Ecosystems
Ecosystem~ all the living and nonliving things that interact in an area
Niche~ an organism’s particular role in an ecosystem, or how it makes its living
Limiting factors~ an environmental factor that prevents a population from
increasing
Species~ a group of organisms that are similar and capable of reproducing
Ecology~ the study of how living things interact with each other and their
environment
Biome~ a group of ecosystems with similar climates and organisms
Primary level~ the first level of the food web
Secondary level~ the second level of food web, receives only 10% of energy form
the primary level
Tertiary~ the final level of food web, receives only 10% of energy from previous
level
Biotic Factors~ a living part of an ecosystem
Abiotic Factors~ a nonliving part of an ecosystem
Organism~ an individual living thing
Population~ a group of organisms of the same species living in the same area
Community~ all the different populations that live in a given ecosystem
Ecological Pyramid~ model of how energy and matter flow through an
ecosystem
Population Density~ measures the number of individual organisms living in a
given space