How do organisms obtain energy
Autotroph: An autotroph is an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
Heterotroph: A heterotroph is an organism deriving its nutritional requirements from complex organic substances.
Decomposer: A decomposer is an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
Heterotroph: A heterotroph is an organism deriving its nutritional requirements from complex organic substances.
Decomposer: A decomposer is an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
One tundra food chain starts with grasses then goes to the musk ox, to the artic wolf, to the polar bear, then finally to the decomposers.
One desert food chain starts with desert plants (like cacti), then goes to the kangaroo rat, to the snake, to a desert fox, then finally to the decomposers.
One desert food chain starts with desert plants (like cacti), then goes to the kangaroo rat, to the snake, to a desert fox, then finally to the decomposers.
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.
Pyramid of numbers: In the pyramid of numbers as you travel up the pyramid the number of organisms lessens
Biomass pyramid: In the biomass pyramid as you travel up the pyramid the biomass of each organism decreases
Energy pyramid: In the energy pyramid as you travel upwards the energy each organism receives less and less energy
Biomass pyramid: In the biomass pyramid as you travel up the pyramid the biomass of each organism decreases
Energy pyramid: In the energy pyramid as you travel upwards the energy each organism receives less and less energy