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Populations Vocab

Vocabulary Flash Cards

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




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