[Effect of environmental and biotic factors on net ecosystem CO exchange over a coastal wetland in the Yellow River Delta].

Using the eddy covariance technique, we measured the net ecosystem CO exchange (NEE) and its environmental and biotic factors over a coastal wetland in the Yellow River Delta to investigate the diurnal and seasonal variation in NEE and quantify the effect of environmental and biotic factors on NEE. The results showed that the diurnal change of NEE showed a distinct U-shaped curve during the growing season, but not with substantial variation in its amplitude during the non-growing season. During the growing season, the wetland acted as a significant net sink for CO, while it became carbon source during the non-growing season.