Table 2. Fractions of variation partitioning for all taxa and each guild.

	a	b	c	d	e	f	g	h	i	j	k	l	m	n	o	p
All	0.02	0.01	—	0.09**	—	0.003	0.01	0.12	0.03	0.03	0.17	—	0.06	0.1	0.04	0.35
High	0.05**	—	0.06***	—	—	—	0.09	—	—	—	—	—	—	—	—	0.80
Low	0.02■	0.07**	—	0.13***	—	—	0.004	0.11	0.07	0.03	0.14	0.005	0.04	0.07	0.08	0.25
Motile	0.05*															0.95

Environmental model, Geographical model, Topographic model and Directional spatial model were expressed as Env, PCNM_G, PCNM_T and AEM. [a] unique environmental fraction; [b] unique PCNM_G fraction; [c] unique PCNM_T fraction; [d] unique AEM fraction; [e] shared fraction of Env and PCNM_G; [f] shared fraction of PCNM_G and PCNM_T; [g] shared fraction of Env and PCNM_T; [h] shared fraction of Env and AEM; [i] shared fraction of PCNM_G and AEM; [j] shared fraction of PCNM_T and AEM; [k] shared fraction of Env, PCNM_G and AEM; [l] shared fraction of Env, PCNM_G and PCNM_T; [m] shared fraction of PCNM_G, PCNM_T and AEM; [n] shared fraction of Env, PCNM_T and AEM; [o] shared fraction of the four models; [p] unexplained fraction. High, low and motile represented the high-profile, low-profile and motile guild, respectively. Values <0 and no data were shown as —. Significance of each testable fraction (a–d) was expressed as ^■P < 0.1, ^*P < 0.05, ^**P < 0.01, ^***P < 0.001.