Produce their own food from solar energy by photosynthesis; transform solar energy into chemical energy; primary producer
Ecologists classify organisms
By how they obtain their energy
Consume other organisms (consumers); Get energy from primary producers; carnivores, herbivores
Break down the dead; mostly fungi and bacteria
Eat detritis: partially decomposed matter in water or soil
A pattern of feeding relationships consisting of different levels
Sequence of food transfer up the trophic levels
Support all other trophic levels; autotrophs; plants on land, cyanobacteria in water
Heterotrophs: Primary, secondary, tertiary, quaternary
Detritivores and decomposers derive energy from dead materials and wastes
Collection of all food chains in an ecosystem
Components of ecosystems
Energy flow: passage of energy through the ecosystem
Chemical cycling: Transfer of materials within the ecosystem
Energy flow and nutrient cycling
Nutrients cycle, but energy flows through a system
Composed of all the organisms that feed at a particular link in the food chain. 10% of energy is transferred from one trophic level to another. At each step, some usable energy is lost as heat.
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.