Published by the Foundation for Open Access Statistics Editors-in-chief: Bettina Grün, Torsten Hothorn, Rebecca Killick, Edzer Pebesma, Achim Zeileis    ISSN 1548-7660; CODEN JSSOBK
Authors: Sarah C. Goslee, Dean L. Urban
Title: The ecodist Package for Dissimilarity-based Analysis of Ecological Data
Abstract: Ecologists are concerned with the relationships between species composition and environmental framework incorporating space explicitly is an extremely flexible tool for answering these questions. The R package ecodist brings together methods for working with dissimilarities, including some not available in other R packages. We present some of the features of ecodist, particularly simple and partial Mantel tests, and make recommendations for their effective use. Although the partial Mantel test is often used to account for the effects of space, the assumption of linearity greatly reduces its effectiveness for complex spatial patterns. We introduce a modification of the Mantel correlogram designed to overcome this restriction and allow consideration of complex nonlinear structures. This extension of the method allows the use of partial multivariate correlograms and tests of relationship between variables at different spatial scales. Some of the possibilities are demonstrated using both artificial data and data from an ongoing study of plant community composition in grazinglands of the northeastern United States.

Page views:: 20474. Submitted: 2007-01-09. Published: 2007-09-30.
Paper: The ecodist Package for Dissimilarity-based Analysis of Ecological Data     Download PDF (Downloads: 24164)
ecodist_1.1.2.tar.gz: R source package Download (Downloads: 2486; 867KB) v22i07.R: R example code from the paper Download (Downloads: 2426; 1KB)

DOI: 10.18637/jss.v022.i07

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Paper: Creative Commons Attribution 3.0 Unported License
Code: GNU General Public License (at least one of version 2 or version 3) or a GPL-compatible license.