Chapter 18.2Ecosystems and Populations

Energy Flow Within Ecosystems

Chapter 18.2Ecosystems and Populations

Energy Flow Within EcosystemsGEE Science

Summer RemediationMr. Nash

Donnie Bickham Middle SchoolRoom 204

GEE ScienceSummer Remediation

Mr. NashDonnie Bickham Middle School

Room 204

Energy Flow Within EcosystemsEnergy Flow Within Ecosystems Within each of the major ecosystems,

there are many smaller ecosystems. Energy can be added, stored or

transferred. The transfer of energy within an

ecosystem is called energy flow.

Within each of the major ecosystems, there are many smaller ecosystems.

Energy can be added, stored or transferred.

The transfer of energy within an ecosystem is called energy flow.

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Energy FlowEnergy FlowProducers

↓Primary Consumers

↓Secondary Consumers

↓Tertiary Consumers

↓Decomposers

Producers↓

Primary Consumers↓

Secondary Consumers↓

Tertiary Consumers↓

Decomposers

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ProducersProducers Make their own food through the

process of photosynthesis. Examples:

Plants such as grasses Convert energy from the sun into

stored energy to be used later by the plant or primary consumers that eat the plant.

Make their own food through the process of photosynthesis.

Examples: Plants such as grasses

Convert energy from the sun into stored energy to be used later by the plant or primary consumers that eat the plant.

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Primary ConsumersPrimary Consumers Also known as herbivores, or plant

eating only. Examples

Deer

Also known as herbivores, or plant eating only.

Examples Deer

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Secondary ConsumersSecondary Consumers Carnivores, or meat eaters, that eat

the primary consumers.

Carnivores, or meat eaters, that eat the primary consumers.

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Tertiary ConsumersTertiary Consumers Larger carnivores that eat the

secondary consumers. Also includes omnivores, eating both

animal and plant, that eat secondary consumers and producers.

Larger carnivores that eat the secondary consumers.

Also includes omnivores, eating both animal and plant, that eat secondary consumers and producers.

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DecomposersDecomposers When a consumer or producer dies,

the decomposers take over. Decomposers break down organic

material and use the decomposition products as a source of energy.

When a consumer or producer dies, the decomposers take over.

Decomposers break down organic material and use the decomposition products as a source of energy.

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Energy Within EcosystemsEnergy Within Ecosystems Energy flows within an ecosystem in

food chains with energy passing from producer to consumer to decomposer.

The interaction of many food chains forms food webs.

As energy is transferred from one organism to another, some of the energy is lost through heat and activity.

Energy flows within an ecosystem in food chains with energy passing from producer to consumer to decomposer.

The interaction of many food chains forms food webs.

As energy is transferred from one organism to another, some of the energy is lost through heat and activity.

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Energy PyramidEnergy Pyramid An energy pyramid is used to show

how energy transfers and decreases as organisms go up the food chain.

A trophic level is the position occupied by an organism in a food chain. Figure 18.5 on pg. 316

An energy pyramid is used to show how energy transfers and decreases as organisms go up the food chain.

A trophic level is the position occupied by an organism in a food chain. Figure 18.5 on pg. 316

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