Primary Succession Vs. secondary succession
The difference between primary succession and secondary succession is that primary succession occurs on land that has had no previous growth, but secondary succession occurs on land where there has been previous growth and the soil and seed bank makes up the substrate.
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Brush fire in Tanzania burn down large areas of trees. After the fire moves, secondary succession sets in, fertilizing the soil and growing small plants and trees again until the forest, after hundreds of years, has grown back.