Table 1.
Overview of bioclimatic definitions (Murphy and Lugo, Food and Agriculture Organization of the United Nations [FAO], DryFlor, Aridity Index) of the tropical dry forest biome.
Fig 1.
Distribution of 540 tropical dry forest plots and the World Wildlife Fund’s tropical and subtropical dry broadleaf forest ecoregion.
Table 2.
Estimate of tropical dry forest biome area (km2), globally and in different regions, based on four bioclimatic definitions (Murphy and Lugo, Food and Agriculture Organization of the United Nations [FAO], DryFlor, Aridity Index) using two projections.
Fig 2.
Global distribution of tropical dry forest biome using WorldClim.
Based on (a) aridity index, (b) Murphy and Lugo, (c) Food and Agriculture Organization of the United Nations (FAO), (d) DryFlor bioclimatic definitions using WorldClim and (e) overlap of all four bioclimatic definitions (aridity index, Murphy and Lugo, FAO, and DryFlor).
Fig 3.
Global distribution of tropical dry forest biome using CHELSA.
Based on (a) aridity index (b) Murphy and Lugo, (b) Food and Agriculture Organization of the United Nations (FAO), (c) DryFlor bioclimatic definitions using CHELSA and (e) overlap of all four bioclimatic definitions (aridity index, Murphy and Lugo, FAO, and DryFlor).
Table 3.
Extent of World Wildlife Fund’s Tropical and Subtropical Dry Broadleaf Forest (TSDBF) ecoregion (km2) and overlap (%) with bioclimatic definitions (Murphy and Lugo, Food and Agriculture Organization of the United Nations [FAO], DryFlor, Aridity Index).
Table 4.
Number of field plots and percent agreement with field plots (%) and World Wildlife Fund’s Tropical and Subtropical Dry Broadleaf Forest (TSDBF) ecoregions and four bioclimatic definitions (Murphy and Lugo, Food and Agriculture Organization of the United Nations [FAO], DryFlor, Aridity Index).
Fig 4.
Estimates of the percentage of true positives and biome extent using bootstrapping with 95% confidence intervals.
Points represent the average values and segments the lower and upper bounds of the intervals (i.e. the quantiles 0.025 and 0.975, respectively) using 1,000 iterations. Dotted black lines represent significant (p < = 0.05) linear relationships between the estimate of tropical dry forest biome area and the percentage of true positive.
Fig 5.
Forest cover and change from FAO bioclimatic definition, CHELSA climate data set, and closed canopy cover.
(a) Global, (b) Africa, (c) North and Central America, (d) South America, (e) South Asia, and (f) Southeast Asia & Asia Pacific.
Table 5.
Comparisons of best methods for estimating closed canopy (≥ 40% closed canopy) tropical dry forest extent and forest cover (km2) in 2000 and 2020 between 30˚N and 30˚S.