The transformation from an agricultural to industrial nation
Increase in the number of people in a territory or state
The number of individuals of a species that an ecosystem can support.
A community that's in equilibrium and has little or no change in species in the following years
Population growth rate decreases and number of individuals increases until growth rate reaches 0 and population reaches its maximum.
Expansion in duration or space
When the population doubles
The change in population over time
The first species to move into an ecosystem.
Any form of life
Total number of people in an area
Populations that interact together in an ecosystem
Living organisms that work together as one unit in a non-living enviornment
Region of Earth inhabited by a community
Layer of soil, water, and air that sustains life.
A chain of organisms that each eachother
Many food chains put together to make a web
A herbavore which eats plants
A carnivore which eats meat
A carnivore at the top most level of the food chain
Organisms that produce their own energy from the sun
A group of organisms that occupy the same position in a food chain
Forests with heavy annual rainfall
A forest with trees that purposely lose their leaves just to grow them back again later
Forests with mostly cone-bearing trees
An area with little rain fall and mostly no vegetation.
Land where grass or grasslike vegetation grows. Savanna is flat grassland.
Having low salt concentration
Salty bodies of water
The number and variety of organisms in a geographic region.
An ecosystem of all living things.
An ecosystem of non-living things
Really diverse spots on the earth near the equator
Conditions of the enviornment that limit the growth of a species.
The bubonic plague that happened during the middle ages and killed half the people in western Europe
A vast treeless plain in the Arctic regions where subsoil is permanently frozen.
the process in which communities of an ecosystem change over time
Occurs in places where an ecosystem has never existed and there is no soil
Process that begins in an ecosystem when something has disturbed or destroyed the natural community and has just soil.
The addition of harmful chemicals in natural water
Pollution that comes from a single source
water pollution that does't come from a single source, but from many different sources
An underground bed or layer yielding ground water for wells and springs. ect.