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. Author manuscript; available in PMC: 2017 Sep 13.
Published in final edited form as: Biol Invasions. 2017 Apr;19(4):1153–1168. doi: 10.1007/s10530-016-1304-1

Fig. 5.

Fig. 5

Changes in population density of H. sanguineus over 10 years (±SE). The 10-year factor of increase in H. sanguineus density in Maine (a) was over 17-fold at 4 sites from 2005 to 2015. This Maine factor of increase was ×4.1 lower than the 10-year increase in southern New England described by O’Connor (2014) for sites in Rhode Island and Massachusetts (b). Southern New England data were taken from O’Connor (2014) and northern New England 2005 survey data were taken from Stephenson et al. (2009)