I don't know whether this is your problem but esp.madre has only 2 levels
and so will be difficult to fit as a random variable. Whether this could
lead to the error you're getting I don't know but it will likely cause you
problems. Treat it as fixed perhaps.


andydolman@gmail.com


 str(env)
> 'data.frame':   162 obs. of  12 variables:
>  $ trampa     : Factor w/ 162 levels "ACGua-ulm111",..: 1 2 3 4 5 6 7 8 9
> 10 ...
>  $ rancho     : Factor w/ 8 levels "AC","ADC","HS",..: 1 1 1 1 1 1 1 1 1 1
> ...
>  $ esp.madre  : Factor w/ 2 levels "Gua-ulm","Pit-dul": 1 1 1 1 1 1 1 1 1 2
> ...
>  $ ind        : Factor w/ 18 levels "1","2","3","4",..: 1 1 1 1 1 1 1 1 1
> 16 ...
>  $ dist       : int  1 1 1 2 2 2 3 3 3 1 ...
>  $ rep        : int  1 2 3 1 2 3 1 2 3 1 ...
>  $ dist.bosque: int  150 150 150 150 150 150 150 150 150 50 ...
>  $ arbol100   : int  7 7 7 7 7 7 7 7 7 7 ...
>  $ cercas100  : int  4 4 4 4 4 4 4 4 4 1 ...
>  $ site.totals: num  266.56 291 1334.37 1.16 2 ...
>  $ riqueza    : int  9 21 19 3 3 8 5 4 3 22 ...
>  $ dista      : int  1 1 1 2 2 2 3 3 3 1 ...
>
>
>
>
>
>
>

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