organism that is able to capture energy from sunlight or chemicals and use it to produce its own food

first producer of energy rich compounds that are later used by other organisms

process used by plants to produce food from sunlight

process in which chemical energy is used to produce carbohydrates

organism that obtains food by consuming other living things

organism that relies on other organisms for its energy and food supply

obtains energy by eating other animals

obtains energy by eating plants

consumes carcasses of other animals

breaks down and obtains energy from dead organic matter

organism that feeds on plant and animal remains and other dead matter

a series of organisms interrelated in their feeding habits

photosynthetic algae found near the surface of the ocean

series of organisms related by predator-prey and consumer-resource interactions

small free-floating animals that form part of plankton

each step in a food chain or food web

illustration of the relative amounts of energy or matter contained within each trophic level in a given food chain or food web

amount of living matter in a given habitat

process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another

nourishing, providing nutrition

process of converting nitrogen gas into nitrogen compounds that plants can absorb and use

process by which bacteria convert nitrates into nitrogen gas

single essential nutrient that limits productivity in an ecosystem

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Chapter 3 Vocabulary

Term	Definition
autotroph	organism that is able to capture energy from sunlight or chemicals and use it to produce its own food
primary producer	first producer of energy rich compounds that are later used by other organisms
photosynthesis	process used by plants to produce food from sunlight
chemosynthesis	process in which chemical energy is used to produce carbohydrates
heterotroph	organism that obtains food by consuming other living things
consumer	organism that relies on other organisms for its energy and food supply
carnivore	obtains energy by eating other animals
herbivore	obtains energy by eating plants
scavenger	consumes carcasses of other animals
omnivore	eats both plants and animals
decomposer	breaks down and obtains energy from dead organic matter
detritivore	organism that feeds on plant and animal remains and other dead matter
food chain	a series of organisms interrelated in their feeding habits
phytoplankton	photosynthetic algae found near the surface of the ocean
food web	series of organisms related by predator-prey and consumer-resource interactions
zooplankton	small free-floating animals that form part of plankton
trophic level	each step in a food chain or food web
ecological pyramid	illustration of the relative amounts of energy or matter contained within each trophic level in a given food chain or food web
biomass	amount of living matter in a given habitat
biogeochemical cycle	process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
nutrient	nourishing, providing nutrition
nitrogen fixation	process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
denitrification	process by which bacteria convert nitrates into nitrogen gas
limiting nutrient	single essential nutrient that limits productivity in an ecosystem

Created by: little_timmy

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