densi_metrics: Density metrics

In metrix: Water Quality Metrics Calculator

Density metrics

Description

Calculates density measures

Usage

densi_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

Density is a universal measure used in all types of biological studies. Density is best classified with trophic measurements because it is an element of production; however, it is difficult to interpret because it requires careful quantification and is not monotonous in response (i.e., density can decrease or increase in response to contamination) (Barbour et al., 1996).

Value

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

den_chir_dip	Diptera Chironomidae density.
den_non_chir_dip	Diptera no Chironomidae density.
den_ephe	Ephemeroptera density.
den_molus	Mollusca density.
den_gastr	Gastropoda density.
den_biv	Bivalvia density.
den_crus	Crustacea density.
den_nais	Naididae density.
den_lhoff	Limnodrilus hoffmeisteri density.
den_bothr	Bothrioneurum density.
den_tubi	Tubifex density.
den_dero	Dero density.
den_prist	Pristina density.
den_chiro	Chironomus density.
den_nais	Nais density.
den_hele	Heleobia density.
den_subchiro	Chironominae density.
den_suborth	Orthocladiinae density.
den_subtany	Tanypodinae density.
den_t	Total density.
den_t_bothr	Bothrioneurum/Total density.
den_t_lhoff	Limnodrilus hoffmeisteri/Total density.
den_t_tubi	Tubifex/Total density.
den_t_dero	Dero/Total density.
den_t_prist	Pristina/Total density.
den_t_chiro	Chironomus/Total density.
den_oli	Oligochaeta density.
den_tricho	Trichoptera density.
den_ostr	Ostracoda density.
den_amph	Amphipoda density.
den_polym	Polymitarcidae density.
den_hyal	Hyalella density.
den_coch	Cochliopidae density.
den_chironomidae	Chironomidae density.

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 densi_metrics with that example_data
densimetrics<-densi_metrics(example_data)

#Check results
densimetrics

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