Primary Succession - In new areas of land with little or no soil, Ecological Succession - process of a biological community gradually changing into another over time., Secondary Succession - In areas where existing ecosystems have been disturbed or destroyed, Climax Community - The final step of a ecological succession, Dynamic Equilibrium - Balance between different parts of the ecosystem, Natural Disturbance - forest fires, floods, volcanic eruptions, disease, Eutrophication - Death zone, Excess of nutrients in water bodies  - algae grow out of control and deplete the oxygen in water,

Ecosystem changes

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