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APES Population Dynamics and Ecology Flashcards

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5581846759Population SizeThe number of individual organisms present in a population at a given time.0
5581846760Population DensityThe number of individuals in a population per unit of area.1
5581846761Population DistributionHow organisms are arranged within an area; sometimes called population dispersion.2
5581846764ImmigrationThe movement of individuals in to a given area.3
5581846765EmigrationThe movement of individuals away from a given area.4
5581846766MigrationThe seasonal movement of organisms into and out of an area.5
5581846767Exponential GrowthThe pattern of population growth in which a population increases by a fixed percentage each year.6
5581846768Limiting FactorsA characteristic of the environment that restricts population growth.7
5581846769Carrying CapacityThe largest population a given environment can support.8
5581846770Logistic GrowthThe pattern of population growth in which exponential growth is slowed and finally stopped by limiting factors.9
5581846771Density-dependent factorsA limiting factor whose influence changes with population density; includes competition, predation, and disease10
5581846772Density-independent factorsA limiting factor whose influence is NOT affected by population density; includes catastrophic events (e.i. hurricanes, ice storms...)11
5581846773Birth RateTotal number of births per population in a given time period12
5581846774Death RateTotal number of deaths per population in a given time period13
5581846779sustainable developmenta way of using natural resources without depleting them14
5581846780biodiversitythe total genetic based variety of organisms15
5581846781extinctionwhen a species disappears from all or part of its range16
5581846782endangered speciesa species whose population numbers are declining; in danger or extinction17
5581846783habitat fragmentationwhen development splits an ecosystem into smaller pieces18
5581846785invasive speciesintroduced species into a new habitat that thrive due to lack of competition or predators19
5581851982intraspecific competitionmembers of the same species compete for limited resources20
5581852917Interspecific competitionmembers of different species compete for limited resources21
5581859710K selected speciesThose organisms living longer lives and having fewer babies22
5581866935r selected speciesThose organisms living shorter lives and having many smaller babies23
5581868748Type 1 survivorship curveHigh survivorship over time24
5581870246Type 2 survivorship curveA constant proportion of individuals dying over time25
5581873457Type 3 survivorship curveHigh mortality at early an early age26
8171165410Population dynamicsThe study of how and why populations change in their distribution, numbers, age structure and density in response to environmental conditions27
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