| Term | Definition |
|---|
| 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 |
| denitrification | conversion of nitrates into nitrogen gas |
| evaporation | process by which water changes from a liquid into an atmospheric gas |
| algal bloom | an immediate increase in the ammount of algae and other producers that results from a large input of a limiting nutrient |
| limiting nurtient | single nurtient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem |
| nutrient | chemical substance that an organism requires to live |
| nitrogen fixation | process of converting nitrogen gas into ammonia |
| primary productivity | rate at which organic matter is created by producers in an ecosystem |
| transpiration | loss of water from a plant through its leaves |
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