Name pioneer community in lithosere .

Explanation

**Step-by-Step Solution:**

1. **Understanding Pioneer Community**: A pioneer community is the first group of organisms that colonize a barren or disturbed environment during ecological succession. These organisms are crucial for initiating the process of ecosystem development.

2. **Defining Lithosere**: Lithosere refers to a type of ecological succession that occurs on bare rocks. The term "lithos" means rocks, indicating that this succession begins in a rocky environment where soil is not initially present.

3. **Identifying the First Organisms**: In lithosere, the first organisms to colonize the bare rocks are crucial for soil formation and ecosystem development.

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