Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Name Date j Principles of Ecology Food Chains and Webs—PowerPoint Guide Student Objective: Describe food chains and webs The flow of energy “Three hundred trout are needed to support one man for a year. The trout, in turn, must consume 90,000 frogs, that must consume 27 million grasshoppers that live off of 1,000 tons of grass.” —G. Tyler Miller, Jr., American Chemist (1971) Ecosystems Definition reviewed: o Depends on: o interact to form stable system + Energy input from Nutrient inputs o “Biogeochemical” cycles Recycles chemicals o o o Life on earth depends on these cycles & photosynthesis Producers The of ecosystems o Convert energy to o Construct compounds from Photosynthesis a very fundamental process!! : o Chlorophyll: Producer = autotroph = Consumers Organisms that eat other living plants, animals or microbes Get energy from Primary consumers organic molecules 1 energy raw materials Secondary Tertiary Detrivores Organisms that eat detritus Detritus Get energy from Live on detritus in such a way that it decays o organic molecules Subgroup of detrivores Examples: Food chains & webs Food chain o o relationships relationships Food web A food chain—Draw an example of a food chain. A food web—Draw an example of a food web. What can happen with a disruption in a food web? 2