The Ecological Footprint

1. The Ecological Footprint By: Lisa Ketchledge Mark Wilson Mike Catoggio Figure from http://www.ire.ubc.ca/ecoresearch/ecoftpr.html

2. An ecological footprint is the amount of land that it takes to support one individual… • The components of the footprint include cropland used for food, grazing land, forest land used for wood for housing and other consumer goods, a measure of the amount of land it takes to provide energy (This includes consideration of the effect of CO2 emissions.), sea area used for fishing and land used for building and transportation. Of these, the largest component in North America is? http://hum.amu.edu.pl/~zbzw/glob/glob29.htm Energy

3. At each level… 90% • At each level of a food chain, about _____ of the energy is lost in the form of heat. Thus, the total energy passed from one level to the next is only about _____. 10% http://www.dole5aday.com/encyclopedia/CARROTS/CARROTS.html 1000lbs carrots -->100lbs rabbits-->10lbs fox

4. Organisms that can take energy from inorganic sources and fix it into energy rich organic molecules are called? AUTOTROPHS

5. Primary consumers in ecosystems are… Primary Consumers Herbivores Animals that eat just plants silly!

6. Trophic Levels • Normally ecosystems have about _______ trophic levels. 4-5

7. About ___________ of the Earth's land surface is now used to cultivated crops or for human settlement. Another _______ is used for the purpose of feeding livestock. Cultivating Crops 10%-15% 6-8% http://hum.amu.edu.pl/~zbzw/glob/glob29.htm

8. Anaerobic breakdown Anaerobic breakdown of organic food sources in cells is called? RESPIRATION O2

9. The energy content of 1 gram of dry plant matter is about… Energy Content http://www.botanical.com/ 4.3 kCal

10. Carbon • 98% of the free carbon on earth is found in the ocean http://www.oceanfutures.org/