1 of 11

Ecology is the study of

  • the relationships among living organisms, & the relationships of organisms with their environments

2.1 Organisms and Their Relationships

Chapter 2

Principles of Ecology

1

2 of 11

The Biosphere

  • A thin layer around Earth

Principles of Ecology

2.1 Organisms and Their Relationships

Chapter 2

2

3 of 11

The Biosphere

Principles of Ecology

2.1 Organisms and Their Relationships

Chapter 2

4 of 11

Biotic Factors

Principles of Ecology

  • Living factors

Abiotic Factors

  • Nonliving factors
  • Organisms adapt to survive in their environment.

2.1 Organisms and Their Relationships

Chapter 2

4

5 of 11

Levels of Organization

Principles of Ecology

  • organism
  • population

community

  • ecosystem
  • biome
  • biosphere

2.1 Organisms and Their Relationships

Chapter 2

5

6 of 11

Principles of Ecology

  • Organisms of one species in the same place at the same time are a population.
  • A biological community is a group of interacting populations in the same place at the same time.

2.1 Organisms and Their Relationships

Chapter 2

6

7 of 11

  • Ecosystem: a community and the abiotic factors that affect it.

Principles of Ecology

Biome: a group of ecosystems in the same climate with similar types of communities.

2.1 Organisms and Their Relationships

Chapter 2

7

8 of 11

Ecosystem Interactions

Principles of Ecology

  • Habitat: where an organism lives.
  • Niche: the role that an organism has in its environment.

2.1 Organisms and Their Relationships

Chapter 2

8

9 of 11

Types of community Interactions:

Principles of Ecology

  • Competition
  • Predation

2.1 Organisms and Their Relationships

Chapter 2

9

10 of 11

Symbiotic Relationships:

Principles of Ecology

  • two or more species live together
  • Mutualism
  • Commensalism
  • Parasitism

2.1 Organisms and Their Relationships

Chapter 2

10

11 of 11