List the various communities of xerosere (lithosere)

Explanation

### Step-by-Step Solution:

1. **Understanding Xerosere (Lithosere)**:
- Xerosere, also known as lithosere, refers to a type of ecological succession that occurs in dry, rocky environments. It involves the gradual development of a community from bare rock to a mature ecosystem.

2. **Pioneer Community**:
- The first community to establish itself in a xerosere is the **Crustose Lichen**. These organisms are capable of surviving in harsh conditions and are crucial for soil formation.

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