The impact of suspended oyster farming on macrobenthic community in a eutrophic, semi-enclosed bay: Implications for recovery potential

Liao, Yibo; Liu, Qiang; Shou, Lidan; Tang, Yanbin; Liu, Qinghe; Zeng, Jiangning; Chen, Quanzhen; Yan, Xiaojun

doi:10.1016/j.aquaculture.2021.737585

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…In the present study, chlorophyll-a content was lowest in winter, consistent with the seasonal distribution of Chla observed in Lianyungang [44]. Studies have suggested that shellfish farming can mitigate eutrophication by removing chlorophyll and improving water transparency [45,46]. Since the 1980s, Portuguese oysters (Crassostrea angulata) have been introduced for farming [15].…”

Section: Factors Influencing Temporal and Spatial Variations In Nutri...supporting

confidence: 88%

Dissolved Inorganic Nutrient Biogeochemistry in an Urbanized Coastal Region: A Study of Dapeng Cove, Shenzhen

Tong,

Chen,

Zhang

2023

Sustainability

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Dissolved inorganic nutrients are pivotal in maintaining the material and energy balance of marine ecosystems, impacting the survival and dynamic succession of marine organisms. To gain a deeper understanding of the source and sink characteristics of dissolved inorganic nutrients in bays affected by human activities and to elucidate the processes involving filter-feeding shellfish in relation to these nutrients, this study investigated the source and sink dynamics of dissolved inorganic nutrients in the Dapeng Cove sea area of Shenzhen. Over the past decade, a significant change in the N/P ratio within the survey area has been observed, suggesting a shift in nutrient limitation from nitrogen to phosphorus or phosphorus–silicon limitation. This induced change in the N/P ratio, along with Si/N and Si/P ratios, may facilitate the growth of cyanobacteria and, subsequently, alter the proportions of diatoms, dinoflagellates, and cyanobacteria. Seasonal fluctuations in human disturbance intensity and precipitation determine the seasonal and spatial distribution of nutrients in the bay, thereby influencing the bay ecosystem metabolism. The Land–Ocean Interactions in the Coastal Zone (LOICZ) model analysis revealed that the bay represents a major source of inorganic nitrogen and a source of phosphate in spring, summer, and autumn, while acting as a sink for phosphate in winter. Furthermore, rivers and groundwater represent the primary sources of phosphate and inorganic nitrogen in the bay. The bay exhibits an annual net ecosystem metabolic rate of 7.06 mmol C/m2/d, with denitrification dominating the nitrogen cycle at 12.65 mmol C/m2/d. Overall, the Dapeng Cove ecosystem displays net production exceeding respiration, classifying it as an autotrophic system. Additionally, the nitrogen cycle in the sea area is predominantly driven by denitrification. The analysis also revealed that the impact of oyster proliferation on the physical and chemical factors in the surveyed area is relatively weaker than that of surface runoff and groundwater inputs.

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Section: Factors Influencing Temporal and Spatial Variations In Nutri...supporting

confidence: 88%

Dissolved Inorganic Nutrient Biogeochemistry in an Urbanized Coastal Region: A Study of Dapeng Cove, Shenzhen

Tong,

Chen,

Zhang

2023

Sustainability

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“…However, the clear community separation between the oyster farming area and the other two treatment areas in this study indicates that oyster farming may have a larger impact on the benthic community. Tis might be demonstrated from another study where macrobenthos species richness and abundance beneath an oyster farm in Xiangshan Bay increased signifcantly 3 years after oyster farming ceased, and more than 75% of dominant taxa were re-established [15]. Costa and Nalesso [69] revealed that the sediment microbenthic community in long-line mussel farms in Anchieta, Southeast Brazil, showed signifcantly higher diversity and richness.…”

Section: Efects Of Ark Shell Enhancement and Oyster Farming Onmentioning

confidence: 94%

“…Bivalve shellfsh aquaculture can be viewed as a disturbance that modifes the coastal ecosystem [13], but the impact of this disturbance can be positive or negative and difers depending on the system. Concentrated bivalve biomass with high fltration rates can generate large amounts of fne particulate, feces, and pseudofeces that are enriched with organic matter, resulting in intense biodeposition on sediments [12,14,15]. Large accumulations of such organic matter beneath bivalve farms can change the benthic environment, including oxygen depletion, sulfde accumulation, and nitrifcation inhibition [12,14,16].…”

Section: Introductionmentioning

confidence: 99%

Sediment Properties and Benthic Fauna Associated with Stock Enhancement and Farming of Marine Bivalve Populations in Xiangshan Bay, China

Ping

Zhang

Jiang

et al. 2023

Aquaculture Research

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This study was designed to examine the impacts of ark shell Scapharca subcrenata enhancement and suspended oyster Crassostrea sikamea farming on sediment properties and fauna communities in the benthic zone of Xiangshan Bay, China. Ark shell enhancement took place over 319 days, after which sediment samples were collected from each of the three treatment sites: the enhancement area, an oyster farm, and a control area. Sediments from the oyster farming area had significantly higher moisture and acid volatile sulfide content, and the highest Cu, Zn, Pb, and Cd concentrations in all three treatment areas. The ark shell enhancement area has the lowest total organic carbon. No significant difference was found between the mean grain size in each of the three areas. Benthic fauna communities in the ark shell enhancement area were similar to those in the control area. Among the 16 faunal taxa identified, Ruditapes philippinarum was the most abundant species, followed by Glycera onomichiensis and Musculus senhousia. Suspension feeders were not found in the sediment beneath the oyster rafts. Cluster analysis showed a distinct separation between the benthic fauna communities in the oyster farming area and the other two treatment areas. Ark shell enhancement was thus shown to have minimal impact on the benthic environment, while the raft-farmed oysters had significant effects on the sediment structure and the benthic fauna after more than ten years of farming. The differences between the impacts of ark shell enhancement and oyster farming could be attributed to the slowing of water flow caused by oyster rafts.

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Oyster culture changed the phosphorus speciation in sediments through biodeposition

Jia

Song

et al. 2023

Environmental Research

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The impact of suspended oyster farming on macrobenthic community in a eutrophic, semi-enclosed bay: Implications for recovery potential

Cited by 7 publications

References 49 publications

Dissolved Inorganic Nutrient Biogeochemistry in an Urbanized Coastal Region: A Study of Dapeng Cove, Shenzhen

Dissolved Inorganic Nutrient Biogeochemistry in an Urbanized Coastal Region: A Study of Dapeng Cove, Shenzhen

Sediment Properties and Benthic Fauna Associated with Stock Enhancement and Farming of Marine Bivalve Populations in Xiangshan Bay, China

Oyster culture changed the phosphorus speciation in sediments through biodeposition

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