#22 Food Chains, Webs, and Trophic Levels Warm-up Write one observation, one inference, and one
way you think this relates to food chains/webs *Food chain A food chain is the simplest path that energy takes through an ecosystem. Energy enters an ecosystem from the Sun The position of an organism within a food chain is
called a trophic level. Arrows shows a transfer of energy amongst organisms. It also shows what organisms eat followed by what organisms consumes it. *Food chain Trophic levels use some of the energy in the process of cellular respiration C6H12O6 + 6 O2 6 CO2 + 6 H2O + heat energy
Each level loses 90% of its energy due to heat and stores the remaining 10%. *1 Trophic level st The first trophic level consists of producers (green plants) also known as autotrophs. Producers capture the Suns energy during
photosynthesis, and converts it to form simple sugars. *1 Trophic level st Autotrophs (producers) use some of the sugars for energy and converts others to organic compounds (carbohydrates, proteins, and fats) that is needed for
the structure and functions of the organism. Examples of producers include plants and phytoplankton. *2 Trophic level The second trophic level consists of primary consumers
nd Primary consumers eat producers. Organisms that only eat plants are called herbivores. The herbivore uses some of the organic compounds for energy (10%) and much of the consumed energy is lost as heat (90%). Examples of primary consumers include grasshoppers, rabbits and zooplankton.
*3 rd and 4 th
Trophic levels The third trophic level, or any higher trophic level, consists of consumers. 3rd level are called secondary consumers and 4th level are called tertiary consumers. The consumer at the end of the food chain is also called the top carnivore
*3rd and 4th Trophic levels Consumers that eat other consumers are called carnivores; consumers that eat both producers and consumers are called omnivores. The carnivores or omnivores use some of the organic compounds for energy (10%) and much of the consumed energy is lost as heat (90%). Examples of consumers include humans, wolves, frogs, and minnows.
*More on Trophic levels Heterotrophs are organisms that cannot use the sun to make its own food. Heterotrophs are organisms that have to eat other organisms for energy. Which trophic level(s) are heterotrophs? heterotrophs that breaks down organic material and returns the nutrients to soil, water, and air making the nutrients available to other organisms are called a
decomposer. Examples: fungi, mushrooms, earthworms, bacteria Examples of food chains and trophic levels *Food web
A food web represents several interconnected food chains. It also shows the various paths that energy takes throughout an ecosystem. Brainpop anyone? https://www.brainpop.com/science/ecologyandbehavior/foodchains/ https://www.youtube.com/watch?v=CReZd9OHEfs
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