Table 1.
Effects on community stability | |||
---|---|---|---|
Diversity | |||
Total effects | 0.270 | 0.264 | 0.487 |
Diversity effects | 0.116 | 0.264 | 0.180 |
Phylogenetic diversity effects | 0.154 | NS | 0.307 |
Effects via population stability | −0.132 | NS | 0.143 |
Effects via population asynchrony | 0.402 | 0.264 | 0.344 |
Habitat degradation | |||
Total effects | −0.20 | −0.291 | −0.134 |
Urban effects | 0.004 | −0.043 | −0.247 |
Agricultural intensity effects | −0.204 | −0.248 | 0.112 |
Effects via diversity and phylogenetic diversity | −0.026 | −0.092 | 0.013 |
Effects via population stability | −0.175 | −0.198 | −0.260 |
Effects via population asynchrony | NS | NS | 0.112 |
The strength of each path is calculated from the standardized coefficients of the structural equation models, multiplying coefficients along a path and summing the results over the different paths. Total effects refer to the sum of the effects by which species richness and phylogenetic diversity loss, or urban gradient and agricultural intensity gradient, affect community stability. Effects via a variable are the sum of the effects of diversity loss/habitat degradation on community stability that are channeled by a direct effect on this variable. NS stands for nonsignificant effects.