NATURE UNBOUND
LESSON 4 – INTERACTIONS
AMONG ORGANISMS
Conservation
Mr. Dieckhoff
WATCH THE FOLLOWING 3 INTERACTIONS BETWEEN
ANIMALS, WHAT IS DIFFERENT ABOUT EACH ANIMALS
INTERACTION WITH THE OTHER ANIMAL?
Turkey Buzzard & Bald Eagle:

https://www.youtube.com/watch?v=gjpiq0leaUs
Mink & Muskrat:

https://www.youtube.com/watch?v=qeo5moeV254
Bee & Purple Coneflower:

https://www.youtube.com/watch?v=rq7p9OpT56M
ANIMAL INTERACTIONS

 How would you categorize
Relationship between two or
the following interactions:
more organisms that affects
growth, survival, or reproduction
of participants

Categories
1.
Competition –

2.
Exploitation –

3.
Example – turkey buzzards & bald
eagle
Example – Mink killed the muskrat
Mutualism –

Example – bee and purple
coneflower
ORGANISMS COMPETE FOR LIMITED
RESOURCES

Competition –
Indirect competition –
 Intraspecific competition –
 Interspecific competition –

COMPETITION
MANAGEMENT
Competition
affects growth,
survival, &
reproduction
 Timber Stand
Improvement


https://www.yo
utube.com/watc
h?v=6BsI72_wVI
NICHE

Niche – describes everything affecting a
particular species’ existence, including the range
of environmental conditions the species can
tolerate, what the species needs to grow, survive
and reproduce, and how the species interacts
with its biotic and abiotic environment
Fundamental Niche –
 Realized Niche –

2 SPECIES CANNOT
HAVE THE SAME NICHE

Competitive Exclusion
Principle (Gause) –


Marine Example:
https://www.youtube.com
/watch?v=rZ_up40FZVw
Resource Partitioning –

Warbler Example:
https://www.youtube.com
/watch?v=LBFnJtTkV4c
EXPLOITATION

Benefits one organism but harms another
Predators –
https://www.youtube.com/watch?v=wFv0-TdIt3U
 Herbivores –
 Parasites –
 Host –

ADAPTATION IN EXPLOITATION

Adaptations either enhance or hinder an animals
ability to exploit another animal

Brood Parasite –
Brown Headed Cowbird:
https://www.youtube.com/watch?v=k3vAPMUW4CA
 Leave forest intact


Warning Coloration –
MIMICRY
Mimic –
 Model –

1.
Batesian Mimicry – mimic resembles a model

2.
Example: Clear Winged Moths
Mullerian Mimicry – model resembles another
model

Example: Viceroy & Monarch butterfly
COMMENSALISM

Commensalism –

Example – stick-tights (beggar ticks)
MUTUALISM

Symbiosis –
PREDATOR-PREY CYCLE
CONCLUSION
1.
2.
3.
4.
5.
6.
7.
8.
9.
Interactions
Competition
Affects of Growth
Management of Competition
Niche
Exploitation
Mimicry
Mutualism
Predator-Prey Cycle