Impacts of long-line aquaculture of Pacific oysters (Crassostrea gigas) on sulfate reduction and diffusive nutrient flux in the coastal sediments of Jinhae–Tongyeong, Korea

Hyun, Jung‐Ho; Kim, Sung-Han; Mok, Jin-Sook; Lee, Jae Seong; An, Sung‐Uk; Lee, Won‐Chan; Jung, Rae-Hong

doi:10.1016/j.marpolbul.2013.07.004

Cited by 51 publications

(39 citation statements)

References 55 publications

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“…In our study, the average concentrations of DSi increased by 9.0 µM from July to October, and decreased rapidly from 14.2 to 4.76 µM in January. Phytoplankton abundance was tightly controlled by filter feeding of oysters (Hyun et al 2013), so the high metabolic rates of oysters may result in a reduction of diatom biomass, leading to high levels of DSi in autumn. In addition, as the water depth in SGB is ≤ 20 m, sediment resuspension and diatom dissolution might be important sources of DSi during the summer to autumn period.…”

Section: Effects Of Aquaculture Activities On Nutrient Biogeochemicalmentioning

confidence: 99%

Sources and export of nutrients associated with integrated multi-trophic aquaculture in Sanggou Bay, China

Li¹,

Liu²,

Zhang³

et al. 2016

Aquacult. Environ. Interact.

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Field observations were made from 2012 to 2014 at an integrated multi-trophic aquaculture (IMTA) site in Sanggou Bay (SGB), China, to characterize the nutrients associated with aquaculture activities, and to assess the effects of aquaculture on nutrient cycles in the bay. Dissolved inorganic and organic nutrient levels were measured in rivers, groundwater, and SGB. Seasonal variations in nutrient concentrations were detected in the rivers, particularly enrichment of dissolved inorganic nitrogen (DIN) and silicate (DSi). Nutrient concentrations showed considerable seasonal variation, with higher and significantly different concentrations occurring in autumn than in the other seasons. The composition and distribution of nutrients were also affected by the species being cultured. Dissolved organic nitrogen and phosphorus (DON and DOP) accounted for 27 to 87% of total dissolved nitrogen and 34 to 81% of total dissolved phosphorus, respectively. Phosphorus may be a potentially limiting nutrient for phytoplankton growth in summer. Nutrient budgets were developed based on a simple steady-state box model. These showed that bivalve aquaculture was the major source of PO 4 3− (contributing 64% of total influx) and led to increased riverine fluxes of PO 4 3− . The results indicated that substantial quantities of nitrogen and DSi accumulated in sediments or were transformed into other forms (e.g. phytoplankton cell composition or particles). Large quantities of DIN and PO 4 3− were removed from the bay through harvesting of seaweeds and bivalves, which represented up to 64 and 81% of total outflux, respectively. The results show that aquaculture activities play the most important role in nutrient cycling in SGB.

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Section: Effects Of Aquaculture Activities On Nutrient Biogeochemicalmentioning

confidence: 99%

Sources and export of nutrients associated with integrated multi-trophic aquaculture in Sanggou Bay, China

Li¹,

Liu²,

Zhang³

et al. 2016

Aquacult. Environ. Interact.

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“…Although the N loss by coupled nitrification−denitrification and NH 4 + adsorption onto clay minerals contributed to the low DIN efflux, the high DIN:PO 4 3− flux ratios (Table 2) indicated the degree to which PO 4 3− is retained by adsorption in Sanggou Bay. Hence, PO 4 3− sorption widely occurred in monoculture (Hyun et al 2013) and IMTA areas. The DOP fluxes were mainly af fected by aquaculture activities (see 'Aquaculture activities and benthic nutrient fluxes in different seasons').…”

Section: Environmental Factors Controlling Benthic Fluxesmentioning

confidence: 96%

“…5d). The higher Si(OH) 4 con centration in seawater in September (Table 1) was related to a lesser biomass of diatoms in the seawater, because the abundance of phytoplankton was tightly controlled by filter-feeding oysters (Hyun et al 2013); therefore, heavy grazing by oysters may result in the reduction of the Si(OH) 4 flux at Stn MC in September. In comparison to other monoculture areas, competition with co-cultivated kelp resulted in lower diatom biomass in the IMTA system (Yuan et al 2014), resulting in lower benthic Si(OH) 4 fluxes in the IMTA than in monoculture (Table 3).…”

Section: Environmental Factors Controlling Benthic Fluxesmentioning

confidence: 99%

“…IMTA: integrated multi-trophic aquaculture; TOC: total orga nic carbon; φ: porosity of the surface sediment. MC and ST1 are the sampling stations (Hyun et al 2013). When discussing the impacts of aquaculture on benthic nutrient fluxes, it is important to clarify the sources of brodeposits by the marine organisms to the sediments using sediment traps or natural isotopic tracers, etc.…”

Section: Aquaculture Activities and Benthic Nutrient Fluxes In Differmentioning

confidence: 99%

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Impacts of an integrated multi-trophic aquaculture system on benthic nutrient fluxes: a case study in Sanggou Bay, China

Ning¹,

Liu

Zhang³

et al. 2016

Aquacult. Environ. Interact.

