Hydrarch succession and Xerarch succession doesn't differ in

Options

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

Answer

To solve the question regarding the differences between Hydrarch succession and Xerarch succession, we will analyze the characteristics of both types of ecological succession step by step.

### Step-by-Step Solution:

1. **Define Hydrarch Succession**:
- Hydrarch succession is a type of ecological succession that begins in aquatic environments (water bodies) and progresses towards a mesic (moderately moist) environment.
- The initial species in this succession are typically phytoplankton.

2. **Define Xerarch Succession**:
- Xerarch succession, on the other hand, starts in dry, barren environments such as bare rocks and moves towards a mesic condition.
- The pioneer species in xerarch succession are usually lichens.

3. **Identify the Climax Community**:
- Both Hydrarch and Xerarch successions can lead to a climax community, which is a stable and mature ecological community.
- In both cases, the climax community is often a forest.

4. **Examine the Pioneer Species**:
- The pioneer species differ between the two types of succession. In Hydrarch succession, the pioneer species are phytoplankton, while in Xerarch succession, they are lichens.

5. **Consider the Seral Stages**:
- The intermediate or seral stages in both successions are also different. Hydrarch succession will have a series of stages that include various aquatic and semi-aquatic plants, while Xerarch succession will include stages that involve colonization by mosses, grasses, and shrubs.

6. **Evaluate the Area of Initiation**:
- The area where each type of succession begins is different. Hydrarch succession starts in water bodies, while Xerarch succession begins on bare rocks.

7. **Conclusion**:
- The only aspect where Hydrarch and Xerarch successions do not differ is in their climax community, which is a forest in both cases.

### Final Answer:
The correct answer is that Hydrarch succession and Xerarch succession do not differ in their **climax community**.