A two-year measurement of methane and nitrous oxide emissions from freshwater aquaculture ponds: Affected by aquaculture species, stocking and water management

Fang, Xiao; Zhao, Jianting; Wu, Shuang; Yu, Kai; Huang, Jian; Ding, Ying; Hu, Tao; Xiao, Shuqi; Liu, Shuwei; Zou, Jianwen

doi:10.1016/j.scitotenv.2021.151863

Cited by 23 publications

(7 citation statements)

References 45 publications

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“…The average water-to-air emissions of CH 4 and N 2 O during the observed periods from the study ponds were within the ranges reported by previous studies (Table 4; Chen et al, 2016;Ma et al, 2018;Wu et al, 2018;Fang et al, 2022). The CH 4 fluxes from grass-fed fishing ponds were 20.79 ± 1.95 kg C ha −1 y −1 , which were substantially lower than recent reports in those fishing ponds in China, urban ponds in Netherland and stormwater ponds in United States Gorsky et al, 2019;van Bergen et al, 2019;Fang et al, 2022), and also quite lower than the crab ponds Ma et al, 2018), but much higher than that reported for shrimp ponds (Chen et al, 2016). Similar trends were found for the CH 4 fluxes in the intensive fishing ponds and no fishing ponds.…”

Section: Ch 4 and N 2 O Emission Fluxes In Pondssupporting

confidence: 87%

“…Similar trends were found for the CH 4 fluxes in the intensive fishing ponds and no fishing ponds. In contrast, the N 2 O fluxes in the grass-fed fishing ponds and no fishing ponds were 0.62 ± 0.10 kg N ha −1 y −1 and 0.65 ± 0.22 kg N ha −1 y −1 , respectively, which were generally much lower than those recorded in reservoirs and rivers located within the same or different Frontiers in Environmental Science frontiersin.org climatic zones (Chen et al, 2016;Fang et al, 2022). Furthermore, the N 2 O fluxes in the intensive fishing ponds were 1.14 ± 0.24 kg N ha −1 y −1 , and were much less than crab ponds and mixed mariculture ponds (Ma et al, 2018;Wu et al, 2018).…”

Section: Ch 4 and N 2 O Emission Fluxes In Pondsmentioning

confidence: 70%

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Agricultural land use and pond management influence spatial-temporal variation of CH4 and N2O emission fluxes in ponds in a subtropical agricultural headstream watershed

Fan

Zhang²,

Wu³

et al. 2022

Front. Environ. Sci.

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Small water bodies are hotspots of biogeochemical cycles with large spatial and temporal heterogeneity of their greenhouse gas emission fluxes. To reveal the spatial and temporal variabilities of methane (CH4) and nitrogen dioxide (N2O) emission fluxes in small water bodies in subtropical agricultural headwater watersheds, monthly measurements of CH4 and N2O fluxes were performed in 53 ponds from May 2018 to July 2020. Results showed that the fluxes of CH4 and N2O exhibited distinct spatial and temporal variations, and generally showed a trend of high emission rate in summer and low emission rate in winter. Agricultural land use and pond management had important impacts on CH4 and N2O emission fluxes in ponds. The CH4 and N2O emission fluxes were significantly higher in the ponds with the landscape of farmland, tea plantation and residential area than those of forest, which might be relevant to the eutrophication of pond water bodies. The mean N2O emission flux in intensive fishing ponds was much higher than that in grass-fed fishing ponds and no fishing ponds. Moreover, the sustained-flux global warming potential (SGWP) in the eutrophic pond water bodies of farmland, tea plantation and residential area are significantly higher than that in oligotrophic water bodies of forest ponds. Our CH4 and N2O emission results suggest that the reduction potential of 4.98 kg C ha−1 y−1 for CH4 and 0.42 kg N ha−1 y−1 for N2O will occur in future if ecological management measures are implemented to improve the pond water quality from eutrophication to oligotrophic conditions.

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Section: Ch 4 and N 2 O Emission Fluxes In Pondssupporting

confidence: 87%

Section: Ch 4 and N 2 O Emission Fluxes In Pondsmentioning

confidence: 70%

Agricultural land use and pond management influence spatial-temporal variation of CH4 and N2O emission fluxes in ponds in a subtropical agricultural headstream watershed

Fan

Zhang²,

Wu³

et al. 2022

Front. Environ. Sci.

