Table 1 Summary statistics for the best models describing fungal diversity and composition along the Tietê River.

Response	Predictor	Estimate	SE	z/t-value	P
Diversity	Dissolved Fe	−0.3183	0.1542	2065	0.04*
	pH	0.6360	0.1562	4072	<0.001***
	Total P	−0.2935	0.1516	1936	0.05
	Total Al	−0.2961	0.1853	1598	0.11
	Total Organic C	−0.2379	0.1722	1382	0.17
	Seasonality (rain)	0.5274	0.3160	1669	0.09
	Total Fe	0.1331	0.1462	911	0.36
NMDS1	B.O.D	0.23154	0.05465	4237	0.002**
	pH	0.40424	0.04795	8431	<0.001***
	Total Al	−0.27600	0.05629	−4903	<0.001***
	Total Fe	0.33301	0.05057	6585	<0.001***
NMDS2	Amoniacal N	0.31497	0.18613	1692	0.09
	D.O	−0.28334	0.08388	3378	<0.001***
	Nitrate	0.46481	0.10547	4407	<0.001***
	Total Organic C	−0.29615	0.07715	3839	<0.001***
	Seasonality (rain)	0.47151	0.12695	3714	<0.001***
	Conductivity	0.16575	0.11744	1411	0.16
	Total Fe	0.24132	0.06558	3680	<0.001***
	Temperature	0.10733	0.06449	1664	0.10

Model-averaged coefficients based on the suit of best models (ΔAIC ≤ 2) and dry season used as reference level.

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