series of steps in which organisms transfer energy by eating or being eaten.

network of complex interactions formed by feeding relationships among the various organisms in an ecosystem

small free floating animals that form part of plankton

each step in a food chain or food web

an illustration of the reduction in energy as you move through each feeding (trophic) level in an ecosystem.

is fuel that is developed from organic materials, a renewable and sustainable source of energy used to create electricity or other forms of power.

a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.

anything that nourishes a living being.

some bacteria can convert N2 into ammonia by the process termed nitrogen fixation; these bacteria are either free-living or form symbiotic associations with plants or other organisms

a microbially facilitated process of nitrate reduction (performed by a large group of heterotrophic facultative anaerobic bacteria) that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products

the plant's growth is often directly related to the amount of whichever limiting nutrient (nitrogen or phosphorus) that it is are able to get. Generally speaking, phosphorus is a limiting nutrient in freshwater systems and nitrogen is a limiting nutrient

any organism capable of self-nourishment by using inorganic materials as a source of nutrients

any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.

the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates

the synthesis of organic compounds within an organism, with chemical reactions providing the energy source.

an organism requiring organic compounds for its principal source of food.

a person or thing that consumes.

an animal or other organism that feeds on dead organic matter.

an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances.

an organism that uses organic waste as a food source, as certain insects.

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chapter 3

Question	Answer
food chain	series of steps in which organisms transfer energy by eating or being eaten.
phytoplankton	mixture of floating algae
food web	network of complex interactions formed by feeding relationships among the various organisms in an ecosystem
zooplankton	small free floating animals that form part of plankton
trophic level	each step in a food chain or food web
ecological pyramid	an illustration of the reduction in energy as you move through each feeding (trophic) level in an ecosystem.
biomass	is fuel that is developed from organic materials, a renewable and sustainable source of energy used to create electricity or other forms of power.
biogeochemical cycle	a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.
nutrient	anything that nourishes a living being.
nitrogen fixation	some bacteria can convert N2 into ammonia by the process termed nitrogen fixation; these bacteria are either free-living or form symbiotic associations with plants or other organisms
denitrification	a microbially facilitated process of nitrate reduction (performed by a large group of heterotrophic facultative anaerobic bacteria) that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products
limting nutrient	the plant's growth is often directly related to the amount of whichever limiting nutrient (nitrogen or phosphorus) that it is are able to get. Generally speaking, phosphorus is a limiting nutrient in freshwater systems and nitrogen is a limiting nutrient
autotroph	any organism capable of self-nourishment by using inorganic materials as a source of nutrients
primary producer	any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.
photosynthesis	the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates
chemosynthisis	the synthesis of organic compounds within an organism, with chemical reactions providing the energy source.
heterotroph	an organism requiring organic compounds for its principal source of food.
consumer	a person or thing that consumes.
carnivor	an animal that eats flesh.
herbivore	plant eating animal
scavenger	an animal or other organism that feeds on dead organic matter.
omniver	eats a variety of foods
decomposer	an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances.
detrivore	an organism that uses organic waste as a food source, as certain insects.

Created by: troylauppe1

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