Our team used North Creek in Ballina to take samples of greenhouse gas fluxes in three different zones along the waterway: urban in the lower catchment, mangroves in the mid-section and agriculture in the upper system. It was found that there were distinct tidal and diurnal differences in estuarine carbon (pCO2) and methane (CH4) with the highest levels found in the mangrove area. The result was a well recieved paper Methane and carbon dioxide dynamics in a subtropical estuary over a diel cycle: Insights from automated in situ radioactive and stable isotope measurements published in Marine Chemistry in 2014.