Define 'sere' .

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Ecological Succession**: Begin by defining ecological succession, which is the process through which ecosystems change and develop over time. This process involves a series of stages that lead to a stable community.

2. **Identify the Stages**: Recognize that ecological succession typically starts with a pioneer community. This is the first group of organisms that colonize a barren or disturbed environment.

3. **Define 'Sere'**: A 'sere' is a term used to describe the sequence of changes that occur during ecological succession. It encompasses all the stages from the initial pioneer community to the final stable community known as the climax community.

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