Page 46 - Science Course 3 (Book 1)

Ecosystems: Interactions of Living Organisms Mo2-L1a: How Population
Changes Affect an Ecosystem?
Lesson 1

Carrying Capacity

the largest number of individuals of one species that
In this topic, you will learn the following an ecosystem can support over time.
lessons:
Number of Individuals
Mo.2–L1a: How Population Changes Affect an Carrying
Ecosystem? Capacity
Mo.2–L1b: How Do Living Organisms Interact?

How Population Changes Affect an
Mo2-L1a Ecosystem?
Time
KEY CONCEPTS:
1. How can you describe an ecosystem?
2. How do population changes affect ecosystems? Let’s Begin

Vocabulary A-Z Abiotic and Biotic Factors

Let us learn some vocabulary Ecosystems contain all the nonliving and living parts
of the environment in a given area.

Habitat The nonliving parts—called abiotic factors—include
the place within an ecosystem where an organism sunlight, water, soil, and air.
lives; provides the biotic and abiotic factors an The living or once-living parts of an ecosystem—
organism needs to survive and reproduce.
called biotic factors—include living organisms and
the decayed remains of dead organisms.

Population
all the organisms of
the same species
that live in the
same area at the
same time.

Community
all the populations
living in an ecosystem
at the same time.

38