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. 2016 Apr 14;6:24317. doi: 10.1038/srep24317

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Values are means ± S.E., n = 6. P-6, P-4, P-2, C, P + 2, P + 4, and P + 6 represent −60%, −40%, −20%, control (ambient), +20%, +40%, and +60% precipitation, respectively. Means with the same uppercase letter for 2011 or lowercase letter for 2012 are not significantly different (P > 0.05).