Table 1.
Results of ENFA using all the variables, showing the contributions of each variable to the marginality/specificity factors of each species. Contributions to the marginality factor higher than 0·2 are in bold. The four variables with higher scores for the three species, which were also identified by GLMs and used in subsequent analyses, are indicated with an asterisk*
| ENFA results | S. boivinii | S. genistoides | S. spectabilis |
|---|---|---|---|
| Marginality | 1·587 | 1·757 | 1·936 |
| Specialization | 7·822 | 3·991 | 9·257 |
| Marginality factor (% explained) | 40 | 32 | 69 |
| First specialization factor (% explained) | 50 | 33 | 15 |
| Environmental variables | |||
| Mean temperature of coldest quarter* | 0·47/175·8 | 0·47/55·34 | 0·48/452·28 |
| Annual temperature range* | −0·36/98·52 | −0·40/73·59 | −0·36/330·34 |
| Isothermality* | 0·37/85·34 | 0·34/28·19 | 0·41/302·94 |
| Seasonality of precipitation* | 0·59/255·03 | 0·43/83·18 | 0·44/443·95 |
| Mean temperature of warmest quarter | – | 0·14/72·17 | – |
| Mean temperature of wettest quarter | 0·13/77·10 | 0·16/29·26 | 0·19/245·62 |
| Hydric balance | −0·14/204·6 | – | −0·22/189·7 |
| Altitude range | – | −0·32/36·82 | −0·33/276·66 |
| Average monthly radiation | – | 0·05/54·27 | 0·04/186·33 |
| Precipitation in coldest quarter | 0·29/286·6 | 0·23/21·52 | – |
| Holocene and Pleistocene sedimentary substrates | – | 0·18/16·33 | 0·11/89·80 |
| Metamorphic and sedimentary substrates | – | −0·22/18·70 | −0·21/166·47 |
| Miocene and Pliocene sedimentary substrates | 0·15/36·72 | 0·11/12·59 | 0·11/93·92 |
| Plutonic substrates | −0·11/30·12 | – | −0·13/110·55 |