Populations

a non-living thing, such as water, temperature, and minerals, that affects an ecosystem

the distribution of individuals in a species, categorized by both age and sex

a living thing that influences an ecosystem, such as prey, predators, and pathogens

the maximum number of individuals of a population that a habitat can support

the life statistics of a population, such as births and deaths

limitations to population growth that vary with population density, such as food availability and disease

limitations to population growth that are not dependent on population density, such as weather and environmental catastrophes

the way in which individuals are arranged within the boundaries of a population

the rate of population growth in situations in which food and other resources are unlimited

the speed at which an individual of a species can produce offspring

an organism from one ecosystem that is brought to live in a different ecosystem

an organism that does not occur naturally in an ecosystem but thrives and often damages its new ecosystem

the timing and characteristics of a significant event in the life cycle of a species

an environmental factor that restricts the growth of populations

a mathematical means of showing how the rate of increase in a population decreases as the population size increases

a model that indicates how a population grows more slowly when a population reaches the carrying capacity of its environment

the rate of death in a population

a species that is normally is found in a particular ecosystem

an interbreeding group of individuals of the same species

the number of individuals of a population per unit of area

the study of populations and how they interact with the environment

a graphical representation of the numbers or proportions of individuals surviving at each age