Table 3 Simple and partial Mantel tests for the correlations between environmental factors and community variability.

From: Marked seasonality and high spatial variation in estuarine ciliates are driven by exchanges between the ‘abundant’ and ‘intermediate’ biospheres

	Simple Mantel Test						Control for	Partial Mantel Test
	Total		Cool		Warm			Total		Cool		Warm
	r	P	r	P	r	P		r	P	r	P	r	P
Environmental factors
Salinity	0.658	0.0001 ^*	0.781	0.0001 ^*	0.607	0.0001 ^*	Temperature	0.521	0.0001 ^*	0.514	0.0001 ^*	0.347	0.0001 ^*
							Chl a	0.644	0.0001 ^*	0.638	0.0001 ^*	0.554	0.0001 ^*
							Bacteria	0.633	0.0001 ^*	0.580	0.0001 ^*	0.511	0.0001 ^*
Temperature	0.189	0.0001 ^*	0.734	0.0001 ^*	0.531	0.0001 ^*	Salinity	0.127	0.0100 ^*	0.362	0.0004 ^*	−0.001	0.4945
Depth	−0.009	0.5306	−0.024	0.5509	−0.025	0.6250	Salinity	−0.045	0.7932	−0.105	0.9005	−0.038	0.7132
Chl a	0.259	0.0001 ^*	0.602	0.0001 ^*	0.314	0.0001 ^*	Salinity	0.193	0.0008 ^*	0.172	0.0137	0.102	0.0399
Bacteria	0.259	0.0003 ^*	0.650	0.0001 ^*	0.386	0.0001 ^*	Salinity	0.118	0.0140	0.138	0.0372	−0.066	0.9268
Accessory pigments
Chlorophyllide a	0.393	0.0001 ^*	0.530	0.0001 ^*	0.447	0.0001 ^*	Salinity	0.142	0.0028 ^*	0.082	0.1623	0.198	0.0017 ^*
Chlorophyll c2	0.215	0.0001 ^*	0.344	0.0002 ^*	0.241	0.0003 ^*	Salinity	0.134	0.0046 ^*	0.053	0.2372	0.195	0.0027 ^*
Fucoxanthin	0.280	0.0001 ^*	0.466	0.0001 ^*	0.317	0.0001 ^*	Salinity	0.174	0.0005 ^*	0.067	0.1249	0.232	0.0010 ^*
Neoxanthin	0.422	0.0001 ^*	0.372	0.0002 ^*	0.551	0.0001 ^*	Salinity	0.171	0.0008 ^*	0.224	0.0064 ^*	0.342	0.0001 ^*
Violaxathin	0.477	0.0001 ^*	0.528	0.0001 ^*	0.456	0.0001 ^*	Salinity	0.310	0.0001 ^*	0.078	0.1551	0.371	0.0001 ^*
Diadinoxanthin	0.331	0.0001 ^*	0.340	0.0003 ^*	0.376	0.0002 ^*	Salinity	0.168	0.0014 ^*	0.170	0.0188	0.244	0.0004 ^*
Alloxathin	0.403	0.0001 ^*	0.524	0.0001 ^*	0.415	0.0001 ^*	Salinity	0.170	0.0005 ^*	0.052	0.2413	0.138	0.0173
Zeaxanthin	0.387	0.0001 ^*	0.665	0.0001 ^*	0.284	0.0001 ^*	Salinity	0.043	0.1430	0.200	0.0191	0.084	0.0583
Lutein	0.578	0.0001 ^*	0.687	0.0001 ^*	0.597	0.0001 ^*	Salinity	0.164	0.0005 ^*	0.128	0.0748	0.261	0.0004 ^*
Chlorophyll b	0.481	0.0001 ^*	0.621	0.0001 ^*	0.440	0.0001 ^*	Salinity	0.227	0.0002 ^*	0.025	0.3422	0.282	0.0003 ^*
Phytoplankton ratio
Microphytoplankton ratio	0.160	0.0004 ^*	0.217	0.0109	0.122	0.0204	Salinity	0.137	0.0013 ^*	0.081	0.1672	0.117	0.0255
Nanophytoplankton ratio	0.0277	0.2580	0.1026	0.1220	0.0088	0.0004 ^*	Salinity	−0.023	0.6690	−0.007	0.4873	−0.021	0.6205
Picophytoplankton ratio	0.1857	0.0009 ^*	0.3002	0.0027	0.1486	0.0125	Salinity	−0.056	0.8780	−0.010	0.4983	0.014	0.3756

Only top abundant accessory pigments were included in the analysis. Contrasting response pattern between cool and warm groups were shaded in grey. Definitions of ratios used as proxies for phytoplankton functional groups followed Vidussi et al. (2001) and Uitz et al. (2006). ^* indicates P value is still significant after Bonferroni correction.

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Table 3 Simple and partial Mantel tests for the correlations between environmental factors and community variability.

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