Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China

Yang, Ping; Tang, Kam W.; Yang, Hong; Tong, Chuan; Yang, Nan; Lai, Derrick Y.F.; Ruan, Manjing; Tan, Yingying; Zhao, Guanglei; Li, Ling; Tang, Changyuan

doi:10.1016/j.agee.2022.107995

Cited by 18 publications

(3 citation statements)

References 75 publications

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“…(2013) measured carbon mineralization under aerobic condition, which did not represent the water‐logged, low‐oxygen condition of the soil and which would have suppressed methanogenesis and underestimated the labile carbon turnover. APs had 25% higher SOC, but 41%–42% higher bioavailable carbon and carbon mineralization than MFs, reflecting the high amounts of sedimented labile organics from excess feeds and biological productivity in the ponds (Yang et al., 2022).…”

Section: Discussionmentioning

confidence: 99%

“…The data used in this study are available in the Mendeley research data repository: Yang et al. (2022), Ancillary variables, SOC mineralization parameters, and carbon greenhouse gases production potential in impacted coastal wetlands across a wide latitudinal range in China, Mendeley Data, V1 (https://doi.org/10.17632/d4sp5hkmmm.1).…”

Section: Data Availability Statementmentioning

confidence: 99%

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Landscape Change Affects Soil Organic Carbon Mineralization and Greenhouse Gas Production in Coastal Wetlands

Yang

Zhang

Lai

et al. 2022

Global Biogeochemical Cycles

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Plant invasion and aquaculture activities have drastically modified the landscape of coastal wetlands in many countries, but their impacts on soil organic carbon (SOC) mineralization and greenhouse gas production remain poorly understood. We measured SOC mineralization rate and soil CO2 and CH4 production rates in three habitat types from 21 coastal sites across the tropical and subtropical zones in China: native mudflats (MFs), Spartina alterniflora marshes (SAs), and aquaculture ponds (APs). Landscape change from MFs to SAs or APs increased total and labile fraction of SOC, as well as carbon mineralization rate and greenhouse gas production, but there were no discernible differences in SOC source‐sink dynamics between SAs and APs. SOC mineralization rate was highest in SAs (20.4 μg g−1 d−1), followed by APs (16.9 μg g−1 d−1) and MFs (11.9 μg g−1 d−1), with CO2 as the dominant by‐product. Bioavailable SOC was less than 2% and was turned over within 60 days in all three habitat types. Proliferation of S. alterniflora marshes and expansion of AP construction had resulted in a net increase in soil CO2‐eq production of 0.4–4.3 Tg yr−1 in the last three decades. Future studies will benefit from better census and monitoring of coastal habitats in China, complementary in situ measurements of greenhouse gas emissions, and more sampling in the southern provinces to improve spatial resolution.

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Section: Discussionmentioning

confidence: 99%

Section: Data Availability Statementmentioning

confidence: 99%

Landscape Change Affects Soil Organic Carbon Mineralization and Greenhouse Gas Production in Coastal Wetlands

Yang

Zhang

Lai

et al. 2022

Global Biogeochemical Cycles

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“…With the development of macroalgae culture since the 1960s, the sedimentation of biological detritus during the growth of macroalgae can result in a significant amount of extra organic matter being buried in the sediments (Vetter and Dayton, 1999;Carroll et al, 2003;Yang et al, 2022). Additionally, the large-scale culture of macroalgae can reduce the velocity of water flow (Zhao et al, 1996;Grant and Bacher, 2001).…”

Section: Response Of Composition and Burial Flux Of Sedimental Bc To ...mentioning

confidence: 99%

Blue carbon in sediment from Sanggou Bay: composition, burial flux and its response to human activities

Yang,

Song

et al. 2024

Front. Mar. Sci.

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Marine primary production and terrestrial input are the main sources of buried carbon in sediments of marginal seas. Only marine-source carbon buried in sediments, fixed and stored by marine ecosystems, belongs to “blue carbon” and reflects marine ecosystems’ carbon sink function. The pattern of buried blue carbon in sediments, its flux, and its relationship with environmental changes remain unclear. The study aimed to investigate the composition of blue carbon in the sediments of Sanggou Bay, a special type of marginal sea. The analysis of sediment carbon sources was conducted through the C/N ratio and microscopic examination. The study also examined the long-term changes in the blue carbon burial fluxes. Results showed Blue carbon, which is sea-sourced carbon, accounted for about 23% of the total carbon content and its concentration ranged from 0.17% to 0.51%, with an average of about 0.25% ± 0.10%. The content of organic blue carbon in this sea area ranges from 0.09% to 0.26%, with an average of around 0.18% ± 0.04%. It constitutes approximately 72% of the buried blue carbon in the sediment, making it the primary component of buried blue carbon. Meanwhile, the content of inorganic blue carbon ranges from 0.01% to 0.32%. Over the past 70 years, the burial fluxes of sedimentary blue carbon, organic blue carbon and inorganic blue carbon in the Sanggou Bay are about 0.54 ± 0.22 mmol/(cm2a), 0.38 ± 0.07 mmol/(cm2a) and 0.17 ± 0.22 mmol/(cm2a), respectively; their long-term changes have been significantly affected by human aquaculture activities. Large-scale raft-rack aquaculture activities have caused a reduction in water flow velocity and an increase in the deposition of particulate organic matter, which in turn has led to the burial of organic blue carbon in the sediment. Additionally, the competition between aquaculture products and small calcareous organisms, such as mussels, foraminifera, may have inhibited the growth of small calcareous organisms. We suggest this has resulted in reduced burial fluxes of inorganic blue carbon and a decrease in its proportion among total blue carbon in the sea area. Our findings imply that aquaculture activities in Sanggou Bay had a negative impact on the burial of blue carbon in the sediments.

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Assessing carbon greenhouse gas emissions from aquaculture in China based on aquaculture system types, species, environmental conditions and management practices

Zhang

Tang²,

Yang³

et al. 2022

Agriculture, Ecosystems & Environment

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Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China

Cited by 18 publications

References 75 publications

Landscape Change Affects Soil Organic Carbon Mineralization and Greenhouse Gas Production in Coastal Wetlands

Landscape Change Affects Soil Organic Carbon Mineralization and Greenhouse Gas Production in Coastal Wetlands

Blue carbon in sediment from Sanggou Bay: composition, burial flux and its response to human activities

Assessing carbon greenhouse gas emissions from aquaculture in China based on aquaculture system types, species, environmental conditions and management practices

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