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en.wikipedia.org/wiki/Beta_diversity

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 together with the terms alpha diversity (α-diversity) and gamma diversity (γ-diversity).

www.quora.com/What-is-the-difference-between-alpha-beta...

Beta diversity represents the differences in species composition among sites. Gamma diversity is the diversity of the entire landscape (regional species pool). Among these, alpha and gamma diversity are fairly straightforward. It's harder to grasp what beta diversity means, since it's usually used quite loosely.

www.researchgate.net/post/What_is_the_difference_between...

Beta diversity was defined by Whittaker (1972) as "the extent of species replacement or biotic change along environmental gradients." The beta diversity measures the turnover of species between ...

www.metagenomics.wiki/pdf/definition/alpha-beta-diversity

Beta diversity How different is the microbial composition in one environment compared to another? diversity in microbial community between different environments (difference in taxonomic abundance profiles from different samples).

ecologyforacrowdedplanet.wordpress.com/2016/01/14/beta...

Gamma diversity (regional diversity) is a product of both beta- and alpha-diversity (diversity at a single site). And there are lots* of different ways of measuring beta-diversity. The simplest metric for beta-diversity is termed ‘true beta-diversity’ and was defined by Whittaker in 1960 as:

socratic.org/questions/what-are-alpha-beta-and-gamma-diversity

Alpha diversity refers to the average species diversity in a habitat or specific area. Alpha diversity is a local measure. Beta diversity refers to the ratio between local or alpha diversity and regional diversity. This is the diversity of species between two habitats or regions. It is calculated by the following equation:

sciencing.com/calculate-beta-diversity-5649801.html

Beta diversity measures the change in diversity of species from one environment to another. In simpler terms, it calculates the number of species that are not the same in two different environments. There are also indices which measure beta diversity on a normalized scale, usually from zero to one.

en.wikipedia.org/wiki/Alpha_diversity

In ecology, alpha diversity (α-diversity) is the mean species diversity in sites or habitats at a local scale. The term was introduced by R. H. Whittaker together with the terms beta diversity (β-diversity) and gamma diversity (γ-diversity). Whittaker's idea was that the total species diversity in a landscape (gamma diversity) is determined by two different things, the mean species ...

www.reference.com/science/alpha-diversity-9c0825c70ef9426a

Alpha diversity deals with species in a single area, while beta diversity is a measure of the difference in diversity between ecosystems in a given area. Gamma diversity is an expression of the overall diversity of an area regardless of the ecosystems where the species are found.

www.webpages.uidaho.edu/veg_measure/Modules/Lessons/Module...

Beta Diversity = expression of diversity between habitats. In the example below, the greatest Beta Diversity is observed between Site A and C with 10 species that differ between them and only 2 species in common. Gamma Diversity = landscape diversity or diversity of habitats within a landscape or region. In this example, the gamma diversity is ...