3.15 K- and r- selected Species
This is the type of survivorship curve that shows survival throughout the lifespan until individuals die in old age
What is a Type 1 survivorship curve?
These are types of factors that influences a population's probability of survival in a manner that depends on the size of the population, such as food and space.
What are density-dependent factors?
This is the name of the economist that proposed the notion that the human population could exceed Earth's carrying capacity.
Who is Thomas Malthus?
This is the number of years it takes a population to double.
What is doubling time?
What equation allows you to calculate doubling time?
70/ growth rate (in percent form) = doubling time in years
This is the type of selected species that a mouse is.
What is an r-selected species?
This is the maximum number of species that a given area can suport.
What is carrying capacity?
This is an estimate of the average number of children each woman in a population will bear.
What is the TFR (Total Fertility Rate)?
This is a theory that states that a country moves from high to lower birth and death rates as development occurs and that country moves from a preindustrial to an industrialized economic system.
What is the theory of demographic transition?
In 2018, the global crude birth rate was 23 and the global crude death rate was 9. What was the global population growth rate?
1.4 %
This is the type of species that can occupy a broad ecological niche.
What is a generalist?
This type of growth is NOT limited by resources, and resembles a J-shaped curve.
What is exponential growth?
This is the shape of the age structure diagram that is typical of a developing nation.
What is a pyramid?
This is the type of population growth that occurs in stage 2 of the demographic transition.
What is rapid population growth?
Using the rule of 70, a population growing at 10 percent would double in ______ years.
7 years
This is the type of survivorship curve that has low survivorship (high death rate) early on.
What is a type III survivorship curve?
This type of growth model starts out exponential, but slows as it reached the carrying capacity. It resembles an S-shaped curve.
What is logistic growth?
This type of country is typified by a low replacement-level fertility.
What is a developed country?
This is the stage of the demographic transition where population growth may decline.
What is stage 4?
Cuba has a population of roughly 12 million people. It has a CBR of 8 and a CDR of 6. Ignoring migration, how many years will it take Cuba’s population to double?
350 years
This level of population growth is only reached under ideal conditions, such as unlimited space and water.
What is biotic potential?
This will usually happen to a population when a resource base decreased.
What is decrease?
This is the definition of crude birth rate.
What is the number of births per 1,000 individuals per year?
This is an equation that was developed to estimate the impact of human lifestyles on Earth.
What is the IPAT equation? (Impact = Population x Affluence x Technology)
In Vietnam, there were 16 births and 6 deaths out of every 100 people in the year 2011. Using the rule of 70, estimate the doubling time for Vietnam's population.