Fig. 3

Dissolved carbon (DC) concentrations in sampled inland waters in China. (a) In fresh lakes with different trophic status, (b) in reservoirs with different trophic status, (c) in fresh and saline lakes, (d) in lakes and reservoirs. The black line and the open square represent the median and mean respectively. The horizontal edges of the boxes denote the 25th and 75th percentiles; the whiskers denote the lower and upper limits of the data.