TDF: Trophic discrimination factors from bibliography

In AndrewLJackson/tRophicPosition: Bayesian Trophic Position Estimation with Stable Isotopes

Trophic discrimination factors from bibliography

Description

This function returns trophic discrimination factors (TDF), given an author, element and a type. For convenience 'type' includes a number of categories depending on the author. At the moment it includes TDF data from Post (2002) and from McCutchan et al (2003).

Usage

TDF(author = "Post", element = "both", type = NULL, seed = 3)

Arguments

author	could be either "Post" or "McCutchan" at the moment.
element	can be "both", "N" or "C"
type	this argument only works for "McCutchan" author (their Table 3). "all" returns all TDF data; "whole" and "muscle" returns TDF separated per type analysis; "acidified" and "unacidified" returns TDF separated per acidification; and "Rainbow Trout" and "Brook Trout" returns TDF separated per fish species (according to their Table 1).
seed	integer to have replicated results

Value

a list (if element = "both") or a vector (if element ="N" or element = "C") containing TDF values

Examples

TDF(author = "McCutchan", element = "N")

AndrewLJackson/tRophicPosition documentation built on Jan. 2, 2023, 12:14 p.m.