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key terms on population and interaction

Symbiosis a close, long-term relationship between 2 or more species
Parasitism one species lives on or within a host organism and receives nourishment from the host, whereas the host is harmed by the interaction.
Mutualism interactions that are beneficial to the growth, survival, and/or reproduction of both interacting species.
commensalism One species receives benefits from the association and the other species is unaffected
Predator-prey It always results in the death of the prey and the absorption of the prey’s tissue through consumption.
ecosystem a system of interactions and inter-relationships between the living and non-living components in an environment
organism A single individual, such as one tree, one crow, or one bacteria
species Closely related organisms that can breed and produce fertile offspring
population A group of individuals of the same species living in a specific area
community A group of populations that interact in a given environment These populations depend on one another for food, shelter, or other survival needs
diversity The measure of the number of different species in an ecosystem.
abiotic factors the nonliving parts of an ecosystem
biotic factors the living parts of an ecosystem
carrying capacity the maximum number of individuals (organism) that an area of land can support, usually determined by their food requirement
J-shaped graph this graph shows a population experiencing an ideal growth pattern. There are no limiting factor and it describes growth of a species new to an ecosystem with no predators.
boom-bust graph this graph shows an exponential growth of a species to a certain point which causes the population to decrease dramatically.
s-curve graph a graph that shows a population that experiences exponential growth followed by a plateau due to limiting factors. When the graph plateau, it has reached its carrying capacity.
linear graph a graph that shows constant growth or decline because birth rate equals death rate
limiting factor an environmental factor that limits or slows the growth or activities of an organism
competition the struggle between individuals of the same or different species for food, space, light, etc, when these are inadequate to supply the needs of all
Birth rate The ratio of total live births to total population in a specified community or area over a specified period of tim
Death rate The ratio of total deaths to total population in a specified community or area over a specified period of tim
Created by: nprincilus