comp_metrics: Composition metrics

In metrix: Water Quality Metrics Calculator

Composition metrics

Description

Calculates the relative abundance of particular taxa in the assemblage in percentage terms.

Usage

comp_metrics(dataset, store = FALSE, dec_c = ".", verbose = FALSE)

Arguments

dataset	A data.frame obtained from read_data.
store	A logical value indicating if the user want to store the results in a file.
dec_c	A character used for decimal separator on results file.
verbose	A logical value indicating if progress messages should be given.

Details

Provides information on the makeup of the assemblage and the relative contribution of the populations to the total fauna (Barbour et al., 1996).

Value

This function returns a data.frame with all the calculated composition measures:

per_ephe	% Ephemeroptera.
per_molus	% Mollusca.
per_gastr	%Gastropoda.
per_biv	%Bivalvia.
per_crus	%Crustacea.
per_oli	% Oligochaeta.
per_amph	% Amphipoda.
per_ostr	% Ostracoda.
per_ephetricho	% Ephemeroptera + Trichoptera.
per_naid	% Naididae.
per_chir_dip	% Diptera Chironomidae.
per_non_chir_dip	%Diptera no Chironomidae.
per_polym	%Polymitarcidae.
per_hyal	%Hyalella.
per_coch	%Cochliopidae.
per_tricho	%Trichoptera.
per_subchiro	%Chironominae.
per_suborth	%Orthocladiinae.
per_subtany	%Tanypodinae.

Author(s)

Juan Manuel Cabrera and Julieta Capeletti.

References

Barbour MT, Gerritsen J, Griffith GE, Frydenborg R, McCarron E, White JS & Bastian ML (1996). A Framework for Biological Criteria for Florida Streams Using Benthic Macroinvertebrates. doi: 10.2307/1467948

See Also

read_data

Examples

#Load example data
example_data

#Run comp_metrics with that example_data
compmetrics<-comp_metrics(example_data)

#Check results
compmetrics

metrix documentation built on Nov. 12, 2022, 9:05 a.m.