The flux of CH4 ranged from 2.00 to 21.70μmol m−2h−1 in this region, which is in broad agreement with records from other mangrove forests (e.g., 11.9–5168.6μmol m−2h−1 in Hong Kong, Chen et al., 2010; 5.73–201.88μmol m−2h−1
in East India, Chauhan et al., 2008) and salt marshes (e.g., 4.8–70.5μmol m−2h−1 in Min River Estuary, Tong et al., 2012;97.5–313.75μmol m−2h−1 in the Inner Mongolia marshes,Wang and Han, 2005) but generally toward the lower-end of the observed range which indicates that soils of Jiulong River Estuary act as a negligible source of atmospheric CH4