[R-sig-eco] guidance required (GLM?)
Christopher Cesar
C.Cesar at apemltd.co.uk
Wed Aug 24 11:02:45 CEST 2011
Hi all,
I have carried out experimental removal of bivalves at 2 intertidal shores. Bivalves were removed by raking of surface sediments. I wish compare the biomass values of for a total of 8 species between the 2 shores
My 3 treatments are: Undisturbed Controls (Cont), Procedural Controls (Proc) and Experimetnally Fished (Fished).
As Fished and Proc have both experienced disturbance, I set the model using 2 factors as follows:
Controls Procedural Fished
Raked 0 1 1
Fished0 0 1
As a newcomer to R (& stats!), I am unsure as to how to proceed.
i am currently adopting the approach
model<-glm(biomass~Shore*Raked*Species+Shore*Fished*Species)
And then run post-hoc adjusted pairwise comparisons between signifcant terms.
Does this look OK to you guys?
Many, many thanks
Chris
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