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Figure 1: Patterns between sample size and latitude, onset, and
termination for population (species-region) subsets of ELE13739 data. In
all panels, separate lines/colors are different populations. Panel (a)
shows the variation in data density across latitudes
[log(n)~lat.band:population + (1|population)
has marginal r2 of 0.35 and slope is significantly
positive for 14 species.] Panels (b) and (c) show ELE13739 onset and
termination DOYs respectively, according to data density [onset
marginal r2=0.03 (19 negative, 62 non-significant
population-specific coefficients); termination marginal
r2=0.02 (14 positive, 67 non-significant
population-specific coefficients).]