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7.5B Energy Flow

7.5B Energy Flow Through Living Systems

TermDefinition
Food Chain An energy path from one organism to another showing a linked series; feeds on the one next to it in the series.
Food Web Overlapping food chains with different pathways for the flow of food energy in an ecosystem.
Omnivore Kind of animal that eats both animals and plants; some will hunt and eat their food, others are scavengers and will eat dead matter.
Detrital Food Web Starts with chemical energy stored in organic debris or waste from other food webs; energy flows from debris directly to decomposers that break down organic matter, which becomes food & energy for larger consumers, & then to decomposers.
Producers Organisms that transform energy from the Sun and use carbon dioxide and water to make food.
Consumers Organisms that feed on other organisms in a food chain.
Herbivores Animals that only eat plants or plant products.
Carnivores Animals that eat other animals.
Primary Consumers Organisms that get their energy by feeding on producers in the food chain.
Secondary Consumers Organisms that get their energy by feeding on primary consumers (herbivores) in the food chain.
Tertiary Consumers Organisms that get their energy by eating secondary consumers.
Decomposers Organisms such as bacteria and fungi that break down the remains of dead plants and animals, without need for internal digestion.
Trophic Level Any class of organisms occupying the same position in a food chain, such as primary consumers or secondary consumers.
Energy Pyramid Shows how much energy transfers to the next trophic level in a food chain.
Ecosystem A system consisting of all of the interactions that occur between the abiotic and biotic factors within an environment.