becks: Beck's Index

Description Usage Arguments Value

Description

Beck's Index

Usage

1
becks(taxa.wide, taxa.rank, master.df, beck.column, beck.version = 1)

Arguments

taxa.wide

Taxonomic counts aggregated at the specific taxonomic classification (e.g., Order, Family, or Genus) in a wide data format. Use the wide function to prepare the data.

taxa.rank

The taxonomic rank used to perform the analysis. You must sepecify either "FAMILY" or "GENUS" (Defualt = "FAMILY").

master.df

A master taxa list including taxonomic ranks Phylum through the specified taxonomic rank (Family or Genus) and the an associated list of tolerance values. The default is set to the master taxa list included in the BIBI package. The master taxa list can be viewed with the following script: master.df <- data(master)

beck.version

The version of Beck's Index specified as 1 or 3. The defualt is 1, the orginal Beck's Index: 2(S1) + 1(S2) + 3(S3) where: S# = Taxa richness at each level of Beck's classifications (0-3). Beck's Index version 3 is calculated as specified by PADNR: 3(S0) + 2(S1) + 1(S2) + 3(S3) where: S# = Taxa richness at each level of Beck's classifications (0-3).

beck.colum

The name of the column in the master.df that contains Beck values.

Value

Beck's Biotic Index produces weighted richness values, which favors organisms sensitive to degradation (Beck Classes 0 and 1).


zsmith27/Benthos documentation built on May 5, 2019, 2:38 a.m.