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Ap Environmental Science - Population Flashcards

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9517333413Three types of population distributionRandom, Uniform, Clumped0
9517333414Density 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
9517333415Density Independent FactorA factor that has the same effect on a individual's probability of survival and reproduction at any populations size2
9517333416exponential growth modelsoccurs when populations are not limited by resources. (J-curve)3
9517333417logistical growth modeloccurs when populations reach a carrying capacity established by a limiting resource and initially experience large growth but then level off. However, they do not exist exactly at carrying capacity. They fluctuate above and below.4
9517333418Type 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
9517333419K selective strategiesA species with a low intrinsic growth rate that causes the population to increase slowly until it reaches carrying capacity (TYPE I)6
9517333420R selective strategiesA species with a high intrinsic growth rate that causes the population to overshoot and quickly die off (TYPE III)7
9517333421Population sizeThe total number of individuals within a defined area at a given time8
9517333422Population densityThe number of individuals per unit area at a given time9
9517333423Population distributionHow individuals are distributed with respect to one another10
9517333424Population age structurehow many individuals fit into age categories. Shown by age structure diagrams11
9517333425Growth 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
9517333426MetapopulationsA group of spatially distinct populations that are connected by occasional movements of individuals between the populations13
9517333427CompetitionThe struggle of individuals to obtain a limiting resource14
9517333428Resource partitioningWhere species work together and divide up a resource like birds in a tree-this can reduce competition15
9517333429PredationThe use of one species as a resource by another species16
9517333430ParasitesType of predation when species live on or in the organism they consume17
9517333431ParasitoidsType of predation when species lay eggs inside other organisms18
9517333432MutualismA type of interspecific interaction where both species benefit19
9517333433CommensalismA type of relationship in which one species benefits but the other is neither helped nor hurt20
9517333434Keystone 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
9517333435Primary 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
9517333436Secondary SuccessionOccurs in areas that have been disturbed but have not lost their soil23
9517333437Community EcologyThe study of the interactions between species in a habitat24
9517333438Competitive exclusion principletwo species competing for the same limited resource cannot coexist. This explains why resource partitioning takes place so that both can survive25
9517333439Interspecific CompetitionWhen two species compete over one limited resource26
9517333440Intraspecific CompetitionWhen two individuals within the same species compete over one limited resource27
9517333441Factors that determine species richnessLatitude (distance from equator), Time (older the habitat, the higher SR), Habitat size (larger=greater)28
9517333442Theory of Island BiogeographyExplains that both habitat size and distance determine species richness29
9517333443How does the human population not have a food deficit?Innovation and Technology30
9517333444growth rate equationCBR-CDR/1031
9517333445doubling time for a population equation70/growth rate32
9517333446DemographyThe study of human populations and population trends33
9517333447Total Fertility Rate (TFR)estimate of the average number of children each woman will bear in her lifetime34
9517333448Replacement level fertility (RLF)2.135
9517333449Developed CountriesCountries with high levels of industrialization and income36
9517333450Developing CountriesCountries with relatively low levels of industrialization and income37
9517333451Life 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 country38
9517333452Infant Mortality RateNumber of deaths of children under the age of one per 1000 births39
9517333453Child Mortality RateNumber of deaths of children under the age of five per 1000 births40
9517333454Demographic TransitionThe theory that as a country moves from a subsistence economy to and industrialized one, it undergoes a predictable shift in population growth41
9517333455Family PlanningRegulating the number or spacing of children through the use of birth control42
9517333456IPAT equationenvironmental Impact=Population, Affluence, Technology43

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