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Whittaker (1972) described three terms for measuring biodiversity over spatial scales: alpha, beta, and gamma diversity. Alpha diversity refers to the diversity within a particular area or ecosystem, and is usually expressed by the number of species (i.e., species richness) in that ecosystem.
- 8: Introduction to Utilitarian Valuation of Biodiversity
Glossary; Determining the value or worth of biodiversity is...
- Ecosystem
Ecosystem - 7: Alpha, Beta, and Gamma Diversity - Biology...
- Nora Bynum
Nora Bynum - 7: Alpha, Beta, and Gamma Diversity - Biology...
- Chapter
Chapter - 7: Alpha, Beta, and Gamma Diversity - Biology...
- 8: Introduction to Utilitarian Valuation of Biodiversity
14 paź 2016 · Alpha diversity is the species diversity present within each ecosystem on a landscape. Beta diversity is represented by the species diversity between any two communities. Gamma diversity of is the species diversity across the entire landscape, taken as one unit.
While alpha and beta diversity are distinct concepts, they are interconnected and provide complementary information about biodiversity patterns. Alpha diversity focuses on the local scale, providing insights into the richness, evenness, and dominance of species within a specific habitat.
Whittaker (1972) described three terms for measuring biodiversity over spatial scales: alpha, beta, and gamma diversity. Alpha diversity refers to the diversity within a particular area or ecosystem, and is usually expressed by the number of species (i.e., species richness ) in that ecosystem.
In ecology, beta diversity (β-diversity or true beta diversity) is the ratio between regional and local species diversity. The term was introduced by R. H. Whittaker [1] together with the terms alpha diversity (α-diversity) and gamma diversity (γ-diversity).
Pfam finds 2 major domains, a pyruvate kinase beta-barrel domain and a pyruvate kinase alpha/beta domain. Domains determined by both programs show about a 75% overlap. At a simpler level, domains are built from the kinds of motif structures we discussed above.
Beta-diversity of microbial communities illustrates the relative differences in species composition between habitats (Pane et al., 2020). Alpha diversity is only concerned about single sample analysis. Therefore despite of similar alpha diversity value, two different samples may have very different community compositions.
