"Most locations (59%, n = 37) were sampled in only one year, 20 locations in two years, five locations in three years, and one in four years" also "Our data do not represent longitudinal records at single sites, suitable to derive location specific trends"
Looking at Table 1 it seems the sampling was very irregular and sporadic. I'm not sure how you can draw any conclusions from this! And in Fig 2, is it my eyes or does the black trend line appear to be right at the top of the blue bars?
Biting the hand that feeds IT
