Transfer of Energy

Calories

What is a calorie? The amount of heat required to raise The amount of heat required to raise

the temperature of 1 gram of water by the temperature of 1 gram of water by 1 degree Celsius1 degree Celsius

Another similar measurement is a joule (J)1 calorie = 4.18J

1000J = 1kJ

Energy Use

An organism uses different amounts of energy for different actions

Different organisms use different amounts of energy

Transfer of Energy

Where do animals get their energy?

What is the original source of all energy on Earth?

Transfer of Energy

Transfer of energy from one trophic level to the next is not efficient

Textbook, page 8, last paragraph

Fig. 1.5B

Where Does it Go??

Fig. 1.5A

Worksheet

What About Organisms That do NOT get Eaten??

What happens to the energy left in their bodies when they die?

Detritivores and Decomposers

The bodies of smaller dead animals, dead plant matter and animal dung ( solid waste) are food for Detritivores.

Decomposers

Detritivores include decomposers such as bacteria and fungi that break down the cells and extract the last remaining energy

http://soils.usda.gov/sqi/concepts/soil_biology/images/PBUT_LR.JPG

Detritivores, Decomposers and Scavengers

Are included in nearly every food web.

Including the food web that includes human beings!