Understanding Local Diversity: Alpha Diversity Explained

The question asks to identify the term for the diversity of organisms within the same community or habitat, also referred to as local diversity. Let's explore the different types of diversity to understand which term fits this definition.

Types of Biodiversity

• Alpha Diversity: This refers to the diversity within a specific habitat or ecosystem. It measures the number of species and their relative abundance in a particular area or community. It is often called local diversity.
• Beta Diversity: This measures the diversity between different communities or habitats. It quantifies how species composition changes across different locations or environmental gradients.
• Gamma Diversity: This represents the total species diversity across a larger region or landscape, encompassing multiple habitats. It is essentially the overall diversity of a geographical area.
• Genetic Diversity: This type of diversity focuses on the variation of genes within a single species. It looks at the different alleles and genotypes present in a population.

Matching the Definition

The question specifically defines the diversity being asked about as the diversity within the same community/habitat and explicitly states it is also called local diversity. Based on the definitions above:

• Alpha diversity perfectly matches this description as it is the measure of diversity within a single habitat or community (local diversity).
• Beta diversity measures differences between communities, not within one.
• Gamma diversity measures diversity across a broader region, not just a single habitat.
• Genetic diversity focuses on genes within a species, not the variety of species within a habitat.

Therefore, the diversity of organisms which share the same community/habitat and is also called local diversity, is referred to as Alpha diversity.