Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO₂ , warming, and drought.

While warming had a marginally significant negative effect on protein depolymerization ( p = .0630), eCO 2 significantly increased amino acid consumption rates (Table 1 , Figure 2a,b ).

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We did not find an overall significant positive effect of warming on the process rates, which were measured at in situ field temperatures, but found a highly significant interactive effect between season and temperature (Table 1 ) on organic N cycling processes, as well as on organic N mineralization.

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