[R] null model for a single species?

[Mike Marchywka]

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> Date: Mon, 7 Mar 2011 14:15:49 +0100
> From: Johannes.Penner at mfn-berlin.de
> To: r-help at r-project.org
> Subject: [R] null model for a single species?
>
> Dear List members,
>
> I would like to test whether an observed occupancy of lakes in a landscape has occurred randomly (by chance) or not.
>
> How can I do that? The problem is that it concerns only a single species and I would like to use binary data only.
>
> At first I thought of generating null models and test the observed occupancy against the randomly generated one. However, this needs more than one species...
>
[[elided Hotmail spam]]

Try a specialized list for eco or whatever applies. I'm not sure it would be obvious
to many people here what you are trying to test or why you need another speicies.
There are probably well known approaches that are just assumed among specialists.

To refer to something in a set of obervations as an  effect of an identifiable
cause as opposed to "statstical fluctuation" presumbly requires some notion
of the features of each so you could make a testable null hypothesis. Even
noise has a cause, it is just not something you care about. 




>
> Best regards
> Johannes Penner
>