Table 1.
Mean values (standard deviation) of the 19 bioclimatic variables from the WorldClim dataset and loads (coordinates) for PCA axes 1 and 2 showing the specific contribution of each of the bioclimatic variables used in the environmental analysis of four lowland sites in Costa Rica
| Bioclimatic variables | Punta Banco | Rincon de Osa | Sarapiqui | Siquirres | PC1 | PC2 |
|---|---|---|---|---|---|---|
| BIO1 = Annual Mean Temperature | 25.5 (0.7) | 25.6 (0.6) | 25.4 (0.7) | 24.4 (1.1) | 0.1 | −0.1 |
| BIO2 = Mean Diurnal Range | 10.1 (0.7) | 11.0 (0.2) | 9.0 (0.0) | 9.0 (0.0) | 0.0 | −0.4 |
| BIO3 = Isothermality | 75.4 (0.9) | 76.6 (0.7) | 77.3 (0.7) | 79.4 (0.7) | −0.1 | 0.4 |
| BIO4 = Temperature Seasonality | 77.9 (5.5) | 78.0 (1.8) | 73.3 (5.6) | 76.1 (2.5) | 0.0 | −0.6 |
| BIO5 = Max Temperature of Warmest Month | 32.8 (0.8) | 33.2 (0.7) | 31.6 (0.7) | 30.4 (1.1) | 0.1 | −0.5 |
| BIO6 = Min Temperature of Coldest Month | 19.2 (0.9) | 18.9 (0.9) | 19.8 (0.7) | 19.0 (1.2) | 0.1 | 0.1 |
| BIO7 = Temperature Annual Range | 13.8 (1.0) | 14.2 (0.4) | 12.0 (0.2) | 11.2 (0.4) | 0.0 | −0.6 |
| BIO8 = Mean Temperature of Wettest Quarter | 25.0 (0.7) | 25.1 (0.7) | 25.3 (0.9) | 24.2 (1.2) | 0.1 | −0.1 |
| BIO9 = Mean Temperature of Driest Quarter | 25.8 (0.6) | 25.8 (0.7) | 25.9 (0.7) | 25.1 (1.2) | 0.1 | −0.1 |
| BIO10 = Mean Temperature of Warmest Quarter | 26.6 (0.8) | 26.7 (0.8) | 26.4 (0.8) | 25.5 (1.1) | 0.1 | −0.2 |
| BIO11 = Mean Temperature of Coldest Quarter | 24.7 (0.8) | 24.8 (0.8) | 24.6 (0.6) | 23.6 (1.1) | 0.1 | −0.1 |
| BIO12 = Annual Precipitationa | 3,112.0 (134.0) | 3,976.4 (430.3) | 4,085.4 (185.5) | 3,784.4 (245.8) | 128.1 | 31.4 |
| BIO13 = Precipitation of Wettest Montha | 586.3 (47.2) | 712.7 (51.4) | 460.4 (19.1) | 440.1 (23.5) | 13.8 | −49.9 |
| BIO14 = Precipitation of Driest Month | 54.0 (14.8) | 60.7 (19.5) | 163.6 (13.4) | 182.1 (18.7) | 3.6 | 24.8 |
| BIO15 = Precipitation Seasonality | 64.5 (6.4) | 62.8 (4.9) | 30.0 (1.5) | 27.2 (2.1) | −0.7 | −7.4 |
| BIO16 = Precipitation of Wettest Quartera | 1,351.0 (87.7) | 1,719.3 (130.8) | 1,277.3 (56.9) | 1,173.9 (65.2) | 41.7 | −88.5 |
| BIO17 = Precipitation of Driest Quartera | 176.8 (49.1) | 237.4 (65.2) | 589.9 (40.9) | 625.1 (53.4) | 14.8 | 82.8 |
| BIO18 = Precipitation of Warmest Quarter | 528.5 (27.6) | 707.5 (82.4) | 724.5 (41.9) | 772.7 (72.4) | 21.7 | 19.6 |
| BIO19 = Precipitation of Coldest Quartera | 1,071.8 (132.0) | 1,348.7 (152.2) | 1,163.9 (71.9) | 1,089.1 (60.4) | 38.4 | −36.0 |
Temperature variables are measured in Celsius (environmental variables 1–11) and precipitation variables in mm (environmental variables 12–19).
a
Bioclimatic variables with higher contribution.