the maximum number of individuals an ecosystem can support
What is carrying capacity
100
population size, population density, population spacing, age structure
What is 4 characteristics that define a population
100
Birth and immigration are contributing factors
What is population growth
100
habitat expansion and technology are 2 key factors for humans living on the Earth
What is increasing Earth's carrying capacity
100
the addition of harmful substances to the environment
What is pollution
200
a measure of the number of individuals in a certain space at a particular time
What is population density
200
growth, stability, decline
What is 3 stages of population change
200
death and emigration are contributing factors
What is population decline
200
As population increases, expansion of habitats increases, resulting in
What is loss of land space
200
fish populations may never recover
What is overfishing
300
the study of why populations of organisms change and what causes them to change
What is population dynamics
300
all populations are able to grow rapidly
populations tend to remain constant in size
there are limits to natural resources
within a given population there is genetic variation
What is Darwin's observations of population growth
300
pine cones from pine trees release huge amounts of pollen into the air which can spread across an area quickly
What is opportunist reproductive strategy
300
available resources, lack of predators, and survival of offspring are 3 conditions which allow
What is rapid growth of human populations
300
land development destroying habitats, the use of resources, and killing of populations (such as salmon and lobster for food) are all examples
What is the effects of human population growth
400
a factor that prevents the continuing growth of a population in an ecosystem
What is limiting factor
400
rapid growth and gradual growth
What is 2 patterns of population growth
400
natural factors such as famine or fires can cause a population to decline
What is limiting factors
400
transporting water (irrigation) and purifying water through water treatment plants are 2 examples
What technology
400
changes in weather, or factors such as drought, hurricanes, tornadoes, fires, or floods are all examples
What is density-independent factors
500
the movement of individuals out of a population
What is emigration
500
postreproductive
reproductive
prereproductive
What is age structure of a population
500
factors may include competition, disease, parasitism, and predation
What is density-dependent factors
500
introduction of new (invasive) species, pollution, and overfishing are examples
What is how human population growth affects the environment
500
scientists consider all the following factors: population size, age structure, ages of individuals having children, average number of offspring produced by an individual, life expectancy, and health when making