Figure 2
From: Mammalian ranges are experiencing erosion of natural darkness
The magnitude and trend of conflict between ALAN and mammals.
(a) The difference in the spread of light between the first and last four years for all species, (b) A comparison of the average intensity of light between the first and last four years for affected species (those that have a mean DN higher than 0), (c) The strength of trend in ALAN over the 21 year study period by tau value (Mann-Kendall trend test). Grey shaded areas indicate significantly negative and positive results (p < 0.05) respectively, for affected species.
