primary productivity depends on diversity

Plant genotypic diversity predicts community structure and governs an ecosystem process.

Science 18th August (2006) pp.966-968.

G.M. Crutsinger et al studied the effects on community structure of population genotypic diversity.

http://www.sciencemag.org/cgi/content/abstract/313/5789/966
http://www.sciencemag.org/cgi/content/full/313/5789/966/DC1

Solidago altissima (goldenrod) was grown in plots and the number of genotypes per plot was manipulated. They estimated aboveground net primary productivity (ANPP) and censused arthropods.