Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China

Yang, Ping; Zhao, Guanglei; Tong, Chuan; Tang, Kam W.; Lai, Derrick Y.F.; Li, Ling; Tang, Changyuan

doi:10.1016/j.agee.2021.107662

Cited by 36 publications

(7 citation statements)

References 53 publications

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“…Most of the APs in the region cultivate shrimps, which can utilize the added nitrogen efficiently to produce harvestable biomass. Moreover, the removal of rooted vegetation during the construction of APs might also diminish the soil ability to retain N. In addition, the common practice of drying and liming the ponds and removing the topsoil between farming seasons would have disrupted the soil microbial community and prevented the long‐term accumulation of SON (P. Yang et al., 2021). All these reasons together might explain the counterintuitive decrease in labile N and SON mineralization following the conversion of SAs to APs.…”

Section: Discussionmentioning

confidence: 99%

Soil Organic Nitrogen Mineralization and N₂O Production Driven by Changes in Coastal Wetlands

Yang,

Hong

et al. 2024

Global Biogeochemical Cycles

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Plant invasion and land reclamation have drastically transformed the landscape of coastal wetlands globally, but their resulting effects on soil organic nitrogen (SON) mineralization and nitrous oxide (N2O) production remain unclear. In this study, we examined 21 coastal wetlands across southern China that have undergone habitat transformation from native mudflats (MFs) to Spartina alterniflora marshes (SAs), and subsequently to earthen aquaculture ponds (APs). We determined the SON net mineralization rate and the presence of pertinent enzyme‐encoding genes, namely chiA, pepA, and pepN. The SON net mineralization rate increased by 46.7% following the conversion of MFs to SAs but decreased by 33.1% in response to the transformation of SAs to APs. Nevertheless, there was no significant difference in the estimated mineralization efficiency of soil microbes among the habitat types. The results of structural equation modeling showed that N‐mineralization gene abundance played a major role in regulating SON mineralization. Although less than 20% of the SON was estimated to be labile/semi‐labile, SON mineralization was important in sustaining soil N2O production, with 5.8% of the mineralized N being fed into N2O production. Overall, our findings showed that the presence of S. alterniflora increased both SON content and mineralization rate, which would in turn promote further proliferation of this exotic plant along the coast. The conversion of S. alterniflora marshes to APs partially mitigated the positive effects of exotic plant invasion on SON turnover.

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Section: Discussionmentioning

confidence: 99%

Soil Organic Nitrogen Mineralization and N₂O Production Driven by Changes in Coastal Wetlands

Yang,

Hong

et al. 2024

Global Biogeochemical Cycles

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“…Most of the coastal aquaculture ponds in our study are for farming shrimp that have a relatively low feed conversion ratio (i.e. high efficiency to utilize feed), and therefore only a small amount of organic waste would be added to the soil (Yang et al, 2021;Fig. 8c).…”

Section: Soil N Response To Conversion Of Spartina Marsh To Aquacultu...mentioning

confidence: 99%

“…Land conversion to aquaculture ponds also changes soil particle size and creates a continuously water-logged environment, and the aquaculture operation itself may introduce additional disturbances to soil chemistry, e.g. by adding fertilizer and organic wastes (Kauffman et al, 2018;Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Latitudinal responses of wetland soil nitrogen pools to plant invasion and subsequent aquaculture reclamation along the southeastern coast of China

Tan,

Yang,

Lin

et al. 2024

Agriculture, Ecosystems & Environment

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“…About 75% of the production contribution comes from Asian countries, including China, Thailand, and Bangladesh, and 25% from Latin American countries like Mexico, Brazil, and Ecuador. Figure 1 gives an insight into the trends in shrimp production from 2000 to 2021 by significant producers (Martinez-Porchas and Martinez-Cordova 2012 ; Jayanthi et al 2018 ; Chang et al 2020b ; Elwin et al 2020 ; Salunke et al 2020 ; Crona et al 2020 ; Boyd et al 2021 ; Van Nguyen et al 2021 ; Yang et al 2021 ; Davis et al 2022 ). All types of shrimp farms have severe negative implications on the environment.…”

Section: Shrimp Farming and Sw: A Next-generation Challengementioning

confidence: 99%

Eco-friendly and safe alternatives for the valorization of shrimp farming waste

Wani,

Akhtar,

Mir

et al. 2023

Environ Sci Pollut Res

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The seafood industry generates waste, including shells, bones, intestines, and wastewater. The discards are nutrient-rich, containing varying concentrations of carotenoids, proteins, chitin, and other minerals. Thus, it is imperative to subject seafood waste, including shrimp waste (SW), to secondary processing and valorization for demineralization and deproteination to retrieve industrially essential compounds. Although several chemical processes are available for SW processing, most of them are inherently ecotoxic. Bioconversion of SW is cost-effective, ecofriendly, and safe. Microbial fermentation and the action of exogenous enzymes are among the significant SW bioconversion processes that transform seafood waste into valuable products. SW is a potential raw material for agrochemicals, microbial culture media, adsorbents, therapeutics, nutraceuticals, and bio-nanomaterials. This review comprehensively elucidates the valorization approaches of SW, addressing the drawbacks of chemically mediated methods for SW treatments. It is a broad overview of the applications associated with nutrient-rich SW, besides highlighting the role of major shrimp-producing countries in exploring SW to achieve safe, ecofriendly, and efficient bio-products.

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Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China

Cited by 36 publications

References 53 publications

Soil Organic Nitrogen Mineralization and N₂O Production Driven by Changes in Coastal Wetlands

Soil Organic Nitrogen Mineralization and N₂O Production Driven by Changes in Coastal Wetlands

Latitudinal responses of wetland soil nitrogen pools to plant invasion and subsequent aquaculture reclamation along the southeastern coast of China

Eco-friendly and safe alternatives for the valorization of shrimp farming waste

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Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China

Cited by 36 publications

References 53 publications

Soil Organic Nitrogen Mineralization and N2O Production Driven by Changes in Coastal Wetlands

Soil Organic Nitrogen Mineralization and N2O Production Driven by Changes in Coastal Wetlands

Latitudinal responses of wetland soil nitrogen pools to plant invasion and subsequent aquaculture reclamation along the southeastern coast of China

Eco-friendly and safe alternatives for the valorization of shrimp farming waste

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Product

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Soil Organic Nitrogen Mineralization and N₂O Production Driven by Changes in Coastal Wetlands

Soil Organic Nitrogen Mineralization and N₂O Production Driven by Changes in Coastal Wetlands