Hello, I am posting this to R-help and Ecolog-L, in hopes that enough Ecologgers are R users and enough R-help users are ecologists. Please forgive the cross-posting.
I deleted a number of species from a canonical correspondence analysis (CCA) model after using the function goodness.cca in vegan. In his explanation of the diagnostic tools for CCA (http://cc.oulu.fi/~jarioksa/softhelp/vegan/html/goodness.cca.html), Jari Oksanen states that "It is a common practise to use goodness statistics to remove species from ordination plots". However, I have not been able to find references on this "common practice" in the literature. I may be using inappropriate search terms?? However, if anybody can point me towards some cite-able references/rules of thumb on this, I would very much appreciate it. And yes, I am also aware that Jari goes on to say that deleting species isn't always a good idea. Thank you! Lauren Quinn _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. http://clk.atdmt.com/GBL/go/177141665/direct/01/
