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Ecosystems 8.L.3.1

Understand how organisms interact with and respond to the biotic and abiotic com

TermDefinition
abiotic A non-living part of an ecosystem that shapes its environment
biotic Pertaining to living organisms of an ecosystem.
community A group of interacting species living in the same ecosystem. (For example placing populations of different species together).
ecosystem A community of living organisms interacting with each other and their non-living environment.
habitat The natural home or environment of an animal, plant or other organism.
limiting factors Anything that constrains a population's size and slows or stops it from growing. (Ex. food, a mate, competition with other organisms)
niche The role an organism plays in a community. Environment and weather play an important part in this.
population A distinct group of individuals or organisms.
population density Simply; how many organisms are in a particular area divided by that area.
density-dependent factors They can have a positive or negative affect to the size of the population and include disease, competition, and predation. If the relationship is positive the limiting factors will increase with the size of the population and the growth will be limited.
density-independent factors This is also called limiting factors, is any force that affects the size of the population of living things regardless of the density of the population. (how many individuals per area)
abiotic factors Temperature, light, water, salt, sand, soil, sunlight.
biotic factors Animals, plants, trees, grass, moss, flowers, insects, mold, bacteria.
species A group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner. (Ex. humans, black bears, boxers)
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