Ecology

is the scientific study of interactions among

organisms with each other and with the environment.

all life is found on this layer

Organisms and their environment are ______.

Every organism relies on other organisms to survive.

What are the levels of organization?

• Individual

  population

  community

  ecosystem

  biome

  biosphere

• Individual

  population

  community

  biome

  ecosystem

  biosphere

A combination of the communities

and the physical (nonliving) environment.

• ecosystem

• biome

a large area that has a particular climate, and

particular species of plants and animals that live there

(tundra, rainforest, desert).

• biome

• ecosystem

the variety of organisms, the organisms

genetic differences, and the ecosystems in which they

occur.

• biodiversity

• biomass

A regular

progression of

species of

replacement over

time

• succession

• primary succesion

• secondary succession

succession that occurs where no soil exists

• primary succession

• secondary succession

The first species to populate the area are called

• pioneer species

• species

• receding glacier