search for: vegetatio

The design decision in metaMDS says that it uses: Minchin, P.R. (1987) An evaluation of relative robustness of techniques for ecological ordinations. Vegetatio 71, 145-156. This is the paper that I found by the same name. Is this the correct reference? Minchin, Peter R.1987. An Evaluation of the Relative Robustness of Techniques for Ecological Ordination. Vegetatio. Vol. 69, No. 1/3: 89-107. In this paper the double standardization (wisconsin()) is u...

A colleague has just passed me this interesting address: http://cc.oulu.fi/~jarioksa/softhelp/vegan.html "Vegan: R functions for vegetation ecologists" "Vegan package is intended to help vegetation ecologists and other community ecologists to use R. It is not a completely self-contained package, but it complements other R functions. .../... At this first stage, vegan implements some of the functionality of Peter Michin...

I'm trying to perform a mantel test that ignores specific pairs in my distance matrices. The reasoning is that some geographic distances below a certain threshold suffer from spatial autocorrelation, or perhaps ecological relationships become less relevant that stochastic processes above a certain threshold. The problem is that I can't find a way to do it. If I replace values in either or

...es and the species data. In this way these two sets of data are then directly related." Ref 1: ter Braak, CJF (1986) Canonical correspondence analysis: A new eigenfactor technique for multivariate direct gradient analysis. Ecology, 67:1167-1179 Ref 2: ter Braak, CJF (1987) The analysis of vegetation-environment relationships by canonical correspondence analysis. Vegetatio, 64:69-77 More general references are: Jongman, RHG., Ter Braak, CJF., and, van Tongeren, OFR. (1995) Data analysis in community and landscape ecology. CUP. Kent, M. & Coker, P. (1992) Vegetation description and an...

Is there an R function that does canonical correspondence analysis. Can it be done using the VR function corresp()? If not, how hard it be to write R code to do it? I am a population biologist with long but patchy programming experience in C, Smalltalk, Java and other languages. Thanks, Patrick Foley patfoley at csus.edu

...gavin.simpson@ucl.ac.uk Message-ID:     <c502a9e10905270831g5adbd94dk9ef72c488f517658@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 The design decision in metaMDS says that it uses: Minchin, P.R. (1987) An evaluation of relative robustness of techniques for ecological ordinations. Vegetatio 71, 145-156. This is the paper that I found by the same name.  Is this the correct reference? Minchin, Peter R.1987.. An Evaluation of the Relative Robustness  of Techniques for Ecological Ordination. Vegetatio. Vol. 69, No. 1/3: 89-107. In this paper the double standardization (wisconsin()) is...