Table 3 Data transformation used, random effect used, and P values from a two factor (site type and student activity period) linear mixed effect model analysis of macroinvertebrate community response variables in runs within two sites in Alum Creek, Ohio from February 2013 to January 2014. Bolded P values are those that had a significant effect (P < 0.05) within the linear mixed effect model analysis.
From: Impact of student-induced disturbance on stream macroinvertebrates differs among habitat types
Response Variable | Transformation | Random effect | ST | SA | ST x SA |
|---|---|---|---|---|---|
Abundance | log | ~1|Month | 0.009 | 0.173 | 0.415 |
Taxa richness | log | ~1|Plot | <0.001 | 0.001 | 0.147 |
Shannon diversity index | log | ~1|Month/Site/Plot | 0.005 | 0.421 | 0.271 |
Evenness | log | ~1|Month | 0.007 | 0.031 | 0.895 |
Percent EPT | as | ~1|Month | 0.002 | 0.717 | 0.156 |
Percent Chironomidae | as | ~1|Month | <0.001 | 0.829 | 0.085 |
Clinger taxa richness | log | ~1|Plot | <0.001 | <0.001 | 0.172 |
Clinger abundance | log | ~1|Month/Site/Plot | 0.002 | 0.055 | 0.791 |
Trichoptera taxa richness | log | ~1|Plot | 0.034 | 0.098 | 0.180 |
Trichoptera abundance | log | ~1|Plot | 0.001 | 0.704 | 0.203 |
NMS axis 1 | log1.5 | ~1|Month | <0.001 | 0.921 | 0.243 |
NMS axis 2 | log1.5 | ~1|Month/Site/Plot | 0.048 | 0.762 | 0.662 |
