Fig. 2. Site comparison of (a) bulk soil carbon content, (b) dissolved organic carbon (DOC) of the soil extractions, (c) specific ultraviolet light absorption (SUVA) of the extracted DOC, (d) available carbon content (measured as CO₂ produced in 40 d) of bulk soils, (e) total trihalomethane formation potential (TTHMFP), and (f) specific trihalomethane formation potential (STHMFP) of the extracted dissolved organic C at Twitchell Island, California. Ag1 and Ag2, agricultural field sites; Wo, open-water wetland site; Wv, vegetated wetland site.