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25 Cards in this Set
- Front
- Back
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biosphere
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the parts of earth and the surrounding atmosphere where there is life
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Community
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is all the populations of different species that live together in the same area at the same time
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Population
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is all the organisms of the same species that live in the same area at the same time.
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Competition
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is the demand for resources, such as food, water, and shelter, in short of supply in a community
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Limiting factor
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Anything that restricts the size of a population
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Population density
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is the size of population compared to the amount of space available
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Biotic potential
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is the potential growth of a population if it could grow in perfect conditions with no limiting factors
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Carrying capacity
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the largest number of individuals of one species that an environment can support
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Birthrate
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the number of offspring produced over a given time period
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death rate
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the number of individuals that die over a given period of time
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extinct species
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a species that has died out and no individuals are left
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endangered species
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a species whose population is at risk of extinction
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threatened species
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a species at risk, but not yet endangered
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migration
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the instinctive seasonal movement of a population of organisms from one place to another
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habitat
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the place within an ecosystem where an organism lives
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niche
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what a species does in its habitat to survive
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producer
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organisms that get energy from the environment, such as sunlight, and make their own food
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consumer
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organisms that get energy by eating other organisms
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symbiosis
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a close, long term relationship between two species that usually involves an exchange of food or energy
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mutualism
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a symbiotic relationship in which both partners benefit
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commensalism
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a symbiotic relationship that benefits one species but does not harm or benefit the other
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parasitism
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a symbiotic relationship that benefits one species and harms the other
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Give examples of possible limiting factors.
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available water, food, shelter, sunlight, temperature, disease, predators, natural disasters
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What is one method used by scientists to count and monitor animal populations?
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capture-mark-and-release
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What is one method of estimating population density? Explain.
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sample count, count only the species in a representative area, like 1 square km, then multiplying the sample by the total square kms.
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