1. 2.1 – Organisms and Their Relationships
Ecology
2.1 – Organisms and Their Relationships

2. Early Work 9/16
List all the types of organisms you have observed in your school/home environment
Make a diagram that shows how the organisms on your list interact with one another

3. Chapter 2
Principles of Ecology
Chapter Diagnostic Questions
The act of one organism consuming another organism for food is _______.
predation
parasitism
commensalism
mutualism D C B A
CDQ 1

4. from an autotroph to a heterotroph from a heterotroph to an autotroph
Chapter 2
Principles of Ecology
Chapter Diagnostic Questions
Identify how energy flows through an ecosystem in a typical food chain.
from an autotroph to a heterotroph
from a heterotroph to an autotroph
from a carnivore to an herbivore
from an omnivore to an herbivore D C B A
CDQ 2

5. Chapter 2
Principles of Ecology
Chapter Diagnostic Questions
What is a chemical substance that an organism must obtain from its environment to survive?
biomass
energy
matter
nutrient D C B A
CDQ 3

6. What is ecology?
Interview with an ecologist
Key Theme:

7. 2-1 What is Ecology?
Ecology… is the scientific study of the interactions of organisms with one another and their environment.
Scientists study ecology through…
Observing – create questions to study
“What species live here?
Experimenting – test hypotheses
Set up an artificial environment in lab to manipulate conditions in the natural world
Modeling - mathematical formulas based on data to make future predictions

8. The Biosphere The portion of earth that supports life
Includes both Biotic (living) and Abiotic (non-living) factors

10. Levels of Organization

11. Levels of Organization

12. Guess the Level A group of seniors at Crosspoint Academy
An eagle flying over campus
The soccer field and athletes at practice
Coniferous forest found in Washington and Great Britain
Cliques in the lunchroom
Voting Fingers
Organism
Population
Community
Ecosystem
Biome

13. Ecosystem Interactions
Habitat vs.
Niche
Where an organism lives
How an organism lives

14. Community interactions
Talk to your neighbor to brainstorm how organisms interact with one another…
Competition….for food, water, shelter, space
Predation…predator pursues the prey

15. Symbiosis
The close relationship that exists when two or more species live together
Match the following relationships with their definitions:
Mutualism
Parasitism
Commensalism
One organism benefits, the other isn’t helped or harmed.
Both organisms benefit from one another
One organism benefits while another is harmed

16. Which are biotic factors in a forest environment?
Chapter 2
Principles of Ecology
2.1 Formative Questions
Which are biotic factors in a forest environment?
plants and microscopic organisms living
pH and salt concentration of the soil
sunlight, soil type and soil nutrients
temperature, air currents and rainfall D C B A
FQ 1

17. Chapter 2
Principles of Ecology
2.1 Formative Questions
What is the name for a group of interacting populations that occupy the same area at the same time?
ecosystem
habitat
biological community
biotic collection A B C D
FQ 2

18. all of the biotic factors in an ecosystem
Chapter 2
Principles of Ecology
2.1 Formative Questions
Which defines habitat?
all of the biotic factors in an ecosystem
an area where an organism lives
an area in which various species interact
the role or position that an organism has D C B A
FQ 3