Loss of plant biodiversity eliminates stimulatory effect of elevated CO2 on earthworm activity in grasslands

Arnone, J.A. III, Zaller, J. G., Hofer, G., Loss of plant biodiversity eliminates stimulatory effect of elevated CO2 on earthworm activity in grasslands, Oecologia, 171, 613-622, 10.1007/s00442-012-2585-4