Energy flow through an ecosystem
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Energy Flow Through an Ecosystem. Food Chains, Food Webs, Energy Pyramids. Begins with the SUN Photosynthesis. 6CO 2 + 6H 2 O + sunlight & chlorophyll  C6H 12 O 6 + 6O 2. The chemical reaction by which green plants use water and carbon dioxide and light from the sun to make glucose.

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Energy Flow Through an Ecosystem

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Energy flow through an ecosystem

Energy Flow Through an Ecosystem

Food Chains, Food Webs, Energy Pyramids


Energy flow through an ecosystem

  • Begins with the SUN

  • Photosynthesis

6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2


Energy flow through an ecosystem

  • The chemical reaction by which green plants use water and carbon dioxide and light from the sun to make glucose.

  • ENERGY is stored in glucose; glucose is stored as starch.


Organisms that can make glucose during photosynthesis are called autotrophs producers

Organisms that can make glucose during photosynthesis are called AUTOTROPHS(PRODUCERS)


An organism is

An organism is …..

  • Any independent living thing

  • Can be as small as a single celled bacteria

  • Or as large as a whale!


Producers are

Producers Are-

  • Producers get their food and energy from the sun. (PLANTS)

  • They are AUTOTROPHS

  • They make their food through a process called photosynthesis.


Producers use most of the energy they make for themselves

Producers use most of the energy they make for themselves.


Producers use cellular respiration to supply the energy they need to live

Producers use cellular respiration to supply the energy they need to live.


Cellular respiration is the chemical reaction that releases the energy in glucose

6O2 + C6H12O6 -->  6H2O + 6CO2 + energy

CELLULAR RESPIRATION is the chemical reaction that releases the energy in glucose.


Energy flow through an ecosystem

The energy that is not used by producers can be passed on to organisms that cannot make their own energy.


Organisms that cannot make their own energy are called consumers they are heterotrophs

Organisms that cannot make their own energy are called CONSUMERS. They are HETEROTROPHS


Consumers

Consumers

  • Consumers need to eat their food to get energy. (ANIMALS)


Types of consumers are

Types of consumers are

  • There are THREE types of Consumers

    • Herbivores

    • Carnivores

    • Omnivores.

  • Its still all about what you eat!


Herbivores eat only plants

Herbivores eat only plants.


Carnivores only eat meat other animals

Carnivores only eat meat (other animals)


Omnivores eat both meat animals and plants

Omnivores eat both meat (animals) and plants.


Energy flow through an ecosystem

Stop…Review…Check…Turn to your partner and tell them the meaning of each word. Also give two examples of each.

  • Carnivore:

  • Herbivore:

  • Omnivore:


Consumers that eat producers to get energy

Consumers that eat producers to get energy:

  • Are first order or primary consumers

  • Are herbivores (plant-eaters)


Most of the energy the primary consumer gets from the producer is used by the consumer

Most of the energy the primary consumer gets from the producer is used by the consumer.


Some of the energy moves into the atmosphere as heat

Some of the energy moves into the atmosphere as heat.


Energy flow through an ecosystem

Some energy in the primary consumer is not lost to the atmosphere or used by the consumer itself.This energy is available for another consumer.


A consumer that eats another consumer for energy

A consumer that eats another consumer for energy:

  • Is called a secondary or second order consumer

  • May be a carnivore or a herbivore

  • May be a predator

  • May be a scavenger


Energy flow through an ecosystem

Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer.


Some of the energy is lost as heat but some energy is stored and can passed on to another consumer

Some of the energy is lost as heat, but some energy is stored and can passed on to another consumer.


A consumer that eats a consumer that already ate a consumer

A consumer that eats a consumer that already ate a consumer:

  • Is called a third order or tertiary consumer

  • May be a carnivore or a herbivore

  • May be a omnivore

  • May be a predator

  • May be a scavenger


Energy flow through an ecosystem

Consumers that hunt & kill other consumers are called predators.The animals that are hunted & killed are called prey.


Consumers that eat producers other consumers

Consumers that eat producers & other consumers

  • Are called omnivores

  • Omnivores eat plants and animals


Consumers that eat other consumers that have already died are called scavengers

Consumers that eat other consumers that have already died are called scavengers.


Decomposers

Decomposers

  • Decomposers eat dead things and turn them back into dirt, or soil. YUK!

  • Examples:

    • Mushrooms

    • Worms

    • Bugs


What would the world look like without decomposers bacteria and fungi

What would the world look like without decomposers (bacteria and fungi?


Energy flow through an ecosystem

The transfer of energy from sun to producer to primary consumer to secondary consumer to tertiary consumer can be shown in a FOOD CHAIN.


How they relate

How they relate

.


Energy flow through an ecosystem

Stop…Review…Check…Turn to your partner and tell them the meaning of each word. Also give two example of each.

  • Producers:

  • Consumers:

  • Decomposers:


Energy flow through an ecosystem

Bear

Shark

Rabbit

Cherry tree

Mushroom

Human

Tulip (flower)

8. Panther

9. Giraffe

10. Worm

On a sheet of note book paper describe the following animals as either a producer, consumer or decomposer. For the consumers, make sure to include if they are a carnivore, herbivore or omnivore. Please use complete sentences! (Ex: A _____ is a ______.)


Answer key

Consumer / Omnivore

Consumer / Carnivore

Consumer / Herbivore

Producer

Decomposer

Consumer / Omnivore

Producer

Consumer / Carnivore

Consumer / Herbivore

Decomposer

Answer Key


Another way of showing the transfer of energy in an ecosystem is the energy pyramid

Another way of showing the transfer of energy in an ecosystem is theENERGY PYRAMID.


Energy pyramids show

Energy pyramids show

  • That the amount of available energy decreases down the food chain

  • It takes a large number of producers to support a small number of primary consumers

  • It takes a large number of primary consumers to support a small number of secondary consumers


Food webs

Food Webs:

  • Are interconnected food chains

  • They show the feeding relationships in an ecosystem

  • EXAMPLE


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