Fig. 3: Mean mammal geographic range size increased from the 15,000–10,000 ybp time bin onward but only became significantly larger than null expectations in the modern time bin when small mammals (<1 kg) are included (sample sizes in Source Data).
From: Late quaternary biotic homogenization of North American mammalian faunas
Mean range size for mammals larger than 1 kg were significantly larger than null expectations by the 5,000-500 ybp time bin. Neither are associated with increases in range occupancy. A mean geographic range size ± standard error of the mean and B mean occupancy (proportion of 1˚ by 1˚ grid cells occupied) ± standard deviation. Gray ribbons show the mean of the null model runs (sites shuffled among time bins) with 95% confidence intervals.
