[R] packages for ecologists

[Martin Wegmann]

Hello R-user, 

sorry for this very off-topic question. 

But I shall present R to my dept. (pro's and con's and what it can do).
The pro's and con's are easy but not what R can do (additional to the "normal" 
statistics).
I looked through the packages, but the enormous amount of packages makes it 
very difficult for me to decide which one is worth mentioning.

I used only a small part of all R packages (mainly recommended packages and 
grasper) and would like to know which package for ecologist has to be 
mentioned. 

I would greatly appreciate if you can tell me which packages you think are 
very useful for ecolgical research in R e.g. vegan, ade4, ... 

thanks in advance, regards Martin