Which of the following is also called as regional diversity ?

Options

A. Alpha diversity
B. Beta diversity
C. Gamma diversity
D. Species diversity

Answer

To solve the question "Which of the following is also called as regional diversity?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**: Familiarize yourself with the terms related to biodiversity: alpha diversity, beta diversity, gamma diversity, and species diversity.

2. **Identify Definitions**:
- **Alpha Diversity**: Refers to the diversity within a specific area or ecosystem. It measures the number of species in a particular habitat.
- **Beta Diversity**: Represents the diversity between two or more ecosystems. It measures the change in species composition between different habitats.
- **Gamma Diversity**: This is the overall diversity for different ecosystems within a region. It measures the total number of species across all ecosystems in a particular region.
- **Species Diversity**: Refers to the variety of species within a specific ecosystem, including their relative abundance.

3. **Analyze the Options**:
- **Option 1: Alpha Diversity** - This is incorrect as it refers to diversity within a single area.
- **Option 2: Beta Diversity** - This is incorrect as it refers to diversity between different ecosystems.
- **Option 3: Gamma Diversity** - This is correct as it refers to the total number of species across multiple ecosystems in a region, making it synonymous with regional diversity.
- **Option 4: Species Diversity** - This is incorrect since it focuses on the number of different species in a single ecosystem.

4. **Conclusion**: Based on the definitions and analysis, the correct answer to the question is **Option 3: Gamma Diversity**, which is also called regional diversity.