2.4 Data Analysis
The significant differences among the treatments were analyzed using analysis of variance (ANOVA) in a factorial design. A three-factor ANOVA on the influence of species, drought, and high temperature was conducted in IBM SPSS Statistics for Windows, version 24.0 (IBM Corp., Armonk, NY, USA). The trend chart of different indicators under different treatments was created in Origin 8.0. Canoco 4.5 was used for detrended correspondence analysis (DCA) and redundancy analysis (RDA). The data in the figures are represented as the mean ± standard error.