Diversity of zooplankton (zooplankton) prey in each of 5 replicate
blocks (block) of three treatment levels (treatment). By
default, block is not coded as a factor.
Arguments
source
inferred from Svanbäck, R. and D.I. Bolnick. 2007.
Intraspecific competition drives increased resource use diversity within a
natural population. Proceedings of the Royal Society of London Series
B, Biological Sciences 274: 839-844.