lme model with 3 categorical and 3 continuous variables - output coefficients?

#1
Hi,

I have a regression model with:

3 continuous variables
3 categorical variables
- taxon= 4 levels --> I get 3 coefficients in the MLM output (OK)
- continent= 5 levels --> I get 4 coefficients in the MLM output (OK)
- land cover= 2 levels --> I get both 2 coefficients in the MLM output (do you know why?, I was expecting only 1 coefficient)

Thank you very much

Mireia