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#alpha diversity

3 public questions tagged with this topic.

BIODIVERSITY & IDH

Which of the following shows greater alpha diversity?

Alpha diversity is defined within a single local habitat or community. Among the scale descriptions given, “single habitat” is therefore the appropriate unit for an alpha-diversity measurement. An ecosystem may contain several habitat types, multiple communities explicitly span a broader comparison, and a whole region corresponds to gamma diversity. The wording “greater alpha diversity” is imprecise because a spatial category alone does not guarantee a larger numerical value; actual richness and abundance data are needed to decide which specific habitat is most diverse. The scientifically vali

Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation

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BIODIVERSITY

Which pair shows highest alpha diversity?

Alpha diversity concerns the species diversity within one local community. A ranking that assigns community A the highest alpha diversity implies that A has the largest within-community richness, the greatest evenness, or the highest value of a specified composite index relative to B, C, and D. The criterion must be kept consistent: richness counts species only, Shannon diversity weights both richness and evenness, and Simpson-based diversity places greater emphasis on common species. Consequently, a community with the longest species list need not rank highest by every index if it is overwhel

Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation

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BIODIVERSITY

Which region shows maximum α and β diversity respectively?

Alpha diversity describes richness and abundance within a single local community, whereas beta diversity describes compositional change among communities. Thus, identifying the region labelled Q as having maximum alpha diversity requires Q to contain the richest local assemblage, or the assemblage with the greatest combined richness and evenness if an index is supplied. Identifying S as having maximum beta diversity requires the greatest species turnover among its sampled sites: sites in S should share relatively few species and differ strongly in composition. Beta diversity is not simply the

Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation

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