8.11A Lesson

Interdependence

of

Living Systems

8.11A Interdependence/competition

7.5B Energy Flow

All living things within an ecosystem

Biotic Factor

​All non-living things within an ecosystem

Abiotic Factor

​Ecosystem: a group of living things interacting with each other and their environment

Multiple Choice

Plants, animals, bacteria, and parasites

• Abiotic Factors

• Biotic Factors

Multiple Choice

Air Pressure, sunlight, water, nutrients in the soil, gases in the air, temperature

• Biotic Factor

• Abiotic Factor

Understanding the Biosphere:

Multiple Choice

Different species share an ecosystem to form a ________,

• Community

• Population

Interdependence:

In an ecosystem, many living things interact with each other, in fact they NEED each other to survive.

​Think-Pair-Share

In what way do you think living things depend on each other?

​Population Limiting Factors

• All living things NEED resources

  -Food

  -Water

  -Shelter/Space

• Carrying Capacity- # of organisms an environment can hold due to these limiting factors.

• Natural Hazards will add to limiting factors.

Competition:

Living organisms compete or fight for resources.

• Compete for nutrients, sunlight, water

• Root space

Producers

Consumers

• Compete for space/shelter

• Compete for nutrients (food/water)

• Compete for mates

Multiple Choice

Immediately after a forest fire, the primary consumers in the area will compete most for which biotic factor?

• Food

• Oxygen

• Space

• Sunlight