Table 1.

Results of the best fit selected models (multiple regressions) explaining the standardised mean pairwise distance index (SES-MPD) and the standardised mean nearest taxon distance index (SES-MNTD) variation.

Model	Parameter	Estimate	Std. Error	t value	P-value
SES-MPD	(Intercept)	−4.4211	0.7402	−5.97	<0.001
(R2 = 0.12)	pH	0.2398	0.0846	2.84	0.0047
	TOC	0.501	0.1255	3.99	<0.001
	UCA	0.3314	0.0439	7.55	<0.001
SES-MNTD	(Intercept)	−2.1891	0.1428	−15.33	<0.001
(R2 = 0.13)	Nutrients	0.3105	0.0347	8.95	<0.001
	UCA	0.1046	0.0351	2.98	0.003

Models were selected by minimum AICc among all possible combinations of predictors. TOC: total organic carbon. UCA: upstream catchment area.