Characteristics of Populations
number of organisms of one species that can be supported in an environment
carrying capacity
study of information about human population
demography
amount of Earth's fresh water supply that is available to plant and animal life
0.1 %
species disappears from all or part of its range
extinction
number of individuals per unit area
population density
group of organisims of the same species that live in the same area
population
type of growth represented by an s-shaped curve
logistic
age structure
coal and aluminum
non-renewable resources
major cause of species extinction
habitat destruction
oxygen, surface water, corn
renewable resources
a product that can be broken down naturally
biodegradable
competition, predation, parasitism & disease
density-dependant limiting factors
population growth of a country depends on its birthrate, __________, and its fertility
death rate
fossil fuels
land development splits a habitat into smaller parts
habitat fragmentation
type of growth that occurs when individuals of a population reproduce at a constant rate
exponential
resources that are replaced by natural processes
renewable
as resources become less available population growth slows or stops
logistic growth
the population has a large group in pre-reproductive years, therefore the population growth rate will soon be __________
rapid
half of the drinking water of United States comes from ____________
groundwater
variety of habitats, communities, and ecological processes in the living world
ecosystem diversity
natural disasters such as volcanoes and floods
density independent limiting factors
using natural resources without depleting them or causing long-term environmental harm
sustainable development
if a population has abundant space and food and is protected from predators and disease, the population will experience ______________ growth
exponential
birthrate - deathrate = _____________
population growth rate (pgr)
possible answers:
hunting & gathering, agriculture, industrial growth, urban development
populations that are introduced into a new habitat and reproduce rapidly
invasive species
wise management of natural resources
conservation
sum total of the variety of organisms in the biosphere
biodiversity