1. ECOLOGY
Part 1

2. Ecology:the study of the interactions of living organisms with each other and their environment.

3. BIOSPHERE: the portion of Earth that supports life . . .
Air
Land
Water

4. Organic / Biotic Factors . . . (the living environment)
Plants
Animals
Protists
Bacteria
Fungi
(All living things containing carbon)

5. Inorganic /Abiotic factors . . . (the non-living environment)
Wind
Temperature
Moisture
Light
Soil
Minerals
Fire

6. Biotic vs Abiotic Factors
Bozeman Biology
10.02 min

7. Ecological (Energy) Pyramid
Omnivores eat anything
Carnivores eat meat
Insectivores eat insects
Herbivores eat plants
Producers make own food
Trophic level = feeding step

8. Niche: the role and position a species has in its environment
What it eats
Where it eats
When it eats

9. Food chain - shows how energy flows
producer
herbivore
omnivore
omnivore
producer
1st order consumer
2nd order consumer
3rd order consumer

10. Food web: interconnected food chains
Organisms almost always eat, and are eaten by, many different organisms.

11. chicken
grass
deer
caterpillar
hawk
frog
seeds
snake
beetle
coyote
turkey
human
rabbit

12. ECOLOGY
Part 2

13. Population: a group of organisms of one species that interbreed
and live in the
same place at the
same time.

14. Community:
A group of organisms of different species living together in a particular place.

15. The physical location in which a given species lives.
Habitat:
The physical location in which a given species lives.

16. Autotrophs/Producers Photosynthesis: (12:27 minutes)
How Energy Flows ….
Autotrophs/Producers Photosynthesis: (12:27 minutes)

17. How energy flows . . . Sun - main source of energy
Autotrophs / producers… can make own food
Heterotrophs / consumers… must eat
Decomposers / saprophytes… fungi & bacteria break down dead materials

18. Dead Stuff; It’s What’s for Dinner:
(3:51 min)

19. Symbiosis: close association between two or more organisms of different species.
Commensalism - one benefits, one isn’t affected (eg. Whale & Barnacles)
Mutualism - both benefit (eg. Insects & Plants)
Parasitism - one benefits, one is harmed (eg. Ticks & Dogs)

20. http://www.bozemanscience.com/050-populations/ (11:12 minutes)
Populations
(11:12 minutes)

21. Adaptation: the process by which a species becomes better suited to its environment.
Coloration
Speed
Migration
Thick fur
Chemical defenses
Hibernation/ Estivation
Size
Thorns and stickers

22. Cycles Within Ecosystems:
Water cycle – precipitation, evaporation and condensation
Carbon cycle – increasing carbon dioxide traps more heat and causes the “greenhouse effect.”
Nitrogen cycle – (next slide)

23. WATER CYCLE

24. CARBON CYCLE

25. Nitrogen cycle Nitrogen fixation is the conversion of…
“N” into usable organic compounds by bacteria
“N” from decaying organisms into ammonia
The release of “N” from organisms that are being decomposed.

26. NITROGEN CYCLE

27. THE END!