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“…Also, the discontinuous measurements of CH 4 fluxes could propagate the biases of annual CH 4 fluxes estimated by this study. An aquaculture season usually starts in spring and ends in winter in China, and it is expected that CH 4 fluxes during warmer aquaculture season are larger than that from cooler non-aquaculture season. ,, However, most of the field measurements only reported data during the aquaculture season. If only CH 4 fluxes from continuous measurements throughout the year or from measurements in one season were used for upscaling, the total CH 4 emissions would be 1.43 ± 0.74 Tg CH 4 yr –1 and 1.90 ± 0.99 Tg CH 4 yr –1 during the period 2008–2019, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the missing records of some environmental factors, aquaculture species, and management practices prohibit the further analyses of relationships between CH 4 fluxes and various environmental factors. For instance, the benthic bioturbation by crab or shrimp could trigger bubbling and therefore increase CH 4 emissions, while less bioturbation activity generated by fish might inhibit CH 4 emissions by increasing oxygen availability to a greater depth in aquaculture pond bottoms. , As a result, more observational data with high sampling frequency and detailed experimental records throughout the entire year are expected to improve the accuracy of estimated CH 4 fluxes at various temporal scales in the future.…”

Section: Discussionmentioning

confidence: 99%

Quantifying Methane Emissions from Aquaculture Ponds in China

Dong

Cui

et al. 2022

Environ. Sci. Technol.

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Small ponds are important methane (CH 4 ) sources. However, current estimates of CH 4 emissions from aquaculture ponds are largely uncertain due to data paucity, especially in China�the largest aquaculture producer in the world. Here, we present a nationwide metadata analysis with a database of 55 field observations to examine total CH 4 emissions from aquaculture ponds in China. We found that the annual CH 4 fluxes from aquaculture ponds are much larger than those from reservoirs and lakes. The total CH 4 emission from aquaculture ponds is 1.60 ± 0.62 Tg CH 4 yr −1 , with an average growth rate of ∼0.03 Tg CH 4 yr −2 during the period 2008−2019. Compared with global major protein-producing livestocks, aquaculture species have a lower (63%) emission intensity, defined by the amount of CH 4 emitted per unit of animal proteins. Our study highlights the essential contribution of China's aquaculture ponds to national CH 4 emissions and the lower environmental cost of the aquaculture sector for future animal protein production. More field measurements with multi-scale observations are urgently needed to reduce the uncertainty of CH 4 emissions from aquaculture ponds.

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“…Continuous flooding in aquaculture ponds creates a favorite anaerobic environment for CH 4 production but an unfavorite environment for CH 4 oxidation, resulting in high CH 4 emission. Some studies indicated that CH 4 emission was significantly lower from the mechanical aerated area than the unaerated area, suggesting that mechanical aeration may benefit to reduce CH 4 emissions. , However, mechanical aeration only increases O 2 in the water of limited area around the aerators. CH 4 emitted from the ponds was primarily produced in the sediment, and the O 2 deficiency is more serious in the sediment than in water.…”

Section: Introductionmentioning

confidence: 99%

Higher Food Yields and Lower Greenhouse Gas Emissions from Aquaculture Ponds with High-Stalk Rice Planted

Qian

Yang

et al. 2023

Environ. Sci. Technol.

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Aquaculture ponds are an important artificial aquatic system for global food fish production but also are a hot spot of greenhouse gas (GHG) emissions. The GHG mitigation strategy and the underlying mechanism for aquaculture ponds are still poorly understood. In this study, we conducted a 2 year field experiment to determine the effects of planting high-stalk rice (an artificially bred emergent plant for ponds) on GHG emissions from aquaculture ponds. Our results showed that planting high-stalk rice reduced CH 4 emission by 64.4% and N 2 O emission by 76.2% over 2 years. Planting high-stalk rice significantly increased the content of O 2 and the abundance of pmoA in the sediment, thus prompting CH 4 oxidation in the ponds. The reduction of N 2 O emission from ponds was attributed to the decreased inorganic nitrogen, amoA-B and nirS in the sediment induced by rice. Furthermore, high-stalk rice culture in the pond increased shrimp yields and gained rice yields, resulting in a significant reduction of yield-scaled global warming potential. Our findings suggest that breeding appropriate emergent aquatic plants is a potential pathway to mitigate GHG emission from aquaculture ponds with more food yields and economic benefits.

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A two-year measurement of methane and nitrous oxide emissions from freshwater aquaculture ponds: Affected by aquaculture species, stocking and water management

Cited by 23 publications

References 45 publications

Agricultural land use and pond management influence spatial-temporal variation of CH4 and N2O emission fluxes in ponds in a subtropical agricultural headstream watershed

Agricultural land use and pond management influence spatial-temporal variation of CH4 and N2O emission fluxes in ponds in a subtropical agricultural headstream watershed

Quantifying Methane Emissions from Aquaculture Ponds in China

Higher Food Yields and Lower Greenhouse Gas Emissions from Aquaculture Ponds with High-Stalk Rice Planted

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