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APES Population Ecology Flashcards

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13791743235populationA group of individuals that belong to the same species and live in the same area0
13791745516population densityrefers to the number of individuals per unit area1
13791749733population dispersionrefers to how individuals of a population are spaced within a region2
13791759745carrying capacity (K)maximum population size that can sustainably be supported by the available resources in the region3
13791769859exponential growthj-shaped curve4
13791772744logistic growths-shaped curve5
13791777101The Rule of 70DT=70/GR6
13791783175r-selected speciesreproduce early in life high capacity for reproductive growth little to no parental care7
13791792358k-selected speciesreproduce later in life produce fewer offspring parental care8
13791804410boom-and-bust cyclecommon among r-strategists; rapid change in population increase leads to an equally rapid drop-off9
13791811605predator-prey cyclePredator max population will NEVER exceed the prey max population This is because of energy 2nd law of Thermodynamics When energy is converted energy is lost as heat As prey increases, predators increase (abundance of food) Prey decreases because of too many predators (more getting hunted) Predators decrease because there is not enough food (prey) Prey increases because of too few predators10
13791840252density-dependent factorslimiting factor that depends on population size ex. increased predation, competition for food or living space, disease, buildup of toxic materials11
13791850703density-independent factorschange the population's size regardless of whether the population is large or small ex. fire, storms, earthquakes, catastrophic events12
13791866068survivorship curvetype 1: K-selected, the majority of offspring will live for a long period of time, eventually they will start to die off type 2: offspring have a 50-50 chance of surviving to old age (straight downward diagonal line) type 3: r-selected, most offspring die young, but if they live to a certain age they will live a longer life13
13791893423what is the most populated country?China14
13791900681actual growth rate(birth rate+immigration)-(death rate+emigration)/100015
13791908795crude birth ratenumber of live births per 1000 members of the population in a year16
13791912442crude death ratenumber of deaths per 1000 members of the population in a year17
13791926399total fertility ratethe number of children a woman will bear during her lifetime18
13791930292replacement birth ratenumber of children a couple must have in order to replace themselves in a population (not always 2, depends on mortality rate- higher mortality rate means a higher replacement birth rate)19
13791946376total fertility rate is affected by these factorsavailability of birth control demand for children in the labor force level of education for women population's culture, beliefs, traditions20
13791965595less deaths are due to in large part:the Industrial Revolution, which improved the standard of living in many developed nations21
13791970370pre-reproductive0-14 years old22
13791972834reproductive15-44 years old23
13792079530demographic transition modelA sequence of demographic changes in which a country moves from high birth and death rates to low birth and death rates through time. 4 states: preindustrial, transitional, industrial, postindustrial24
13792085422preindustrial statepopulation has slow growth, high birth rate, high death rate (harsh living conditions)25
13792090969transitional statehigh birth rates, lower death rates, rapid population growth high birth rates due to cultural or religious traditions and lack of education for women low death rates due to better food, water, and health care26
13792103688industrial stateBirth rates drops (similar to death rate), slowing down population growth27
13792113210postindustrial statefinal state, essentially zero growth28
13792137315genetically modified organisms (GMO)inserting strands of DNA that code for resistance to pests or larger crop size may lead to less genetic diversity, can lead to crops becoming resistant29
13792150871macronutrientscarbohydrates, proteins, and fats needed in large amounts30
13792153358micronutrientsneeded in smaller amounts, vitamins, minerals, iron31
13792165016mass extinctionsduring the last 500 million years there have been 5 major mass extinctions32
13792172192urban sprawlThe process of urban areas expanding outwards, usually in the form of suburbs, and developing over fertile agricultural land.33
13792177653ecological footprintArea of land that is necessary to support all of a person's needs/ wants, and needed to handle all of the waste created Typically measured in hectares (10,000 m^2) US has the largest per capita ecological footprint --Related to affluenza (wealth)34

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