Table 2.
The mean and standard deviation of all confounding factors, the treatment log TN, and the response invertebrate richness within all streams and within the three strata
| Variable | Means ± standard deviation | |||
|---|---|---|---|---|
| All streams | Forested Mountains | Great Plains | North American Deserts | |
| Log(TN) | 2.33 ± 0.51 | 2.04 ± 0.35 | 2.95 ± 0.36 | 2.64 ± 0.38 |
| Invertebrate richness | 48.30 ± 15.15 | 55.19 ± 12.58 | 33.72 ± 11.76 | 40.03 ± 11.49 |
| ELEV | 1252.06 ± 722.10 | 1455.84 ± 688.03 | 783.80 ± 379.71 | 1701.97 ± 501.16 |
| Longitude | − 114.04 ± 7.55 | − 166.85 ± 5.48 | − 102.06 ± 3.16 | − 113.58 ± 4.06 |
| Log(PRECIP) | − 0.31 ± 0.56 | − 0.07 ± 0.49 | − 0.81 ± 0.18 | − 0.74 ± 0.27 |
| Log(AREA) | 4.07 ± 2.34 | 3.09 ± 1.68 | 6.77 ± 1.73 | 4.53 ± 2.56 |
| Log(CL) | 4.35 ± 1.85 | 3.05 ± 1.20 | 6.04 ± 1.21 | 5.28 ± 1.73 |
| Log(HCO3) | 7.34 ± 1.12 | 6.76 ± 1.06 | 8.44 ± 0.55 | 7.75 ± 0.77 |
| Log(SO4) | 5.48 ± 2.42 | 3.97 ± 1.52 | 8.70 ± 1.61 | 6.42 ± 1.90 |
| SED | 35.45 ± 30.35 | 1.82 ± 8.95 | 12.79 ± 32.54 | 4.85 ± 20.45 |
| STRMTEMP | 15.16 ± 5.55 | 12.39 ± 4.19 | 20.58 ± 5.02 | 16.08 ± 5.70 |
| Percent.AGT | 8.10 ± 21.28 | 0.58 ± 5.59 | 38.72 ± 33.44 | 2.90 ± 9.58 |
| Percent.URB | 0.17 ± 0.47 | 0.06 ± 0.22 | 0.33 ± 0.44 | 0.13 ± 0.47 |
| Percent.Canopy | 0.37 ± 0.38 | 0.23 ± 0.31 | 0.72 ± 0.32 | 0.59 ± 0.39 |
| Riparian.Disturb | 0.56 ± 0.64 | 0.36 ± 0.57 | 1.10 ± 0.53 | 1.03 ± 0.56 |