Flashcards
Population
Flashcards do conjunto (24)
- 1limiting resourceca resource the population cannot live without but occurs in lower quantities than the population needs (it limits the resource)
- 2overshootwhen the population becomes larger than the environment's carrying capacity
- 3die-offrapid decline in population due to death
- 4population growth ratethe number of offspring an individual can produce in a given time period, minus the deaths of the individual or its offspring during the same period
- 5intrinsic growth rate (r)max potential for growth of a population under (1) ideal conditions and (2) with unlimited resources
- 6exponential vs. logistic growth modelexponential: estimates pop's future size after a period of time, based on intrinsic growth rate and # of reproducing individuals in pop
logistic: describes pop w/ growth that's initially exponential, but slows as it approaches carrying capacity - 7J-shaped curve vs. S-shaped curveJ: curve of exponential growth model
S: shape of logistic growth model - 8r-selected species-short life span
-short time to maturity
-many and small offspring
-variable population
ex: oysters - 9k-selected species-long life span
-"good" parents
-reproduce less times
-large offspring
-stable population
ex: apes - 10type I survivorship curvehigh survival throughout most of life, but die in high numbers at old age
ex: elephants (k-selected species) - 11type II survivorship curverelatively constant decline in survivorship throughout life
ex: squirrels
- 12type III survivorship curvelow survivorship early in life, not many reach adulthood
ex: mosquitos (r-selected species)
- 13metapopulationspatially distinct populations that are connected by occasional movements of individuals between them
- 14corridorstrips of natural habitat that connect populations
- 15predationinteraction where one animal typically kills and consumes another anmal
- 16parasitisminteraction in which one organism lives on/in another organism
parasitoid: lays eggs inside a host
pathogen: causes disease in host - 17mutualisminteraction between 2 species that increases the chances of survival or reproduction for both species
- 18commensalismrelationship where one species benefits an the other species is neither harmed nor helped (neutral)
- 19competitive exclusion principleprinciple stating that 2 species competing for the same limiting resource cannot coexist
- 20immigration vs. emigrationimmigrate: people move into a country/region
emigrate: people move out of a country/region - 21crude birth rate (CBR)number of births per 1000 people per year
- 22crude death rate (CDR)number of deaths per 1000 people per year
- 23equations for: -global population growth rate -doubling time -national population growth rateglobal pop: (CBR - CDR) / 10
doubling time: 70 / growth rate
national pop: [(CBR + imm) - (CDR + em)] / 10 - 24—
Informações
- Descrição
- Advanced placement Environmental Science (Flashcards) FlashCards sobre Population, criado por Ashley Hay em 11-04-2016.
- Criado por
- Ashley Hay · abr 2016
- Atualizado
- 29 set 2016
- Visualizações
- 41
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