AP BIO: Ecology Review
Study online at https://quizlet.com/_72o8p
1. Population a group of organisms of the same species populating a given area
2. Community (ecology) a group of interdependent organisms inhabiting the same region
and interacting with each other
3. ecosystem a system formed by the interaction of a community of organisms with their
physical environment
4. biosphere the regions of the surface and atmosphere of the Earth (or other planet) where
living organisms exist
5. habitat the type of environment in which an organism or group normally lives or
occurs
6. niche (ecology) the status of an organism within its environment and community
(affecting its survival as a species)
7. size the property resulting from being one of a series of graduated measurements
(as of clothing)
8. population density number of individuals per unit area
9. dispersion The pattern of distribution of organisms in a population
10. age structure proportion of people in different age groups in a population
11. survivorship curves They show the likelihood of survival at different ages throughout the lifetime
of the organism.
12. type I Survivorship curve in which the likelihood of dying is small until late in life,
when mortality increases rapidly (such as Humans or elephants).
13. type II Survivorship curve in which there is an equal likelihood of dying throughout
life (such as birds or small mammals).
1/9
, AP BIO: Ecology Review
Study online at https://quizlet.com/_72o8p
14. type III Survivorship curve in which organisms are most likely to die when young; the
few survivors tend to live until old age (such as oysters, salmon, or insects).
15. biotic potential the maximum reproductive rate of an organism, given unlimited resources and
ideal environmental conditions
16. carrying capacity largest number of individuals of a population that a environment can support
17. limiting factors Conditions in the environment that put limits on where an organism can live
18. density-dependent limiting factors (such as competition, predation, parasitism, and disease) that
factors are affected by the number of individuals in a given area
19. density-indepen- limiting factor that affects all populations in similar ways, regardless of popu-
dent factors lation size
20. reproductive rate R= (births-deaths)/N [N- population size at beginning of interval]
21. growth rate the amount by which a population's size changes in a given time
22. intrinsic rate the mean rate of growth of a population calculated by birth minus death rates
when the population is free of competition with other species and from other
factors that affect growth.
23. exponential growth growth pattern in which the individuals in a population reproduce at a constant
rate
24. logistic growth growth pattern in which a population's growth rate slows or stops following a
period of exponential growth
25. sigmoid curve a period of exponential growth; population approaches its environmental
limits, growth slows and finally stabilizes, fluctuating around the carrying
capacity of the environment
26. population cycles
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Study online at https://quizlet.com/_72o8p
1. Population a group of organisms of the same species populating a given area
2. Community (ecology) a group of interdependent organisms inhabiting the same region
and interacting with each other
3. ecosystem a system formed by the interaction of a community of organisms with their
physical environment
4. biosphere the regions of the surface and atmosphere of the Earth (or other planet) where
living organisms exist
5. habitat the type of environment in which an organism or group normally lives or
occurs
6. niche (ecology) the status of an organism within its environment and community
(affecting its survival as a species)
7. size the property resulting from being one of a series of graduated measurements
(as of clothing)
8. population density number of individuals per unit area
9. dispersion The pattern of distribution of organisms in a population
10. age structure proportion of people in different age groups in a population
11. survivorship curves They show the likelihood of survival at different ages throughout the lifetime
of the organism.
12. type I Survivorship curve in which the likelihood of dying is small until late in life,
when mortality increases rapidly (such as Humans or elephants).
13. type II Survivorship curve in which there is an equal likelihood of dying throughout
life (such as birds or small mammals).
1/9
, AP BIO: Ecology Review
Study online at https://quizlet.com/_72o8p
14. type III Survivorship curve in which organisms are most likely to die when young; the
few survivors tend to live until old age (such as oysters, salmon, or insects).
15. biotic potential the maximum reproductive rate of an organism, given unlimited resources and
ideal environmental conditions
16. carrying capacity largest number of individuals of a population that a environment can support
17. limiting factors Conditions in the environment that put limits on where an organism can live
18. density-dependent limiting factors (such as competition, predation, parasitism, and disease) that
factors are affected by the number of individuals in a given area
19. density-indepen- limiting factor that affects all populations in similar ways, regardless of popu-
dent factors lation size
20. reproductive rate R= (births-deaths)/N [N- population size at beginning of interval]
21. growth rate the amount by which a population's size changes in a given time
22. intrinsic rate the mean rate of growth of a population calculated by birth minus death rates
when the population is free of competition with other species and from other
factors that affect growth.
23. exponential growth growth pattern in which the individuals in a population reproduce at a constant
rate
24. logistic growth growth pattern in which a population's growth rate slows or stops following a
period of exponential growth
25. sigmoid curve a period of exponential growth; population approaches its environmental
limits, growth slows and finally stabilizes, fluctuating around the carrying
capacity of the environment
26. population cycles
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