Table 2. Summarized molar TOC:TN, TOC:TP and TN:TP ratios for global lake water and lakes with different trophic states.

	TOC:TN	TOC:TP	TN:TP
Global lakes	21 ± 2.3 (20.64–21.79)	1467 ± 2.9 (1426.92–1508.00)	74 ± 2.5 (72.31–76.02)
Lakes divided by trophic states
Oligotrophic	nd	2185 ± 2.5 (2111.54–2260.48)	129 ± 1.9 (125.37–132.98)
Mesotrophic	nd	1387 ± 2.3 (1338.14–1436.81)	71 ± 1.8 (68.77–72.58)
Eutrophic	nd	375 ± 2.7 (349.54–403.09)	35 ± 2.7 (33.17–36.90)

Values in parentheses represent 95% confidence intervals. TOC, total organic carbon; TN, total nitrogen; TP, total phosphorus; nd, not determined.