[R] Hierarchical ANOVA

[Romain.Mayor at ville-ge.ch]

Hello,

Does somebody could help me in the computation(formulation) of a
hierarchical ANOVA using linear model in R?
I'm working in a population biology study of an endangered species. My aim
is to see if I have effects of "Density of individuals/m2" on several
measured plants fitness traits.

As independent variables I have:

Humidity (continuous)
Nutritive substance (continuous)
LUX (continuous)
Density of individuals/m2 (continuous)
Population (categorical)
Year (categorical)

I want to test the 4 continous variables with Population as error term. And
the Population, the Year and interaction term, with the error of Population
x Year.

Thank you for any help, best regards.

Romain Mayor