The number of taxa present within a particular area or an ecosystem is

Options

A. α- Diversity
B. β- Diversity
C. γ- Diversity
D. None

Answer

To solve the question regarding the number of taxa present within a particular area or an ecosystem, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the term that describes the number of taxa (species or groups of organisms) present in a specific area or ecosystem.

2. **Identify the Options**: The options provided are:
- a) Alpha diversity
- b) Beta diversity
- c) Gamma diversity
- d) None of the above

3. **Define Each Term**:
- **Alpha Diversity**: Refers to the mean species diversity in a particular site or habitat at a local scale. It is concerned with the number of species (taxa) in a specific area.
- **Beta Diversity**: Measures the change in species composition between different habitats or ecosystems. It compares the diversity between ecosystems.
- **Gamma Diversity**: Refers to the total diversity of a region, encompassing multiple ecosystems or habitats.
- **None of the Above**: This option implies that none of the previous terms accurately describe the number of taxa in a specific area.

4. **Analyze the Definitions**: Since the question specifically asks for the number of taxa within a particular area or ecosystem, we need to focus on the definition of alpha diversity. Alpha diversity is specifically about the number of species in a localized area.

5. **Conclusion**: Based on the definitions, the correct answer to the question is **Alpha Diversity** (option a), as it directly relates to the number of taxa present in a specific area or ecosystem.

### Final Answer:
The number of taxa present within a particular area or an ecosystem is referred to as **Alpha Diversity**.

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