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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


Process by which water changes from a liquid into an atmospheric gas


loss of water from a plant through its leaves


Chemical substance that an organism requires to live

Nitrogen Fixation

Process of converting nitrogen gas into ammonia


conversion of nitrates into nitrogen gas

Primary Productivity

rate at which organic matter is created by producers in an ecosystem

Limiting Nutrient

Single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem

Algal Bloom

an immediate increase in the amount of algae and other producers that results from a large input of a limiting nutrient


a stream-like path that water runs in that leads to a body of water like an ocean or lake.

Seepage (infiltration)

when water sinks down into the soil


the scientific study of interactions among organisms and between organisms and their environment, or surroundings.


contains the combined portions of the planet in which all of life exists, including land, water, and air, or atmosphere


a group of organisms so similar to one anoter that they can breed and produce fertile offspring


groups of individuals that belong to the smae species and live in the same area


assemblages of different populations that live together in a defined area


a collection of all the organisms that live in a particular place, together with their nonliving, or physical environment


a group of ecosystems that have the same climate and similar dominant communities


organism that can caputure energy from sunlight or chemicals and use it 2 produce its own food from inorganic compounds; also called ______

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