Which of these are common to hydrach succession and xerarch succession ?

Options

A. Pioneer species
B. Seral stages
C. Climax community
D. Area where succession begins

Answer

To determine which features are common to both hydrach succession and xerarch succession, let's analyze each option provided in the question step by step.

### Step 1: Understand Hydrach Succession
- Hydrach succession begins in aquatic environments, specifically in shallow water.
- It progresses through various stages, starting with pioneer species such as phytoplankton.
- The succession eventually culminates in a climax community, which is typically a forest.

### Step 2: Understand Xerarch Succession
- Xerarch succession, on the other hand, begins in dry environments, such as bare ground or dry rocks.
- The initial pioneer species in xerarch succession are usually lichens.
- This succession also leads to a climax community, which similarly ends in a forest.

### Step 3: Analyze the Options
- **Option A: Pioneer Species** - While both successions have pioneer species, they are different (phytoplankton in hydrach and lichens in xerarch).
- **Option B: Xerarch Stages** - This option is specific to xerarch succession and does not apply to hydrach succession.
- **Option C: Climax Community** - Both successions culminate in a climax community of trees, making this a common feature.
- **Option D: Area where Succession Begins** - The starting areas are different (aquatic for hydrach and terrestrial for xerarch).

### Conclusion
The common feature between hydrach succession and xerarch succession is **Option C: Climax Community**. Both types of succession ultimately lead to a climax community dominated by trees.