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).

Estimates the trophic position of a consumer relative
to a baseline species. It implements a Bayesian approach which combines an
interface to the 'JAGS' MCMC library of 'rjags' and stable isotopes. Users are
encouraged to test the package and send bugs and/or errors to
trophicposition-support@googlegroups.com.

Claudio Quezada-Romegialli

tRophicPosition

Bayesian Trophic Position Estimation with Stable Isotopes

TDF function

<dl><dt>author</dt>
<dd>could be either "Post" or "McCutchan" at the moment.</dd>
<dt>element</dt>
<dd>can be "both", "N" or "C"</dd>
<dt>type</dt>
<dd>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).</dd>
<dt>seed</dt>
<dd>integer to have replicated results</dd></dl>

Arguments

Trophic discrimination factors from bibliography — TDF

<dl>

<dt>author</dt>
<dd>could be either "Post" or "McCutchan" at the moment.</dd>


<dt>element</dt>
<dd>can be "both", "N" or "C"</dd>


<dt>type</dt>
<dd>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).</dd>


<dt>seed</dt>
<dd>integer to have replicated results</dd>

</dl>

TDF: Trophic discrimination factors from bibliography

Description

Usage

Value

Arguments

Examples