1. Define the term Biotic, then give an example

2. Ecology
Chapters 2, 3, 4 and 5

3. Principles of Ecology
Energy is required to cycle materials through living and nonliving systems

4. 2.1
Organisms and their relationships

5. 2.1 Organisms and their relationships
Ecology – the study of organisms and their relationships with their environments

6. Observations and analyses
Scientists study animals for many different reasons

7. The Biosphere The portion of earth that supports life
Several kilometers above the earth’s surface and several kilometers below the ocean’s surface

8. Biotic Factors
Living factors in an organism’s environment

9. What’s biotic here?
List all the living things

10. Abiotic
Nonliving factors in an organism’s environment

11. Abiotic?
List all the nonliving factors

12. Levels of Organization

13. Levels of Organization
Organism

14. Levels of Organization
Organism
Population

15. Levels of Organization
Organism
Population
Biological community

16. Levels of Organization
Organism
Population
Biological community
Ecosystem

17. Levels of Organization
Organism
Population
Biological community
Ecosystem
Biome

18. Levels of Organization
Organism
Population
Biological community
Ecosystem
Biome
Biosphere

19. Habitat
An area where an organism lives

20. Niche A role or position that an organism has in its environment
How does it make its living?

21. Community Interactions
Organisms in a community are constantly interacting

22. Competition
When more than one organism uses a resource at the same time

23. Predation
One organism consuming another organism for food.

24. Symbiotic Relationships
Mutualism

25. Symbiotic Relationships
Mutualism
Commensalism

26. Symbiotic Relationships
Mutualism
Commensalism
Parasitism

27. Compare and contrast biotic and abiotic

28. Flow of Energy in an Ecosystem
2.2 Autotrophs capture energy, making it available for all members of a food web.

29. Autotrophs
An organism that collects energy from sunlight or inorganic substances to produce food.

30. Heterotrophs
An organism that gets its energy requirements by consuming other organisms

31. Herbivore
A heterotroph that eats only plants

32. Carnivore
Heterotroph that prey on other heterotrophs

33. Omnivore
Organisms that eat both plants and animals

34. Detritivores
Eat fragments of dead matter in an ecosystem and return nutrients to the soil, air, and water.

35. Detritivores
Eat fragments of dead matter in an ecosystem and return nutrients to the soil, air, and water.
The only organism that eats every other organism

36. Models of Energy Flow

37. Trophic Level
Food chains
Each level or step

38. Trophic Level
Food chains
Each level or step
Autotrophs
Heterotrophs

39. Food Chain
A simple model
Shows energy
Shows flow

40. Food Web
Real life

41. Ecological pyramids
Model shows energy flow through an ecosystem

42. Ecological pyramids Model shows energy flow through an ecosystem
Pyramid of Energy
Pyramid of Biomass
Pyramid of Numbers

43. Cycles in the Biosphere
Terms

44. Matter
anything that takes up space and has mass

45. Nutrient
a chemical substance that an organism must obtain from its environment to sustain life and to undergo life processes.
A chemical that something needs, to be alive

46. Biogeochemical cycle
The exchange of matter through the biosphere

47. Biogeochemical cycles
The water cycle
The carbon and oxygen cycles
The nitrogen cycle
The phosphorus cycle

48. The Water Cycle
Organisms can not live without water

49. The Water Cycle

50. The Carbon and Oxygen Cycle
All living things are composed of molecules that contain carbon

51. The Carbon and Oxygen Cycle

52. The Nitrogen Cycle Proteins
Most nitrogen is found in the atmosphere as gas
Takes bacteria to capture and change it into a usable form
Nitrogen Fixation
Dentrification – fixed nitrogen back into nitrogen gas

53. The Nitrogen Cycle

54. Phosphorus Cycle
An essential element for growth and development of organisms
Short term
Long term

55. The Phosphorus Cycle