Response to Comment on "Unexpected reversal of C<sub>3</sub> versus C<sub>4</sub> grass response to elevated CO<sub>2</sub> during a 20-year field experiment".

Reich, Peter B; Hobbie, Sarah E; Lee, Tali D; Pastore, Melissa A · Science · 2018

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Abstract

Nie and colleagues suggest a key role for interannual climate variation as an explanation for the temporal dynamics of an unexpected 20-year reversal of biomass responses of C<sub>3</sub>-C<sub>4</sub> grasses to elevated CO<sub>2</sub> However, we had already identified some climate-dependent differences in C<sub>3</sub> and C<sub>4</sub> responses to eCO<sub>2</sub> and shown that these could not fully explain the temporal dynamics we observed.

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