Data analysis
One-way analysis of variance was conducted to identify differences in
environmental traits and functional traits. The normality was tested
prior to one-way analysis. A logarithmic transformation was necessary to
meet the statistical requirement because the data were not normally
distributed. Redundancy analysis (RDA), a multivariate direct gradient
analysis method, was performed using the Canoco 5.0 software to
elucidate the relationship between functional traits and soil
environmental factors based on standardized data. The primary
statistical analyses, functional traits relationship, partial
correlation and curve estimation were performed using SPSS 20.0 (SPSS
Inc., Chicago, IL, USA). The CSR model was calculated by the globally
calibrated CSR analysis tool ‘StrateFy’ and the picture was output by R
(R Development Core Team 2013). Figures were plotted using Origin Pro
8.0 (Originlab Co., Northampton, MA, USA).
RESULTS