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Populations Vocab
Vocabulary Flash Cards
| Term | Definition |
|---|---|
| Population | a group of organisms of the same species that live in a specific geographical area and interbreed |
| Population Density | the number of individuals of the same species that live in a given unit of area |
| Dispersion | the pattern of distribution of organisms in a population |
| Growth Rate | an expression of the increase in the size of an organism or population over a given period of time |
| Reproductive Potential | the maximum number of offspring that a given organism can produce |
| Exponential Growth | logarithmic growth, or growth in which numbers increase by a certain factor in each successive time period |
| Niche | the unique position occupied by a species, both in terms of its physical use of its habitat and its function within an ecological community |
| Competition | the relationship between two species (or individuals) in which both species (or individuals) attempt to use the same limited resource such that both are negatively affected by the relationship |
| Predation | an interaction between two species in which one species, the predator, feeds on the other species, the prey |
| Parasitism | a relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed |
| Mutualism | a relationship between two species in which both species benefit |
| Commensalism | a relationship between two organisms in which one organism benefits and the other is unaffected |
| Symbiosis | a relationship in which two different organisms live in close association with each other |
| Demography | the study of the characteristics of populations, especially human populations |
| Age Structure | the classification of members of a population into groups according to age or the distribution of members of a population in terms of age groups |
| Survivorship | the percentage of newborn individuals in a population that can be expected to survive to a given age |
| Fertility Rate | the number of births (usually per year) per 1,000 women of childbearing age (usually 15 to 44) |
| Migration | in general, any movement of individuals or populations from one location to another; specifically, a periodic group movement that is characteristic of a given population or species |
| Life Expectancy | the average length of time that an individual is expected to live |
| Demographic Transistion | the general pattern of demographic change from high birth and death rates to low birth and death rates, as observed in the history of more-developed countries |
| Infrastructure | the basic facilities of a country or region, such as roads, bridges, and sewers |
| Arable Land | farmland that can be used to grow crops |
| Urbanization | an increase in the ratio or density of people living in urban areas rather than in rural areas |
| Least Developed Countries (LDC's) | countries that have been identified by the United Nations as showing the fewest signs of development in terms of income, human resources, and economic diversification |
| Biodiversity | the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem |
| Gene Flow | the movement of genes into or out of a population due to interbreeding |
| Keystone Species | a species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community |
| Ecotourism | a form of tourism that supports the conservation and sustainable development of ecologically unique areas |
| Endangered Species | a species that has been identified to be in danger of extinction throughout all or a significant part of its range and that is thus under protection by regulations or conservation measures |
| Threatened Species | a species that has been identified to be likely to become endangered in the foreseeable future |
| Exotic Species | a species that is not native to a particular region |
| Poaching | the illegal harvesting of fish, game, or other species |
| Endemic Species | a species that is native to a particular place and that is found only there |
Created by:
schristensen
Popular Ecology sets