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Table 3

Correlations of environmental variables with the NMDS ordinations of macroinvertebrates (D and N separately) and the significance of the correlation based on the envfit function (9999 permutations). The goodness-of-fit statistic is the squared correlation coefficient (r2) (mean_diam = mean riverbed substrate diameter).

Daytime (D) Nighttime (N)

Variables r 2 p-value r 2 p-value
Velocity 0.578 0.0001 *** 0.457 0.0002 ***

Depth 0.023 0.6831 0.128 0.1129

CPOM 0.194 0.0305 * 0.289 0.0048 **

mean_diam 0.297 0.0033 ** 0.075 0.2859

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