Plant diversity surpasses plant functional groups and plant productivity as driver of soil biota in the long term.

Interestingly, plant species richness remained significant or marginally significant even when fitted after plant functional groups richness in affecting microbial biomass in 2006 ( F 1,70 = 4.67; P = 0.034), Collembola density in 2004 ( F 1,66 = 8.53; P = 0.005), Oribatida density in 2008 ( F 1,66 = 4.95; P = 0.030), macrofauna herbivore density in 2008 ( F 1,71 = 3.34; P = 0.072), macrofauna herbivore diversity in 2004 ( F 1,71 = 3.90; P = 0.051) and 2008 ( F 1,71 = 6.87; P = 0.011), and macrofauna decomposer diversity in 2008 ( F 1,71 = 7.03; P = 0.010).

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