Chi-squared obtained from the Correspondence Analysis between traits (fishing, size, ecosystem type, latitude, longitude, depth and year) and key functional groups.

Between parenthesis the degrees of freedom of Covariance analysis (df). Significant total Chi-squared are bold (*** and ** indicate p<0.01 and p<0.05 respectively). Main contributors to Chi-squared indicated by {}.括号内标注协方差分析（Covariance analysis）的自由度（df）。显著的总卡方（Chi-squared）值以粗体标注（***和**分别代表p<0.01和p<0.05）。卡方值的主要贡献项以{}标注。