Biology - Ch. 3

This is caused by excess fertilizer entering water ecosystems

• trophic level

• autotroph

• algal bloom

• nitrogen fixation

An organism that makes its own food

• autotroph

• heterotroph

• photosynthesis

• carnivore

A cycle that shows the movement of matter between organisms and the biosphere

• water cycle

• nitrogen cycle

• carbon cycle

• biogeochemical cycle

Process by which organisms use chemical energy to make carbs

• denitrification

• limiting nutrient

• chemosythesis

process by which soil bacteria convert nitrates into nitrogen gas

• nitrogen fixation

• denitrification

• autotroph

a diagram that shows the amount of energy or matter at each trophic level in a food chain

• carbon cycle

• water cycle

• ecological pyramid

• food web

an organism that obtains its energy from other organisms (eating)

• heterotroph

• autotroph

a nutrient that is in short supply within an ecosystem

• nitrogen

• ecological pyramid

• primary productivity

• limiting nutrient

makes up 78% of the earth's atmosphere

• oxygen

• carbon

• nitrogen

• hydrogen

process by which bacteria convert nitrogen gas into ammonia

• nitrogen cycle

• denitrification

• nutrients

• nitrogen fixation