Figure 4 Average complexities of SCNs over N addition rate and year are given. The colour shade of each square represents the average complexity (also labelled by white number) of four kinds of networks (mowing and no mowing, high and low N addition frequency) under different N addition rates in each year. The lighter the colour, the higher the complexity. The NaN indicates that the plots were dominated completely by environmental factors.

Table Legends:

Table 1 :The species contained in the SCNs were ranked according to their total biomass. The average biomass of individuals, frequencies of occurrence in the minimal loops, and average BC in TCN and ICN are also given in this table. The differently coloured backgrounds mark the superior, sub-superior and inferior species.