Protist communities are more sensitive to nitrogen fertilization than other microorganisms in diverse agricultural soils

Table 4 Topological indices of each network in Fig. 3

	All soil types			Black soil			Fluvo-aquic soil			Red soil
	Control	N	NS	Control	N	NS	Control	N	NS	Control	N	NS
Clustering coefficient	0.339	0.349	0.344	0.382	0.339	0.432	0.415	0.410	0.496	0.361	0.371	0.427
Network density	0.043	0.040	0.041	0.011	0.014	0.018	0.009	0.020	0.030	0.009	0.009	0.022
Number of nodes	124	121	110	343	313	254	368	354	328	409	365	328
Number of edges	325	289	248	648	668	571	637	1236	1635	754	604	1178
Protist nodes (%)	8.06	5.79	4.55	21.87	19.81	16.14	10.05	5.65	6.10	17.11	13.15	14.33
Fungal nodes (%)	21.77	21.49	12.73	19.24	22.04	19.69	18.47	17.80	17.68	20.54	21.92	20.12
Bacterial nodes (%)	70.16	72.73	82.73	58.89	58.15	64.17	71.47	76.55	76.22	62.35	64.93	65.55
Edges linking protist to bacteria (%)	2.77	0	0.40	16.82	17.07	12.78	7.85	4.05	0.43	16.45	12.42	4.24
Edges linking protist to fungi (%)	0.31	0.35	0	6.48	6.74	8.06	3.14	0.49	0.24	6.90	5.46	2.29
Edges linking bacteria to fungi (%)	15.69	14.53	13.31	13.12	17.07	11.56	21.19	10.28	4.46	16.98	24.34	14.35

Abbreviation: Control no nitrogen addition, N nitrogen addition, NS nitrogen + straw addition, Protist nodes (%) percentage of nodes assigned to protist taxa, Edges linking protist to bacteria (%) percentage of edges linking protist taxa to bacterial taxa

ISSN: 2049-2618