Table 2.
Landscape, local and regional effects on grassland plant specialist richness
| Variable | Para.Est. | Lower | Upper | t | p |
|---|---|---|---|---|---|
| Intercept | 2.028 | 1.988 | 2.067 | 100.526 | <0.001 |
| Landscape | |||||
| Present landscape open | 0.024 | 0.009 | 0.038 | 3.220 | 0.001 |
| Past landscape heterogeneity | −0.037 | −0.049 | −0.024 | −5.692 | <0.001 |
| Past landscape arable | −0.080 | −0.094 | −0.066 | −11.366 | <0.001 |
| Local | |||||
| Grassland area (log) | 0.178 | 0.162 | 0.195 | 20.863 | <0.001 |
| Grassland heterogeneity | 0.220 | 0.206 | 0.234 | 30.769 | <0.001 |
| Area Fennoscandian species-rich dry-mesic lowland grassland (log) | 0.254 | 0.241 | 0.267 | 38.445 | <0.001 |
| Area semi-natural dry grassland and shrubland on calcareous substrates (log) | 0.116 | 0.105 | 0.128 | 19.451 | <0.001 |
| Grassland open habitat | 0.069 | 0.055 | 0.082 | 9.730 | <0.001 |
| Grassland improvement | −0.111 | −0.125 | −0.096 | −14.958 | <0.001 |
| Region | |||||
| Parameter compared to baseline factor Kronoberg county, which had the greatest change (reduction) in open cover in the study region | Parameter estimate | ||||
|
Mean = −0.174, Max = 0.109 (Uppsala), Min = −0.526 (Blekinge) p All <0.001, except Värmland, Kalmar, Västra Götaland and Gotland (n/s) |
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Full generalised linear model explaining grassland specialist richness in 23,398 Swedish semi-natural grasslands including both landscape and local predictors along with region (county), including 95% confidence intervals. Full model output including values for all regions is available as Supplementary Table 2