Chapter 5

How ecosystems work

Section1: Energy Flow in Ecosystems

Use sunlight in photosynthesis

Plants, algae, and some bacteria capture solar energy

Make carbohydrates (energy + H2O + CO2)

Used by organism and transferred when eaten

Used to move, grow, digest, and reproduce *

Life Depends on the Sun

Section1: Energy Flow in Ecosystems

Producer makes own food = autotrophic

Consumer gathers energy from other organisms = heterotrophic *

Producers to Consumers

Section1: Energy Flow in Ecosystems

In a Hydrothermal Vent (opening under ocean floor)

No sunlight; no photosynthesis; bottom of ocean

Bacteria make food from hydrogen sulfides escaping from mantle

Ecosystem built from these autotrophs *

Exception to the Rule

Section1: Energy Flow in Ecosystems

Class Chart *What Eats What?

Section1: Energy Flow in Ecosystems

Opposite of photosynthesis

Breaking down food using Oxygen

Excess energy is stored *

Cellular Respiration

Section1: Energy Flow in Ecosystems

Marsh Mallow Lab

Why is a pyramid used?

What do primary, secondary, and tertiary mean?

Why does only 10% transfer?

*

Energy Transfers