Characteristics of Populations
group of organisms of the same species that live in the same area
population
study of information about human populations
demography
resources that can regenerate or be replaced
renewable resources
the total of all variety of organisms in an area
biodiversity
number of individuals per unit area
population density
birthrate - deathrate =
population growth rate
using natural resources without depleting them or harming the environment
sustainable use
when a species disappears from all or part of its range
extinction
occurs when individuals reproduce at a constant rate
exponential growth
number of people at each different age level
age structure
aquaculture
raising of fish and other water animals for human consumption--sustainable use of fish
damage to habitats caused by air, water, or land pollution
habitat degradation
the number of organisms of one species that can be supported in an environment
carrying capacity
hunting and gathering, agriculture, industrial growth, and urban development are examples
human activities that affect the biosphere
ways we can sustainably use trees
tree farms, forest management (not cutting down all the trees at once and planting new trees)
biodiversity includes these 3 types of diversity
ecosystem diversity
species diverstiy
genetic diversity
examples are predation, parasitism, predation, and competition
density-dependent limiting factors
when large amounts of the population is children the population is experiencing ________ growth
rapid
fossil fuels, coal, oil, and natural gas are examples of this
nonrenewable resources
why is biodiversity important
it brings stability to an ecosystem because species depend on one another for survival