DSHS ch 14 vocabulary
Terms in this set (29)
Describes where both biotic and abiotic factors in the area live.
A composed of all of the physical, chemical, and biological factors that a species needs to survive, stay healthy, and reproduce.
States that two species are competing for the same resources.
Species that occupy similar niches but live in different geographical regions.
When two organisms fight for the same limited resources.
What are the two different types of competitions?
Interspecific competition- when two different species fight for the same limited resource.
Intraspecific competition- when two of the same species fight over the same resource.
The process by one organism captures and feeds upon another organism.
A close ecological relationship between two or more organisms of different species that live in direct contact with one another.
An interspecies interaction in which both organisms benefit from one another.
A relationship between two organisms in which one receives an ecological benefit from another, while the other neither benefits nor is harmed.
A relationship similar to predation in that one organisms benefits while the other is harmed.
The way in which individuals of a population are spread in an area or a volume.
What are the 3 different types of dispersion?
1) Clumped dispersion
2) Uniform dispersion
3) Random dispersion
Individuals may live close together in groups in order to facilitate mating, gain protection, or access food resources.
Territoriality and intraspecies competition for limited resources lead to individuals living at specific distances from one another.
Individuals are spread randomly within an area or a volume.
A generalized diagram showing the number of surviving members over time from a measured set of births.
The movement of individuals into a population from another population.
The movement of individuals out of a population and into another population.
Occurs when a population size increases dramatically over a period of time. ( J-shaped)
A population begins with a period of slow growth followed by brief period of exponential growth before leveling off at a stable size ( S-shaped)
An environment that is the maximum number of individuals of a particular species that the environment can normally and consistently support.
A dramatic decline in the size of a population over a short period of time.
Density-Independent limiting factors
the aspects of the environment that limit a populations growth regardless of the density of the population.
Density-dependent limiting factors
Limiting factors that are affected by the number of individuals in a given area.
The sequence of biotic changes that regenerate a damaged community or create a community in a previously uninhabited area.
The establishment and development of an ecosystem in an area that was previously uninhabited.
The first organisms that live Ina previously uninhabited area.
The re-establishment of a damaged ecosystem in an area where the soil was left intact.
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