wasp

host-parasite cycle

refer to the activity page!

ectoparasite parasitoid

(tree)

mutualism

both species benefit from

the relationship

positive effect on growth of

both populations

mutualism

mutualism

refer to the activity page!

mutualistic relationship

COMMENSALISM

one species benefits,

the other is unaffected

commensal organism

obtains shelter,

locomotion, food, etc.

COMMENSALISM

COMMENSALISM

COMMENSALISMCompetitive : - / -

Host/Parasite : - / +

Predator/Prey : + / -

Mutualistic : + / +

Interspecific Interactions