Fig. 3From: Spatiotemporal variation and source apportionment of organotin compounds in sediments in the Yangtze EstuarySpatial variation of total organotins in the Nearshore area, the ETM zone and the Plume zone in 2015 and 2016. Different letters (# and *) above the error bar mean significant difference based on non-parametric Kruskal–Wallis test (p < 0.05)Back to article page