The world around us is slowly and constantly changing. We might never see the small alterations happen, but many years later changes will surly be visible. Over time small changes add up and soon the whole ecosystem is different. This slow change in the land and habitat is called ecological succession. Animals, plants, and weather are some factors that cause this type of change in an ecosystem.
Ecological succession begins with a pioneer community. In many cases lichens are the "pioneers." Lichens bre
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