An association between two organisms in which one benefits and the other neither benefits or is harmed.
the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one organism by another.
A property of matter by which it continues in its existing state of rest or uniform motion in a straight line unless acted upon by a greater force.
competition between species that depend on the same kinds of limited resources.
A symbiotic relationship in which both species benefit from the relationship.
Species that not natural to the area, brought there by force or through migration.
A form of relationship between two organisms where one benefits and the other is harmed.
Firm or obstinate continuance in a course of action in spite of difficulty or opposition.
A kind of interaction in which one organism captures and feeds on another organism.
The development of living communities in a previously uninhabited and barren habitat with little or no soil.
The ability to recover.
The differentiation of niches that enables similar species to coexist in a community.
The series of changes that occur after a disturbance of an existing ecosystem.
Species that exibit a high-growth rate due to lack of competition in their niches.
Species that display traits associated with being near carrying capacity, invest more heavily in fewer offspring, each of which has a relatively high probability of surviving to adulthood.
intrinsic rate of growth
The maximum capacity of members of a population to reproduce.
All the limiting factors that tend to reduce population growth rates and set the maximum allowable population size or carrying capacity of an ecosystem.
The largest number of individuals of a population that a environment can support.
Growth rates regulated by internal and external factors that establish an equilibrium with environmental resources.
The process by which two species evolve in response to changes in each other.
A factor that causes the growth of a population to decrease.
range of tolerance
The range of chemical and physical conditions that must be maintained for populations of a particular species to stay alive and grow, develop, and function normally.
A group of individuals of the same species that live in the same area.