1. Environmental Science: Toward A Sustainable Future Chapter 3
Ecosystems: How They Work

2. Fig 2-13

3. Periodic Chart of Elements John Wiley — Resource Manager CD-ROM
N-CHOPS

4. Know definitions for the following:
Atom
Element
Energy
First law of thermodynamics
Matter
Molecule
Second law of thermodynamics

5. Light energy chemical energy
Energy changes in organisms and ecosystems (Fig 3-12)
Light energy chemical energy
Many calories of light energy to produce a few calories of carbohydrate

6. Primary production
GPP= NPP + energy used by the plants

7. Productivity of different ecosystems
Fig 3-14

8. Practice Quiz (easy for warm up)
Autotrophs are the type of car that emits the most CO2 into the atmosphere. T F
“Neolithic Revolution” refers to:
a) the rise of agriculture b) the rise of industrialization
c) the discovery of the lithosphere d) a rock band
Detritivores and decomposers consume:
a) living organic material b) inorganic material c) dead organic material d) mushrooms
Gross primary production is:
a) the total of all prim prod b) energy used by plants for respiration c) biomass consumed only by top level carnivores d) heating of the Earth caused by certain atmospheric gases

9. Basic Principles of Ecosystem Sustainability
For sustainability, ecosystems use sunlight as their source of energy.
For sustainability, ecosystems dispose of wastes and replenish nutrients by recycling all elements.

10. Continuous input
Recycling

12. The Carbon Cycle
How and in what form does carbon enter and leave the cycle?
How is the role of autotrophs and heterotrophs different and the same?
What are the human impacts on the cycle?

14. The Phosphorus Cycle
How and in what form(s) does phosphorus enter and leave the cycle?
How is the role of autotrophs and heterotrophs different and the same?
What are the human impacts on the cycle?

16. The Nitrogen Cycle
How and in what form(s) does nitrogen enter and leave the cycle?
How is the role of autotrophs and heterotrophs different and the same?
What are the human impacts on the cycle?

17. Nitrogen fixation: Bacteria in root nodules of legumes
An example of mutualism
Fig 3-19

18. A bloom of Cyanobacteria

19. Cyanobacteria
Anabaena
Microcystis

21. Hydrologic cycle
Fig 9-3

22. The Human System

23. Nutrient cycling and energy flow through an ecosystem
Fig 3-20