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Diversity Analysis using R

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Relation http://eprints.cmfri.org.in/15731/
 
Title Diversity Analysis using R
 
Creator Varghese, Eldho
 
Subject Fisheries Statistics
 
Description A diversity index is a numerical measure that quantifies the number of distinct types (such as
species) in a dataset (a community) while also accounting for evolutionary relationships
among the individuals distributed throughout those types, such as richness, divergence, and
evenness. These indicators are numerical representations of biodiversity in a variety of ways
(richness, evenness, and dominance). The amount of distinct species present in a community
is referred to as species diversity (a dataset).
The effective number of species is the number of equally abundant species required to achieve
the same mean proportional species abundance as seen in the dataset under consideration
(where all species may not be equally abundant). Using diversity analysis, questions like
"how many species are in a sample?" and "how similar are these two samples?" are
investigated. The number of species recorded within a region is referred to as alpha diversity,
while beta diversity is defined as the number of species not common to the two regions being
compared is referred to as beta diversity and gamma diversity is defined as the total number
of species within all regions. Species richness, taxonomic or phylogenetic diversity, and/or
species evenness are all examples of species diversity. The term "species richness" refers to
the number of species present. The genetic link between distinct groupings of animals is
taxonomic or phylogenetic diversity. Species evenness measures how evenly the species'
abundances are distributed.
 
Publisher ICAR-Central Marine Fisheries Research Institute
 
Date 2022
 
Type Book Section
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/15731/1/Winter%20School%20on%20Recent%20Development%20in%20Taxonomic%20Techniques%20of%20Marine%20Fishes%20for%20Conservation%20and%20Sustainable%20Fisheries%20Management_2022_Eldho%20Varghese.pdf
Varghese, Eldho (2022) Diversity Analysis using R. In: ICAR-CMFRI -Winter School on Recent Development in Taxonomic Techniques of Marine Fishes for Conservation and Sustainable Fisheries Management. ICAR-Central Marine Fisheries Research Institute, Kochi, pp. 570-582.