Table 1.
Pearson correlations (r) between 0.2° palm species richness on Madagascar and its potential drivers, with significance computed using Dutilleul's method [51] to estimate the number of degrees of freedom (accounting for spatial autocorrelation). (n = 1387 0.2° cells. The asterisks indicate significant levels. *p < 0.05; **p < 0.01; ***p < 0.001; n.s., not significant. Total species richness is based on the parsimonious complex model (see §2). PRECLGM, LGM precipitation anomaly; TEMPLGM, LGM temperature anomaly; PREC, annual precipitation; TEMP, annual mean temperature; PSEA, precipitation seasonality; AET, actual evapotranspiration; PET, potential evapotranspiration; TOPO, topographic range; VEG, vegetation-type heterogeneity; GEOL, geological heterogeneity; TOPO, topographic range; HII, human influence; HPH, historical population density.)
| variable | richnesstotalr | richnessrare r |
|---|---|---|
| PRECLGM | 0.809*** | 0.260*** |
| TEMPLGM | −0.317 (n.s.) | −0.118 (n.s.) |
| PREC | 0.711** | 0.249*** |
| TEMP | −0.265 (n.s.) | −0.074 (n.s.) |
| PSEA | −0.767*** | −0.272*** |
| AET | 0.821*** | 0.257*** |
| PET | 0.100 (n.s.) | 0.027 (n.s.) |
| TOPO | 0.259* | 0.123* |
| VEG | 0.089 (n.s.) | 0.011 (n.s.) |
| GEOL | −0.018 (n.s.) | −0.024 (n.s.) |
| HII | 0.357* | 0.069 (n.s.) |
| HPH | 0.264 (n.s.) | 0.058 (n.s.) |