Matter enters an ecosystem at any level and leaves at any level. Matter cycles freely between trophic levels and between the ecosystem and the physical environment.

moves through the community of an ecosystem in a single direction by means of a food chain (web) in which there are the eaters, the eaten, and a combination of both.

The position of a species or a group of species within a food chain or food web.

simplified model that shows a single path for energy flow through an ecosystem.

model that shows many interconnected food chains and path ways in which energy and matter flow through an ecosystem.

is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass is the amount of living or organic matter present in an organism.

ecosystems which include oceans, salt marsh and intertidal ecology, estuaries and lagoons, mangroves and coral reefs, the deep sea and the sea floor.

biological community and all the nonliving factors that affect it.

a nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings or between two parts of the same system.

Living or growing on land or on or in the ground; not aquatic, arboreal, or epiphytic

is an organism, either a green plant or bacterium, which is part of the first level of a food chain.

An organism, often a bacterium or fungus, that feeds on and breaks down dead plant or animal matter, thus making organic nutrients available to the ecosystem.

is an animal that eats both plants and animals for their main food

wild animals that hunt, or prey on, other animals.

is a graphical model of energy flow in a community. The different levels represent different groups of organisms that might compose a food chain.

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Bio Standard B.12(C)

analyze the flow of matter and energy through trophic levels using various...

Term	Definition
Flow of matter	Matter enters an ecosystem at any level and leaves at any level. Matter cycles freely between trophic levels and between the ecosystem and the physical environment.
Flow of energy	moves through the community of an ecosystem in a single direction by means of a food chain (web) in which there are the eaters, the eaten, and a combination of both.
Trophic levels	The position of a species or a group of species within a food chain or food web.
Food chains	simplified model that shows a single path for energy flow through an ecosystem.
Food webs	model that shows many interconnected food chains and path ways in which energy and matter flow through an ecosystem.
Ecological pyramids	is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass is the amount of living or organic matter present in an organism.
Marine ecosystem	ecosystems which include oceans, salt marsh and intertidal ecology, estuaries and lagoons, mangroves and coral reefs, the deep sea and the sea floor.
Ecosystem	biological community and all the nonliving factors that affect it.
Heat	a nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings or between two parts of the same system.
Terrestrial	Living or growing on land or on or in the ground; not aquatic, arboreal, or epiphytic
Producer	is an organism, either a green plant or bacterium, which is part of the first level of a food chain.
Decomposer	An organism, often a bacterium or fungus, that feeds on and breaks down dead plant or animal matter, thus making organic nutrients available to the ecosystem.
Omnivore	is an animal that eats both plants and animals for their main food
Predator	wild animals that hunt, or prey on, other animals.
Energy pyramid	is a graphical model of energy flow in a community. The different levels represent different groups of organisms that might compose a food chain.

Created by: sstall

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