Table 1.
Results from mixed models of the (A) species (n = 179) and (B) taxa (n = 93) richness of botanic gardens as a function of town population size (thousand individuals), country Gross Domestic Product per person ($, Purchasing Power Parity), species richness of the country flora (n), garden area (km2), age (years, as of 2006) and absolute latitude
| R2 | y = | log(pop) | log(GDP) | log(flora) | log(area) | log(age) | Abs. lat. |
|---|---|---|---|---|---|---|---|
| (A) Species | |||||||
| 0·48 | 0·93 | 0·15 | 0·48 | −0·14 | 0·25 | 0·27 | 0·004 |
| s.e. = | 0·58 | 0·05 | 0·12 | 0·10 | 0·05 | 0·06 | 0·004 |
| P = | 0·006 | 0·001 | 0·17 | 0·001 | 0·001 | 0·27 | |
| part. R2 | 0·05 | 0·11 | 0·03 | 0·10 | 0·10 | 0·02 | |
| (B) Taxa | |||||||
| 0·46 | 2·07 | 0·13 | 0·57 | −0·26 | 0·28 | 0·08 | −0·005 |
| s.e. = | 0·72 | 0·05 | 0·11 | 0·10 | 0·05 | 0·07 | 0·004 |
| P = | 0·01 | 0·001 | 0·005 | 0·001 | 0·28 | 0·19 | |
| part. R2 | 0·08 | 0·26 | 0·09 | 0·18 | 0·01 | 0·02 | |
s.e., Standard error of the parameter estimate.
Significant values are highlighted in bold.