fish

<p>A dataset containing values for three stable isotopes measured in the muscle tissue of four species of arctic fish. For use in examples.</p>

datasets

Implementation of a probabilistic method to calculate 'nicheROVER' (_niche_ _r_egion and niche _over_lap) metrics using multidimensional niche indicator data (e.g., stable isotopes, environmental variables, etc.). The niche region is defined as the joint probability density function of the multidimensional niche indicators at a user-defined probability alpha (e.g., 95%).  Uncertainty is accounted for in a Bayesian framework, and the method can be extended to three or more indicator dimensions.  It provides directional estimates of niche overlap, accounts for species-specific distributions in multivariate niche space, and produces unique and consistent bivariate projections of the multivariate niche region.  The article by Swanson et al. (2015) <doi:10.1890/14-0235.1> provides a detailed description of the methodology.  See the package vignette for a worked example using fish stable isotope data.

Martin Lysy

nicheROVER

Niche Region and Niche Overlap Metrics for Multidimensional
Ecological Niches

Ashley D. Stasko

Heidi K. Swanson

fish function

<p>A data frame with 278 rows (observations) and 4 columns (species, \(\delta^{15}N\), \(\delta^{13}C\), and \(\delta^{34}S\)).</p>

fish: Fish stable isotope dataset.

Description

Usage

Arguments

Format

Details

Examples