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Ap Environmental Science Population Flashcards

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8161485624Three types of population distributionRandom, Uniform, Clumped0
8161485625Density 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
8161485626Density Independent FactorA factor that has the same effect on a individual's probability of survival and reproduction at any populations size2
8161485627exponential growth modelsoccurs when populations are not limited by resources. (J-curve)3
8161485628logistical 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
8161485629Type 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
8161485630K selective strategiesA species with a low intrinsic growth rate that causes the population to increase slowly until it reaches carrying capacity (TYPE I)6
8161485631R selective strategiesA species with a high intrinsic growth rate that causes the population to overshoot and quickly die off (TYPE III)7
8161485632Population sizeThe total number of individuals within a defined area at a given time8
8161485633Population densityThe number of individuals per unit area at a given time9
8161485634Population distributionHow individuals are distributed with respect to one another10
8161485635Population age structurehow many individuals fit into age categories. Shown by age structure diagrams11
8161485636Growth 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
8161485637MetapopulationsA group of spatially distinct populations that are connected by occasional movements of individuals between the populations13
8161485638CompetitionThe struggle of individuals to obtain a limiting resource14
8161485639Resource partitioningWhere species work together and divide up a resource like birds in a tree-this can reduce competition15
8161485640PredationThe use of one species as a resource by another species16
8161485641ParasitesType of predation when species live on or in the organism they consume17
8161485642ParasitoidsType of predation when species lay eggs inside other organisms18
8161485643MutualismA type of interspecific interaction where both species benefit19
8161485644CommensalismA type of relationship in which one species benefits but the other is neither helped nor hurt20
8161485645Keystone 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
8161485646Primary 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
8161485647Secondary SuccessionOccurs in areas that have been disturbed but have not lost their soil23
8161485648Community EcologyThe study of the interactions between species in a habitat24
8161485649Competitive exclusion principletwo species competing for the same limited resource cannot coexist. This explains why resource partitioning takes place so that both can survive25
8161485650Interspecific CompetitionWhen two species compete over one limited resource26
8161485651Intraspecific CompetitionWhen two individuals within the same species compete over one limited resource27
8161485652Factors that determine species richnessLatitude (distance from equator), Time (older the habitat, the higher SR), Habitat size (larger=greater)28
8161485653Theory of Island BiogeographyExplains that both habitat size and distance determine species richness29
8161485654How does the human population not have a food deficit?Innovation and Technology30
8161485655growth rate equationCBR-CDR/1031
8161485656doubling time for a population equation70/growth rate32
8161485657DemographyThe study of human populations and population trends33
8161485658Total Fertility Rate (TFR)estimate of the average number of children each woman will bear in her lifetime34
8161485659Replacement level fertility (RLF)2.135
8161485660Developed CountriesCountries with high levels of industrialization and income36
8161485661Developing CountriesCountries with relatively low levels of industrialization and income37
8161485662Life 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
8161485663Infant Mortality RateNumber of deaths of children under the age of one per 1000 births39
8161485664Child Mortality RateNumber of deaths of children under the age of five per 1000 births40
8161485665Demographic TransitionThe theory that as a country moves from a subsistence economy to and industrialized one, it undergoes a predictable shift in population growth41
8161485666Family PlanningRegulating the number or spacing of children through the use of birth control42
8161485667IPAT equationenvironmental Impact=Population, Affluence, Technology43

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