25 terms

Ecosystems

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biology
The scientific study of living organisms and their interactions with their environment
abiotic
Non-living factors that influence an ecosystem
biotic
Living factors that influence an ecosystem
community
A group of various species that live in the same habitat and interact with each other
predator
One that does the killing
population
A group of organisms of the same species that live in the same geographical area
ecosystem
A community of organisms and their abiotic environment
species
A group of organisms that are closely related and can mate to produce fertile offspring
biomass
Total mass of organisms in an area
producer
Uses light or chemical energy to make food
consumer
Organisms that rely on other organisms for their energy and food supply
food chain
Series of steps in which organisms transfer energy by eating and being eaten
food web
Network of food chains within an ecosystem
energy pyramid
Shows the relative amount of energy available at each trophic level
biodiversity
Variety of life in a given area
prey
The one that is the food
symbiosis
A close ecological relationship between the individuals of two or more species
competition
When two organisms of the same or different species attempt to use an ecological resource in the same place at the same time
limiting factor
A factor that limits the growth or development of an organism, population, or process
decomposers
Breaks down dead organic matter
trophic level
Level an organism occupies in a food chain
carbon cycle
Biogeochemical cycle by which carbon is exchanged among the biosphere, geosphere, hydrosphere, and atmosphere of the Earth
nitrogen cycle
The process by which nitrogen is converted between its various chemical forms
oxygen cycle
Biogeochemical cycle that describes the movement of oxygen within the atmosphere, the biosphere, and the geosphere
phosphorus cycle
Biogeochemical cycle that describes the movement of phosphorus through the geosphere, hydrosphere, and biosphere