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Diurnal variations of greenhouse gases emissions from reclamation mariculture ponds

Publication ,  Journal Article
Hu, B; Xu, X; Zhang, J; Wang, T; Meng, W; Wang, D
Published in: Estuarine, Coastal and Shelf Science
May 31, 2020

Dissolved concentrations, saturation status, and emission fluxes of greenhouse gases (GHGs) in two reclamation mariculture ponds in the Bohai Gulf, China, were measured using the static headspace gas chromatography method and computed using a two-layer model of diffusive gas exchange. The study was conducted during August 2016 to assess diurnal variations in GHGs emissions. The main influencing factors of GHGs emissions from the ponds under the disturbance of artificial management were identified using Spearman correlation analyses and multiple stepwise regression analyses. Results showed that dissolved GHGs concentrations were stable throughout the day, whereas GHGs emission fluxes showed a clear diurnal variation with larger daytime values. The diurnal variation of N2O emission fluxes was greater than that of CO2 and that of CH4. Results also showed that pH of pond water was negatively correlated with CO2 and N2O emission fluxes and that air temperature was positively correlated with CH4 and N2O emission fluxes. In addition, ammonia (NH4+-N) was positively correlated with CH4 emission fluxes; water temperature and salinity were positively correlated with N2O emission fluxes. The estimated annual emissions from the reclamation aquaculture in Tianjin and the Bohai Rim region were 2.53 × 105 kg C–CO2, 6.94 × 103 kg C–CH4 and 1.11 × 103 kg N–N2O, and 3.42 × 107 kg C–CO2, 9.36 × 105 kg C–CH4 and 1.50 × 105 kg N–N2O respectively, indicating the important contribution of this fishery sector to GHGs emissions.

Duke Scholars

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Published In

Estuarine, Coastal and Shelf Science

DOI

ISSN

0272-7714

Publication Date

May 31, 2020

Volume

237

Related Subject Headings

  • Marine Biology & Hydrobiology
 

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Hu, B., Xu, X., Zhang, J., Wang, T., Meng, W., & Wang, D. (2020). Diurnal variations of greenhouse gases emissions from reclamation mariculture ponds. Estuarine, Coastal and Shelf Science, 237. https://doi.org/10.1016/j.ecss.2020.106677
Hu, B., X. Xu, J. Zhang, T. Wang, W. Meng, and D. Wang. “Diurnal variations of greenhouse gases emissions from reclamation mariculture ponds.” Estuarine, Coastal and Shelf Science 237 (May 31, 2020). https://doi.org/10.1016/j.ecss.2020.106677.
Hu B, Xu X, Zhang J, Wang T, Meng W, Wang D. Diurnal variations of greenhouse gases emissions from reclamation mariculture ponds. Estuarine, Coastal and Shelf Science. 2020 May 31;237.
Hu, B., et al. “Diurnal variations of greenhouse gases emissions from reclamation mariculture ponds.” Estuarine, Coastal and Shelf Science, vol. 237, May 2020. Scopus, doi:10.1016/j.ecss.2020.106677.
Hu B, Xu X, Zhang J, Wang T, Meng W, Wang D. Diurnal variations of greenhouse gases emissions from reclamation mariculture ponds. Estuarine, Coastal and Shelf Science. 2020 May 31;237.
Journal cover image

Published In

Estuarine, Coastal and Shelf Science

DOI

ISSN

0272-7714

Publication Date

May 31, 2020

Volume

237

Related Subject Headings

  • Marine Biology & Hydrobiology