Alpha diversity is biodiversity present
(a) within community
(b) between communities
(c) ranges of communities
(d) none of these

Options

A. within community
B. between communities
C. ranges of communities
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding Biodiversity Types**: Biodiversity can be categorized into four types: alpha, beta, gamma, and delta diversity. Each type refers to different aspects of biodiversity within ecosystems.

2. **Defining Alpha Diversity**: Alpha diversity specifically refers to the diversity of species within a particular community or habitat. It measures the number of different species present in a specific area.

3. **Identifying the Correct Option**: The question asks about alpha diversity. Since alpha diversity is defined as the biodiversity present within a community, the correct answer is (a) within community.

4. **Clarifying Other Options**:
- Option (b) refers to beta diversity, which is the diversity between different communities.
- Option (c) refers to gamma diversity, which encompasses the overall diversity across multiple communities.
- Option (d) states none of these, which is incorrect as we have identified option (a) as correct.

5. **Conclusion**: Therefore, the correct answer to the question is (a) within community.

**Final Answer**: (a) within community

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