In Hydrarch succession scrub stage is preccded by forest community.

Explanation

### Step-by-Step Solution:

1. **Understanding Hydrarch Succession**: Hydrarch succession refers to the ecological process that occurs in aquatic environments, leading to the gradual transformation of a water body into a terrestrial ecosystem.

2. **Stages of Hydrarch Succession**: The succession typically follows a specific sequence of stages:
- **Phytoplankton Stage**: The initial colonization by microscopic algae and plants.
- **Rooted Submerged Stage**: Aquatic plants that are submerged but have roots anchored in the substrate.
- **Rooted Floating Stage**: Plants that float on the surface but have roots in the water.
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