Which of the following zone of lake stratification also known as ecotone area?

Options

A. Littoral zone
B. Limnetic zone
C. Profundal zone
D. Bottum zone

Answer

**Step-by-Step Solution:**

1. **Understanding Lake Stratification**:
- Lake stratification refers to the formation of distinct thermal layers within a lake. These layers are influenced by factors such as temperature, light penetration, and depth.

2. **Identifying the Zones**:
- The main zones of lake stratification include:
- **Littoral Zone**: This is the area near the shore where sunlight penetrates, allowing for the growth of rooted plants.
- **Limnetic Zone**: This is the open water area away from the shore, where sunlight can still reach but is deeper than the littoral zone.
- **Profoundal Zone**: This is the deeper part of the lake where light does not penetrate, making it unsuitable for photosynthesis.
- **Benthic Zone (Bottom Zone)**: This is the lowest layer of the lake, which is often inhabited by organisms that live on or near the bottom.

3. **Defining Ecotone**:
- An ecotone is a transitional area between two different ecosystems or communities. It often contains species from both communities and can be rich in biodiversity.

4. **Analyzing the Zones for Ecotone Characteristics**:
- The **Littoral Zone** serves as an ecotone because it is the area that separates the terrestrial (land) vegetation from the aquatic (water) vegetation. It contains elements from both ecosystems and thus fits the definition of an ecotone.

5. **Conclusion**:
- Based on the characteristics of the zones and the definition of an ecotone, the **Littoral Zone** is the correct answer as it acts as the ecotone area in lake stratification.

**Final Answer**: The Littoral Zone is the zone of lake stratification that is also known as the ecotone area.

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