different sites. The variation coefficient of CO2 fluxes was 66.9% and
136.7% at the sites of Lake Mochou and Lake Tuanjie, respectively,
and integrated coefficient of variation was 97.4% throughout the
observation period. The variation coefficient of CH4 fluxes was
60.2% for the sites of Lake Mochou and 84.4% for the sites of Lake
Tuanjie, whereas integrated coefficient of variation was 71.5%
(Table 2). The large spatial variation in their fluxes may reflect the
ecological and environmental heterogeneity of the different sites in
the littoral zones.