Fig. 5From: Is it becoming harder to secure reviewers for peer review? A test with data from five ecology journals Left column: comparison of the number of reviewed submissions, and the number of unique reviewers invited for four ecology journals, 2003 to 2010. Data from Petchey et al. (2014b). Right column: comparison of the average number of review invitations per unique reviewer for four ecology journals, 2003 to 2010. Error bars indicate 95 % confidence intervals. Data from Petchey et al. (2014b)Back to article page