Plant functional trait diversity regulates the nonlinear response of productivity to regional climate change in Tibetan alpine grasslands.

In general, we found that PUE showed an increasing trend along the HMI gradient from approximately 0.18 mm °C −1 to the most humid sites 0.4 mm °C −1 ( Fig. 3c ), being partly consistent with the positive linear relationship between PUE and mean annual precipitation (MAP) reported by Hu, et al . 42 .

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