Fig. 3: Relationships between biodiversity change and human population change at the study sites.

The colour coding of the trends represents the statistical results of population demography based on Fig. 1, with red indicating increasing trends, blue indicating decreasing trends and grey indicating no significant trend. Essentially, the graph shows the changes in biodiversity for the study sites, categorized according to increasing trends, decreasing trends or no significant trend in human population. The solid lines are regression curves based on coefficients estimated from the best models.