Methane distribution, sources, and sinks in an aquaculture bay (Sanggou Bay, China)

Hou, Jing; Zhang, Guiling; Sun, Miao; Ye, Wangwang; Song, Da Hee

doi:10.3354/aei00189

Cited by 12 publications

(6 citation statements)

References 53 publications

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“…The CH 4 fluxes we measured from sediment beneath oyster aquaculture (11.31 ± 4.70 μmol m –2 CH 4 hr –1 ) were higher than those from bare sediment (3.29 ± 1.30 μmol CH 4 m –2 hr –1 ) but not statistically significantly so. Hou et al suggested that release of CH 4 from the sediment was greater beneath oyster aquaculture than a polyculture of an unspecified bivalve and kelp, but no comparison was made with bare sediment. Bonaglia et al added Baltic clams (Limecola balthica) to sediment and recorded increased sediment CH 4 efflux, though their results cannot be applied to an aquaculture facility as they effectively created a short-term perturbation experiment.…”

Section: Resultsmentioning

confidence: 99%

Low Greenhouse Gas Emissions from Oyster Aquaculture

Ray

Maguire

Al‐Haj

et al. 2019

Environ. Sci. Technol.

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Production of animal protein is associated with high greenhouse gas (GHG) emissions. Globally, oyster aquaculture is increasing as a way to meet growing demands for protein, yet its associated GHG-emissions are largely unknown. We quantified oyster aquaculture GHG-emissions from the three main constituents of GHG-release associated with terrestrial livestock production: fermentation in the animal gut, manure management, and fodder production. We found that oysters release no methane (CH4) and only negligible amounts of nitrous oxide (0.00012 ± 0.00004 μmol N2O gDW–1 hr–1) and carbon dioxide (3.556 ± 0.471 μmol CO2 gDW–1 hr–1). Further, sediment fluxes of N2O and CH4 were unchanged in the presence of oyster aquaculture, regardless of the length of time it had been in place. Sediment CO2 release was slightly stimulated between 4 and 6 years of aquaculture presence and then returned to baseline levels but was not significantly different between aquaculture and a control site when all ages of culture were pooled. There is no GHG-release from oyster fodder production. Considering the main drivers of GHG-release in terrestrial livestock systems, oyster aquaculture has less than 0.5% of the GHG-cost of beef, small ruminants, pork, and poultry in terms of CO2-equivalents per kg protein, suggesting that shellfish aquaculture may provide a a low GHG alternative for future animal protein production compared to land based sources. We estimate that if 10% of the protein from beef consumption in the United States was replaced with protein from oysters, the GHG savings would be equivalent to 10.8 million fewer cars on the road.

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Section: Resultsmentioning

confidence: 99%

Low Greenhouse Gas Emissions from Oyster Aquaculture

Ray

Maguire

Al‐Haj

et al. 2019

Environ. Sci. Technol.

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“…During June to August 2017, pond sediment samples were collected in triplicate using a core sampler (Hou et al . 2016), from Day 0 (the day before the shrimp larvae were introduced into the pond) to Day 70 every 10 days intervals. Sediments were mixed and placed in sterile plastic bags, then sealed and transported to the laboratory on ice.…”

Section: Methodsmentioning

confidence: 99%

Community diversity and abundance of ammonia‐oxidizing archaea and bacteria in shrimp pond sediment at different culture stages

et al. 2020

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Aims Ammonia oxidation is a significant process of nitrogen cycles in a lot of ecosystems sediments while there are few studies in shrimp culture pond (SCP) sediments. This paper attempted to explore the community diversity and abundance of ammonia‐oxidizing archaea (AOA) and ammonia‐oxidizing bacteria (AOB) in SCP sediments at different culture stages. Methods and Results We collected SCP sediments and analysed the community diversity and abundance of AOA and bacteria in shrimp pond sediment at different culture stages using the ammonia monooxygenase (amoA) gene with quantitative PCR (qPCR) and 16S rRNA gene sequencing. The AOB‐amoA gene abundance was showed higher than AOA‐amoA gene abundance in SCP sediments on Day 50 and Day 60 after shrimp larvae introducing into the pond, and the diversity of AOA in SCP sediments was higher than that of AOB. The phylogenetic tree revealed that the most of AOA were the member of Nitrosopumilus and Nitrososphaera, and the majority of AOB sequences were clustered into Nitrosospira, Nitrosomonas clusters 6a and 7. The AOA community has close relationship with total organic carbon (TOC), pH, total phosphorus (TP), nitrate reductase, urease, acid phosphatase and β‐glucosidase. The AOB community was related to TOC, C/N and nitrate reductase. Conclusions AOA and AOB play the different ecological roles in SCP sediments at different culture stages. Significance and Impact of the Study Our results suggested that the different community diversity and abundance of AOA and AOB in SCP sediments, which may improve our ecological cognition of shrimp culture stages in SCP ecosystems.

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“…Meanwhile, the class of Thermoplasmata can digest organic matter and produce methane under anaerobic conditions (Poulsen et al, ). Therefore, the photosynthetic bacteria should be added to the P.J.S polyculture ponds in August and September to avoid the overproducing methane, which can impact the survival of cultured animals (Hou, Zhang, Sun, Ye, & Song, ).…”

Section: The Water Parameters Of Samplesmentioning

confidence: 99%