read_iti: Read and Validate Infaunal Trophic Index Files

In benthos: Marine Benthic Ecosystem Analysis

Read and Validate Infaunal Trophic Index Files

Description

This function reads and checks files containing Infaunal Trophic Index (ITI) data (Gittenberger & Van Loon, 2013)

Usage

read_iti(filename)

validate_iti(.data)

Arguments

filename	name of the ITI file (character).
.data	table in ITI-format

Details

The function performs the following tasks:

• checks the existence of filename;

• checks availablitity of required columns (case insensitive), i.e., TAXON and GROUP;

• removes redundant spaces;

• removes duplicated records.

• checks if all ITI classes are I, II, III, or IV

The column 'GROUP' contains the Roman numerals I, II, III, and IV, with the following meaning:

• I: suspension feeders;

• II: interface feeders;

• III: surface deposit feeders;

• IV: subsurface deposit feeders.

Value

A data frame with columns TAXON containing taxa and GROUP containing user-defined ITI-groups (see Gittenberger & Van Loon, 2013).

Functions

• validate_iti(): validator for ITI-format

References

Gittenberger A. and W. van Loon, 2013. Sensitivities of marine macrozoobenthos to environmental pressures in the Netherlands. Nederlandse Faunistische Mededelingen 41: 79-112.

benthos documentation built on Aug. 22, 2022, 5:07 p.m.