Atmospheric Environment | VOL. 115
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Fluxes of greenhouse gases at two different aquaculture ponds in the coastal zone of southeastern China

Publication Date Aug 1, 2015

Abstract

Abstract Shallow water ponds are important contributors to greenhouse gas (GHG) fluxes into the atmosphere. Aquaculture ponds cover an extremely large area in China's entire coastal zone. Knowledge of greenhouse gas fluxes from aquaculture ponds is very limited, but measuring GHG fluxes from aquaculture ponds is fundamental for estimating their impact on global warming. This study investigated the magnitude of carbon dioxide (CO 2 ), methane (CH 4 ) and nitrous oxide (N 2 O) fluxes from two coastal aquaculture ponds during 2011 and 2012 in the Shanyutan wetland of the Min River estuary, southeastern China, and determined the factors that may regulate GHG fluxes from the two ponds. The average fluxes of CO 2 , CH 4 and N 2 O were 20.78 mgCO 2  m −2  h −1 , 19.95 mgCH 4  m −2  h −1 and 10.74 μgN 2 O m −2  h −1 , respectively, in the shrimp pond. The average fluxes of CO 2 , CH 4 and N 2 O were −60.46 mgCO 2  m −2  h −1 , 1.65 mgCH 4  m −2  h −1 and 11.8 μgN 2 O m −2  h −1 , respectively, in the mixed shrimp and fish aquaculture pond during the study period. The fluxes of all three gases showed distinct temporal variations. The variations in the GHG fluxes were influenced by interactions with the thermal regime, pH, trophic status and chlorophyll- a content. Significant differences in the CO 2 and N 2 O fluxes between the shrimp pond and the mixed aquaculture pond were observed from September to November, whereas the CH 4 fluxes from the two ponds were not significantly different. The difference in the CO 2 flux likely was rela...

Concepts

Greenhouse Gas Fluxes Shrimp Pond Aquaculture Ponds Coastal Aquaculture Ponds Measuring Greenhouse Gas Fluxes Fluxes Of CO Shallow Water Ponds Entire Coastal Zone Trophic Status Mineralization Of Organic Matter

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