Urban landscape water is a hotspot of carbon dioxide (CO₂) and (CH₄) emissions to atmosphere, while little is known about the effect of aquatic plants, which is an important component of landscape water ecosystem, on greenhouse gas emissions dynamics in such water. In this study, we selected the Guanyin Pond National Wetland Park in Chongqing as a typical urban landscape water to carry out seasonal investigations for the fluxes and dissolved concentrations of CO₂ and CH₄ using floating chamber method and headspace method. The aims of this study were to explore contribution of aquatic plants to the spatio-temporal variations in aquatic CO₂ and CH₄ fluxes in urban landscape waters. The results showed that the concentrations of CO₂ and CH₄ ranged from 8.0-341.8 μmol/L to 0.23-5.26 μmol/L in Guanyin Pond, and the fluxes of CO₂ and CH₄ were ranging from 26.5 to 869.1 mmol m^-2 d^-1 and from 0.40 to 11.15 mmol m^-2 d^-1, respectively. Guanyin Pond was a net source of atmospheric CO₂ and CH₄. CO₂ and CH₄ fluxes in the open water area of Guanyin Pond were much lower than most of the reported values from ponds and lakes in urban area, while those in water area with aquatic vegetations distribution were much higher, indicating the aquatic plants enhanced the greenhouse gas emission of landscape water bodies. It was estimated that the plant transport contributed about 7.3%-44.6% and 52.1%-63.4% of total CO₂ and CH₄ fluxes from water-air surface, respectively. The contribution of plant transmission was different for different species despite no "biotype effect". The seasonal variations of CO₂ and CH₄ concentrations and fluxes in Guanyin Pond were significant with higher values in warm season and lower ones in cold season. We highlighted that the seasonal periodicity growth and temperature were main drivers for the seasonal patterns and variation intensity of CO₂ and CH₄ fluxes. Nutrients concentrations, pH and dissolved oxygen (DO) were influenced by aquatic vegetations distribution in Guanyin Pond, and were significantly correlated with CO₂ and CH₄ fluxes, indicating that the differentiation of water habitats caused by different aquatic plant species were important mechanism affecting the spatial variability of CO₂ and CH₄ dynamics. Despite mechanisms of aquatic plant impact on water CO₂ and CH₄ dynamics are complicated and various, aquatic plant distribution indeed enhance greenhouse gases fluxes of urban landscape water. Therefore, more attentions should be paid to the CO₂ and CH₄ dynamics in such special aquatic system in the future.