extremely significantP < 0.001
The results suggested that ( Table 2 ) water-salinity gradients had extremely significant effects on all the above- and below-ground traits ( P < 0.001); the effects of the species on above-ground traits and below-ground biomass were very significant ( P < 0.001), and on N, the P concentration of the below-ground tissues was also significant ( P < 0.05); the functional groups had no significant influence on all traits.