Water Quality 1-30-13

How organisms interact with one another and with their environment

Living and non-living components

Non-living component or physical factors as soil, rainfall, sunlight, and temperatures

Living components are other organisms

Individual organisms

Organisms of same species in same area

Several populations in the same area

Community plus abiotic factors

All ecosystems on earth

Flowing water

Still water

An area of land where water from rain and melting snow or ice drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean

Delicate balance

Two species do not interact

Both benefit

One benefits, other neutral

One benefits, one harmed but not killed

One benefits, other killed

Cyclic

One way

A graph represents trophic level numbers within an ecosystem. The primary producer level is at the base of the pyramid with the consumer levels above

Compares the number of individuals in each trophic level

Compares the total dry weight of the organisms in each trophic level

Compares the total amount of energy available in each trophic level. This energy is usually measured in kilocalories