Among the mathematical indices for measuring bio-diversity, which one shows the mean species diversity in a habitat at a local scale ?

Correct Answer: A. Alpha index

Explanation: Alpha Index Alpha diversity measures the species diversity within a single habitat, community, or ecosystem at a local scale. It represents the "mean" or average species diversity in that specific, homogeneous area, such as a forest plot, pond, or soil sample. Beta Index Beta diversity measures the variation or turnover in species composition between different habitats or communities across a landscape (e.g., between two forest patches or along an environmental gradient). Gamma Index Gamma diversity represents the total species diversity across a larger region or landscape, encompassing multiple habitats (e.g., an entire mountain range or biome).