CO₂ was either emitted or absorbed by WSPs.

CH₄ and N₂O emissions by WSPs were highly variable but always positive.

The CO₂ uptake was apparently linked to phytoplankton activity and daytime stratification.

CO₂ fluxes from WSPs were of the same order of magnitude as those reported in tropical climates.

CH₄ fluxes were considerably higher when compared to fluxes from other aquatic ecosystems.