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Ap Environmental Science Population Flashcards

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14823134051Three types of population distributionRandom, Uniform, Clumped0
14823134052Density Dependent FactorA factor that influences an individuals probability of survival and reproduction in a manner that depends on the size of the population (i.e. predation, disease, food supply)1
14823134053Density Independent FactorA factor that has the same effect on a individual's probability of survival and reproduction at any populations size2
14823134054exponential growth modelsoccurs when populations are not limited by resources. (J-curve)3
14823134055logistical growth modeloccurs when populations reach a carrying capacity established by a limiting resource and initially experience large growth but then level off4
14823134056Type I, II, III Curvesreproductive strategies of different species. Type I fosters their young, Type II does sorta kinda, and type III straight up ditches their kids5
14823134057K selective speciesA species with a low intrinsic growth rate that causes the population to increase slowly until it reaches carrying capacity (TYPE I). Produce only a few offspring and provide parental care.6
14823134058r selective speciesA species with a high intrinsic growth rate that causes the population to overshoot and quickly die off (TYPE III). Produce many small offspring and provide no parental care.7
14823134059Population sizeThe total number of individuals within a defined area at a given time8
14823134060Population densityThe number of individuals per unit area at a given time9
14823134061Population distributionHow individuals are distributed with respect to one another10
14823134062Population age structurehow many individuals fit into age categories. Shown by age structure diagrams11
14823134063Growth RateThe number of offspring an individual can produce in a given period of time, minus the deaths of the individual or offspring during the same period12
14823134064MetapopulationsA group of spatially distinct populations that are connected by occasional movements of individuals between the populations13
14823134065CompetitionThe struggle of individuals to obtain a limiting resource14
14823134066Resource partitioningWhere species work together and divide up a resource like birds in a tree-this can reduce competition15
14823134067PredationThe use of one species as a resource by another species16
14823134068ParasitesType of predation when species live on or in the organism they consume17
14823134069ParasitoidsType of predation when species lay eggs inside other organisms18
14823134070MutualismA type of interspecific interaction where both species benefit19
14823134071CommensalismA type of relationship in which one species benefits but the other is neither helped nor hurt20
14823134072Keystone SpeciesKeystone or Busch? Jk nah this is a species that plays a role in its community that is far more important that ints relative abundance might suggest21
14823134073Primary SuccessionOccurs on surfaces that are initially devoid of soil. Starts with moss and lichens on the exposed rock and it it progresses to shrubs and plants and eventually restores ecosystem.22
14823134074Secondary SuccessionOccurs in areas that have been disturbed but have not lost their soil23
14823134075Community EcologyThe study of the interactions between species in a habitat24
14823134076Competitive exclusion principletwo species competing for the same limited resource cannot coexist. This explains why resource partitioning takes place so that both can survive25
14823134077Interspecific CompetitionWhen two species compete over one limited resource26
14823134078Intraspecific CompetitionWhen two individuals within the same species compete over one limited resource27
14823134079Factors that determine species richnessLatitude (distance from equator), Time (older the habitat, the higher SR), Habitat size (larger=greater)28
14823134081How does the human population not have a food deficit?Innovation and Technology29
14823134082growth rate equationCBR-CDR/1030
14823134083doubling time for a population equation70/growth rate31
14823134084DemographyThe study of human populations and population trends32
14823134085Total Fertility Rate (TFR)estimate of the average number of children each woman will bear in her lifetime33
14823134086Replacement level fertility (RLF)2.134
14823134087Developed CountriesCountries with high levels of industrialization and income35
14823134088Developing CountriesCountries with relatively low levels of industrialization and income36
14823134089Life ExpectancyThe average number of years that an infant born in a particular year in a particular country can be expected to live, given the current average life span and death rate of that country37
14823134090Infant Mortality RateNumber of deaths of children under the age of one per 1000 births38
14823134091Child Mortality RateNumber of deaths of children under the age of five per 1000 births39
14823134092Demographic TransitionThe theory that as a country moves from a subsistence economy to and industrialized one, it undergoes a predictable shift in population growth40
14823134093Family PlanningRegulating the number or spacing of children through the use of birth control41
14823134094IPAT equationenvironmental impact = Population x Affluence x Technology42

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