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Benthic nutrient fluxes in an integrated multi-trophic aquaculture (IMTA) baySanggou Bay, China -were measured in June and September 2012. The benthic nutrient fluxes and total organic carbon (TOC) of sediment in this IMTA system were significantly lower than in monoculture bays. This was due to the efficient recycling of organic matter in the IMTA system, as revealed by historical data of annual production, dissolved inorganic nitrogen (DIN) concentration in seawater and TOC in sediment. Benthic nutrient fluxes in the IMTA system were mainly controlled by seawater temperature, dissolved oxygen (DO) and nutrient concentrations, which were strongly related to aquaculture activities. In June, the early growth phase of cultured finfish and bivalves contributed little to biodeposition, and benthic nutrient fluxes tended to be from the sediment to the seawater and contributed to algal growth. In September, the active growth of finfish and bivalves resulted in high concentrations of nutrients in the seawater and TOC in the sediment; 64% of the nitrogen and 25% of the phosphorus metabolized by bivalves were transferred from the seawater to the sediment.

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“…The warming of seawater will ultimately intensify the stratification of the surface water column and might induce hypoxic conditions in bottom waters (Coma et al 2009;Middelburg and Levin 2009). Hypoxic conditions further restrict the supply of Fe oxides and thus sequentially enhance the accumulation of sulfide in sediment (Kristensen et al 2003;Hyun et al 2013). Several Mediterranean seagrass meadows have suffered from sulfide stress triggered by increased water temperature (Marbà and Duarte 2010;Gracía et al 2012Gracía et al , 2013.…”

Section: Biogeochemical Implications Of the Expansion Of H Nipponicamentioning

confidence: 99%

Sulfate Reduction and Sulfur Cycles at Two Seagrass Beds Inhabited by Cold Affinity Zostera marina and Warm Affinity Halophila nipponica in Temperate Coastal Waters

Kim

Choi

Lee

et al. 2017

Estuaries and Coasts

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To evaluate the impact of invading seagrass on biogeochemical processes associated with sulfur cycles, we investigated the geochemical properties and sulfate reduction rates (SRRs) in sediments inhabited by invasive warm affinity Halophila nipponica and indigenous cold affinity Zostera marina. A more positive relationship between SRR and belowground biomass (BGB) was observed at the H. nipponica bed (SRR = 0.6809 × BGB − 4.3162, r 2 = 0.9878, p = 0.0006) than at the Z. marina bed (SRR = 0.3470 × BGB − 4.0341, r 2 = 0.7082, p = 0.0357). These results suggested that SR was more stimulated by the dissolved organic carbon (DOC) exuded from the roots of H. nipponica than by the DOC released from the roots of Z. marina. Despite the enhanced SR in spring-summer, the relatively lower proportion (average, 20%) of acid-volatile sulfur (AVS) in total reduced sulfur and the strong correlation between total oxalate-extractable Fe (Fe (oxal) ) and chromium-reducible sulfur (CRS = 0.2321 × total Fe (oxal) + 1.8180, r 2 = 0.3344, p = 0.0076) in the sediments suggested the rapid re-oxidation of sulfide and precipitation of sulfide with Fe. The turnover rate of the AVS at the H. nipponica bed (0.13 day −1 ) was 2.5 times lower than that at the Z. marina bed (0.33 day −1). Together with lower AVS turnover, the stronger correlation of SRR to BGB in the H. nipponica bed suggests that the extension of H. nipponica resulting from the warming of seawater might provoke more sulfide accumulation in coastal sediments.

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Impacts of long-line aquaculture of Pacific oysters (Crassostrea gigas) on sulfate reduction and diffusive nutrient flux in the coastal sediments of Jinhae–Tongyeong, Korea

Cited by 51 publications

References 55 publications

Sources and export of nutrients associated with integrated multi-trophic aquaculture in Sanggou Bay, China

Sources and export of nutrients associated with integrated multi-trophic aquaculture in Sanggou Bay, China

Impacts of an integrated multi-trophic aquaculture system on benthic nutrient fluxes: a case study in Sanggou Bay, China

Sulfate Reduction and Sulfur Cycles at Two Seagrass Beds Inhabited by Cold Affinity Zostera marina and Warm Affinity Halophila nipponica in Temperate Coastal Waters

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