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All issues No 424 (2023) Knowl. Manag. Aquat. Ecosyst., 424 (2023) 18 Full HTML

Table 1

Community-level weighted means (CWM) of trait values for the two sampling stations based on the functional traits and modalities considered in this study. Significant (p < 0.05) values are in bold.

Trait Trait modality CWM Downstream station (mean ± SD) CWM Upstream station (mean ± SD) p-value
Respiration Tegument 0.448 ± 0.026 0.390 ± 0.074 0.047
Gill 0.554 ± 0.029 0.597 ± 0.070 0.078
Plastron 0.003 ± 0.003 0.005 ± 0.007 0.219
Spiracle 0.004 ± 0.004 0.008 ± 0.011 0.375
Locomotion and substrate relation Flier 0.001 ± 0.001 0.002 ± 0.003 0.687
Surface swimmer 0.014 ± 0.018 0.024 ± 0.021 0.078
Water swimmer 0.154 ± 0.082 0.181 ± 0.098 0.219
Crawler 0.562 ± 0.107 0.597 ± 0.089 0.078
Burrower 0.127 ± 0.029 0.111 ± 0.029 0.156
Interstitial 0.063 ± 0.037 0.043 ± 0.018 0.109
Temporary attached 0.074 ± 0.033 0.040 ± 0.024 0.031
Permanent attached 0.001 ± 0.001 0.0005 ± 0.0005 0.078
Current velocity (preferendum) Null 0.307 ± 0.112 0.303 ± 0.143 0.998
Slow 0.450 ± 0.078 0.534 ± 0.098 0.016
Medium 0.143 ± 0.037 0.095 ± 0.039 0.031
Fast 0.099 ± 0.036 0.067 ± 0.038 0.031
Feeding habits Absorber 0.002 ± 0.001 0.003 ± 0.003 0.999
Deposit-feeder 0.119 ± 0.062 0.076 ± 0.035 0.031
Shredder 0.265 ± 0.135 0.349 ± 0.179 0.078
Scraper 0.232 ± 0.083 0.215 ± 0.084 0.297
Filter-feeder 0.212 ± 0.089 0.197 ± 0.094 0.296
Piercer 0.004 ± 0.004 0.011 ± 0.013 0.375
Predator 0.147 ± 0.056 0.136 ± 0.070 0.375
Parasite 0.017 ± 0.008 0.013 ± 0.008 0.015

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