Table 2. Multilevel model results.
| Species abundance | Species presence | Shannon diversity | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model component | Parameter estimate | Standard error | Confidence interval | Parameter estimate | Standard error | Confidence interval | Parameter estimate | Standard error | Confidence interval | |
| Fixed terms | (Intercept) | −0.50 | 0.35 | −1.19, 0.19 | −1.62 *** | 0.41 | −2.42, −0.82 | 0.80 *** | 0.03 | 0.75, 0.85 |
| Year | 0.12+ | 0.07 | −0.01, 0.26 | −0.09 | 0.12 | −0.32, 0.15 | −0.04 | 0.03 | −0.1, 0.03 | |
| Management | −0.40 * | 0.17 | −0.73, 0.07 | −0.55 * | 0.22 | −0.98, −0.11 | −0.01 ** | 0.03 | −0.16, −0.03 | |
| Year × Management | 0.07 | 0.1 | −0.12, 0.27 | 0.226 | 0.17 | −0.11, 0.56 | 0.04 | 0.04 | −0.05, 0.12 | |
| Random terms | SD (Intercept plot/site) | 0.23 | 0.29 | 0.03 | ||||||
| SD (Intercept site) | 0.23 | 0.18 | 0.01 | |||||||
| SD (Intercept species) | 1.84 | 2.15 | ||||||||
| SD (management slope species) | 0.37 | 0.52 | 0.13 | |||||||
| Dispersion | (Intercept) | 11.04 | 9.95, 12.26 | |||||||
| Num.Obs. | 5,100 | 5,100 | 150 | |||||||
| AIC | 11,231.5 | 654,395 | −156.3 | |||||||
Notes:
The table shows the parameter estimates, their standard errors and confidence intervals of our models for species abundance, presence and Shannon diversity (for the full model without a random slope for year).
***
Marks p < 0.001.
**
Marks p < 0.01.
*
Indicates p < 0.05.
+
Indicates p < 0.1.
The negative parameter estimate for treatment implies a lower abundance in mowed areas. The standard deviations for each random term are also given, as well as the model AICs. Significant results are highlighted in bold.