1. Levels of Organization & Relationships (2.1)
State Standard
SB4A. Investigate the relationships among organisms, populations, communities, ecosystems, and biomes.

2. Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
Ecology
Scientific discipline in which the ________________ among living organisms and the interaction the organisms have with their _______________ are studied.
Ecologists ______________, _____________, and ____________ using a variety of tools and methods.

3. A ______________ layer around Earth.
Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
The Biosphere
A ______________ layer around Earth.
Extends several kilometers ______________ the Earth’s surface.
Extends several kilometers _______________ the ocean’s surface.
The term biosphere includes all organisms and the environments in which they live (___________ and ___________ factors).

4. Biotic Factors Abiotic Factors
Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
Biotic Factors
_______________ factors in an organism’s environment.
Abiotic Factors
________________ factors in an organism’s environment.
Organisms ____________ to survive in the abiotic factors present in their _____________ environment.

5. Levels of Organization
Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
Levels of Organization
Levels _______ in complexity as the _________ and ___________ between organisms increase.
Organism - Individuals
Population - includes all the ____________ in the same species in a
given area.
Community - a collection of __________ that interact with each other
in a given area.
Ecosystem - includes all biotic and abiotic __________in a given area.
Biome – A group of ____________in the same region having similar types
of vegetation governed by similar climate conditions.
Biosphere – all organisms and the ______________ in which they live.

6. Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
The ______________ level of organization is the individual organism itself.
Organisms of a single species that share the same geographic location at the same time make up a ____________.
A _______________ is a group of interacting populations that occupy the same geographic area at the same time.

7. Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
An ___________is a biological community and all of the abiotic factors that affect it.
A __________ is a large group of ecosystems that share the same climate and have similar types of communities.

8. Ecosystem Interactions
Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
Ecosystem Interactions
A ____________ is an area where an organism lives.
A ____________ is the role or position that an organism has in its environment.

9. Community Interactions
Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
Community Interactions
Competition
Occurs when more than one organism uses a resource at the __________ time
____________
Many species get their food by eating other organisms.

10. Symbiotic Relationships
Chapter 2
Principles of Ecology
2.1 Organisms and Their Relationships
Symbiotic Relationships
The close relationship that exists when two or more species live together
_______________
- ________ organisms benefit
_______________
- One benefits while the other is ____________
_______________
- One benefits while the other is ____________

11. Clown Fish & Sea Anemone
Bee & Flowering Plant
Mutualism

12. Bristle Worm
Hermit Crab
Commensalism

13. Wasp Larvae & Tomato Hornworm
Tick & Human
Parasitism