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SPECIES
INTERACTIONS
COMPETITION

What do organisms
compete for?
2 Types of Competition
 Intraspecific
 Occurs
between
members of the
same species
 Interspecific
 Occurs
between
members of
different species.
COMPETITION
GAUSE
C
O
N
N
E
L
L
REDUCING COMPETITION BY
RESOURCE PARTITIONING
MacArthur
Different species need same resources
Finches
BATS EAT THE INSECTS IN
THE AIR, LIZARDS EAT THE
INSECTS ON THE GROUND
Resource Sharing can lead to
CHARACTER DISPLACEMENT
Differences develop between similar species due to competition
Similar species need similar or same resources
Large beaked can eat all size seeds, but will eat larger to reduce competition
With those that can only eat small or medium
PREDATION
and
and
Species Interactions
Predator - Prey

Predator/Prey
Relationships

Cheetah and Wildebeest
http://www.youtube.com/wat
ch?v=rXO3h6bpEUU&feature
=related

Baboom/Flamingo
http://www.youtube.com/wat
ch?v=b995_dC6iDM
Physiological
Structural
Coral Snake
(venomous)
Viceroy
(edible)
Scarlet King
(non-venomous)
Red next to Black - safe for Jack;
Red next to Yellow - kill any fellow.
Monarch
(inedible)
Mimicry


Mimic Octopus
http://www.youtube.co
m/watch?v=7Zh50pfG7
d8
(a)A flower mantid
in Malaysia
(b)A stick mantid
in Africa
Cryptic Coloration
PLANT - HERBIVORE
Poison Ivy
Carrion Flower
Plants for Medicinal Purposes
Soothes
Or
laxative
anemia
cleanser
Good sleep
Laxative (skin)
Diarrhea (no skin)
SYMBIOSIS




3 types:
Parasitism
Mutualism
Commensalism
PARASITISM
Ectoparasites
Endoparasites

Maggots in my head
http://www.youtube.com/watch?v
=V2Ac6RYSvo8&feature=channel

Parasite in Lungs
http://www.youtube.com/watch?v
=Im_5xQu5GbA&feature=channel
MUTUALISM


Caterpillar and ant
http://www.youtube.com/watch?v=
z3bWqlPLpMg
Buffalo and Egret
http://www.youtube.com/watch?v=
8BEKrc-aXF8
COMMENSALISM

Shark and Remora
http://www.youtube.com/w
atch?v=e4xrdeagyYM
SUCCESSION
Primary Succession

http://www.pbs.org/wgbh/nova/
nature/crisafulli-blast-zone.html

http://www.youtube.com/watch?v
=k03vxRYsJ4Y
Secondary
Succession