Autotroph- an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide
Heterotorph- an organism getting its nutritional requirements from complex organic substances
Decomposer - Organism that eats and then decomposes decayed matter.
food chains- Tundra -
Savanna -
taiga -
Tropical Rainforest -
Desert -
How Does Energy Flow Through an Ecosystem ?
"Food chains and food webs deal with both matter and energy. When ecologists want to focus only on energy, they use another type of model--an ecological pyramid."