Genotypic diversity of a dominant species Leymus chinensis inhibited ecological function of species diversity in the Inner Mongolia Steppe

Community ecologists have focused on whether there exists an interactive effect between species diversity and genotypic diversity of dominant species on community ecological function in recent years. In the present study, we selected some common species in the Inner Mongolia Steppe as study objects, and examined how the genotypic diversity of the dominant species, the species diversity of common species and their interactions influenced the community biomass.(1) Genotypic diversity of Leymus chinensis, species diversity, and their interactions did not significantly influence the community aboveground, belowground, or total biomass(P>0.05).(2) The genotypic diversity of L. chinensis, species diversity, and their interactions significantly influenced diversity effects(net diversity effect, complementarity effect, and selection effect) on community biomass(P