Quantifying Methane Emissions from Aquaculture Ponds in China

Dong, Bogang; Xi, Yi; Cui, Yongxing; Peng, Shushi

doi:10.1021/acs.est.2c05218

Cited by 26 publications

(16 citation statements)

References 39 publications

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“…The CH 4 fluxes from aquaculture was acquired from two latest comprehensive studies (Dong et al., 2023; Zhang, Tang, et al., 2022). Zhang, Tang, et al.…”

Section: Methodsmentioning

confidence: 99%

“…The CH 4 fluxes from aquaculture was acquired from two latest comprehensive studies (Dong et al, 2023;Zhang, Tang, et al, 2022). Zhang, Tang, et al (2022) presented a nationwide metadata analysis from 132 aquaculture sites in China based on 62 published papers.…”

Section: Agriculturementioning

confidence: 99%

“…Four land-based aquaculture systems were considered, including the coastal wetland reclamation system (CWRS), inland pond system (IPS), lake/reservoir system (LRS) and ricefield system (RFS). Dong et al (2023) analyzed the CH 4 emissions from aquaculture ponds in China with a database of 55 field observations, which corresponds to the emissions from IPS ecosystems.…”

Section: Agriculturementioning

confidence: 99%

See 2 more Smart Citations

The Greenhouse Gas Budget of Terrestrial Ecosystems in East Asia Since 2000

Wang,

Gao,

Jeong

et al. 2024

Global Biogeochemical Cycles

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East Asia (China, Japan, Koreas, and Mongolia) has been the world's economic engine over at least the past two decades, exhibiting a rapid increase in fossil fuel emissions of greenhouse gases (GHGs) and has expressed the recent ambition to achieve climate neutrality by mid‐century. However, the GHG balance of its terrestrial ecosystems remains poorly constrained. Here, we present a synthesis of the three most important long‐lived greenhouse gases (CO2, CH4, and N2O) budgets over East Asia during the decades of 2000s and 2010s, following a dual constraint approach. We estimate that terrestrial ecosystems in East Asia is close to neutrality of GHGs, with a magnitude of between −46.3 ± 505.9 Tg CO2eq yr−1 (the top‐down approach) and −36.1 ± 207.1 Tg CO2eq yr−1 (the bottom‐up approach) during 2000–2019. This net GHG sink includes a large land CO2 sink (−1229.3 ± 430.9 Tg CO2 yr−1 based on the top‐down approach and −1353.8 ± 158.5 Tg CO2 yr−1 based on the bottom‐up approach) being offset by biogenic CH4 and N2O emissions, predominantly coming from the agricultural sectors. Emerging data sources and modeling capacities have helped achieve agreement between the top‐down and bottom‐up approaches, but sizable uncertainties remain in several flux terms. For example, the reported CO2 flux from land use and land cover change varies from a net source of more than 300 Tg CO2 yr−1 to a net sink of ∼−700 Tg CO2 yr−1. Although terrestrial ecosystems over East Asia is close to GHG neutral currently, curbing agricultural GHG emissions and additional afforestation and forest managements have the potential to transform the terrestrial ecosystems into a net GHG sink, which would help in realizing East Asian countries' ambitions to achieve climate neutrality.

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“…The CH 4 fluxes from aquaculture was acquired from two latest comprehensive studies (Dong et al., 2023; Zhang, Tang, et al., 2022). Zhang, Tang, et al.…”

Section: Methodsmentioning

confidence: 99%

Section: Agriculturementioning

confidence: 99%

Section: Agriculturementioning

confidence: 99%

See 1 more Smart Citation

The Greenhouse Gas Budget of Terrestrial Ecosystems in East Asia Since 2000

Wang,

Gao,

Jeong

et al. 2024

Global Biogeochemical Cycles

Self Cite

View full text Add to dashboard Cite

show abstract

“…Aquaculture ponds characteristic of shallow depth, abundant C substrates, and strong human disturbances (e.g., artificial aeration, feeding, and dredging) are hotspots of GHG emissions (Dong et al (2022); Holgerson and Journal of Geophysical Research: Biogeosciences 10.1029/2023JG007675 Raymond [2016]; Figure 4). China has the largest aquaculture industry in the world, accounting for 39% of the global aquaculture pond area and about 60% of the global aquaculture production (Dong et al, 2022). A recent synthesis of CO 2 emissions from China's aquaculture ponds shows that the CO 2 fluxes (15.0 Tg C yr 1 ) exceeded those of reservoirs and lakes (Zhang et al (2022b); Table 2), although the area of aquaculture ponds represents only 17.8% of that of reservoirs and lakes (Lv et al, 2022).…”

Section: Aquaculture Pondsmentioning

confidence: 99%

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Yang,

Chen,

et al. 2024

JGR Biogeosciences

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Inland waters are significant emitters of greenhouse gases for the atmosphere and play an important role in the global carbon cycle. With a vast land area in East Asia spanning a broad range of climatic conditions, China has a large number of natural and human‐made water bodies. These inland water systems are of global importance because of their high carbon emission fluxes. Over the past decades, China has experienced unprecedented environmental changes driven by rapid economic development, which have profoundly modified its inland water carbon biogeochemistry and associated emissions. This review focuses on carbon dioxide (CO2) and methane (CH4) emission dynamics from China's inland waters in response to global change. Major drivers of CO2 and CH4 emissions, including aquatic metabolism, hydrological and climatic factors, and prevailing human impacts, are examined. To advance our understanding of carbon emissions from China's inland waters, we further identify several critical knowledge gaps, such as inadequate research in headwater streams and the climate‐sensitive Tibetan Plateau aquatic ecosystems. Furthermore, insufficient understanding of carbon emissions from inland waters undergoing extensive human interventions (e.g., damming, flow regulation, pollution, and farming practices in aquaculture ponds) is highlighted. We suggest that future efforts should be made to better capture the spatiotemporal heterogeneity in dissolved CO2 and CH4 concentrations and fluxes across China as well as their long‐term trends. To overcome uncertainties in carbon sources and current flux estimates, future research to mechanistically understand carbon transport and transformation in Chinese inland waters and their underlying processes is particularly needed.

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“…Many studies have measured the flux rates of GHG emissions from aquaculture ponds and analyzed the factors influencing the production and diffuse processes in ponds during the last decade. − However, the solution to mitigate GHG emissions from aquaculture ponds remains unclear. Reducing CH 4 emission is the primary target because CH 4 contributes far more than N 2 O to the total global warming potential (GWP) due to the continuous flooded condition in aquaculture ponds. , The net CH 4 emission from aquaculture ponds is determined by the CH 4 production and oxidation processes.…”

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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Quantifying Methane Emissions from Aquaculture Ponds in China

Cited by 26 publications

References 39 publications

The Greenhouse Gas Budget of Terrestrial Ecosystems in East Asia Since 2000

The Greenhouse Gas Budget of Terrestrial Ecosystems in East Asia Since 2000

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

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

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