Fig 1.
Scattergram (decimal logarithm) of the measure of the existing (N*(t, G)) versus the fundamental (NF) niches for 105 species.
The units for NF and N*(t, G) are in °C. The straight line is the line of Existing = Fundamental. The units of the existing niche can be transformed to units of area potentially suitable for each species. The distance between a point and the line is a measure of how much potential for evolving wider tolerance ranges a species has (see text).
Fig 2.
Proportion of GBIF points inside the NF for a common scale of fundamental niches (bars) and smooth histogram of the distribution of observed standardized temperatures.
The red bars show the limits of the 105 NF in the common scale.
Fig 3.
Scattergram (decimal logarithm) of the measure of NR(t, G) vs. N*(t, G) for 92 species with more than five occurrences.
The units for NR(t, G) and N*(t, G) are in °C. The straight line is the line of Realized = Existing. The distance between a point and the line is a measure of how much favorable space is not being used by a species, maybe due to interactions, dispersal limitations or other such factors (see text).
Fig 4.
Smooth histograms of the decimal logarithm of values of a null model of fundamental niche (grey), the 105 values of fundamental (red), 105 existing (green) and 92 realized (blue).