Belowground biomass responses to elevated CO₂ and N.

<p>Interaction plots of least squares means (± standard error for C–F) of the belowground biomass of species (A and B), genetic lineages (C and D) and subgenera (E and F) with control N and 30 kg ha⁻¹ of N added (High N) under both ambient (left panels) and elevated CO₂ (right panels). Standard errors are not presented on the species panels (A–B) due to space constraints. Each colour and line (solid/dashed) combination represents each species, genetic lineage or subgenus.