Energy Pyramid
A Diagram Showing The Flow Of Energy Through Trophic Levels In A Food Web, With Energy Decreasing At Higher Levels.

Water Cycle
The Continuous Movement Of Water Through Evaporation, Condensation, And Precipitation In Ecosystems.

Nitrogen Cycle
A Biogeochemical Cycle Involving Nitrogen Fixation, Nitrification, And Denitrification.

Carbon Cycle
A Biogeochemical Cycle Involving The Movement Of Carbon Through Photosynthesis, Cellular Respiration, And Decomposition.

Biogeochemical Cycle
The Movement Of Elements Such As Carbon, Nitrogen, And Water Through Ecosystems.

Biomagnification
The Increase In Concentration Of Toxic Substances At Higher Trophic Levels In A Food Web.

Trophic Level
A Position In A Food Chain Representing How An Organism Obtains Energy.

Keystone Species
A Species That Has A Disproportionately Large Effect On Its Ecosystem Stability.

Secondary Succession
The Recovery Of An Ecosystem After A Disturbance That Leaves Soil Intact.

Primary Succession
The Development Of An Ecosystem In An Area With No Soil, Such As Bare Rock.