Sediment-focused environmental impact of long-term large- scale marine bivalve and seaweed farming in Sungo Bay, China

Zhang, Jihong; Hansen, Pia Kupka; Wu, Wenguang; Liu, Yi; Sun, Ke; Zhao, Yunxia; Li, Yunchen

doi:10.1016/j.aquaculture.2020.735561

Cited by 12 publications

(11 citation statements)

References 33 publications

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“…Results of control samples for the Group 2 parameters of DSC farm (a) and TSC farm (b, data referring to Zhang et al, 2020), in which the scores are allocated to each pH and redox potential. Different coloured marks represent the results of different investigating seasons…”

Section: Resultsmentioning

confidence: 99%

“…Hydrodynamic models for the DSC fish farm located in the offshore area of Jiaozhou Bay indicate that the tidal current in the culture area is generally 0.5–1.0 m s −1 (Zhao, Zhang, Wu, et al, 2020). For benthic environments, bottom layer flow is an especially important factor as this controls the resuspension and the dispersion of bio‐deposits over long distances (Zhang et al, 2020). Conversely, the Sungo Bay TSC fish farm is located near the coastline (Figure 1d).…”

Section: Discussionmentioning

confidence: 99%

“…Except the 10 stations around the TSC farm, the same parameters in the three control stations have been sampled during the four seasons (Figure 1d, Zhang et al, 2020, Station 5, 7 and 10). The three stations can represent the baseline benthic environmental conditions.…”

Section: Methodsmentioning

confidence: 99%

“…The sediment was then sieved through a 1-mm mesh sieve, and the macrofauna were collected. (Zhang et al, 2020;…”

Section: Sample Collection and Measurementmentioning

confidence: 99%

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Benthic environmental impact of deep sea cage and traditional cage fish mariculture in Yellow Sea, China

Zhao

Zhang

et al. 2021

Aquaculture Research

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Using the Modelling-Ongrowing fish farms-Monitoring B investigation system (MOM-B), we discussed the effects of deep sea cage (DSC) and traditional sea cage (TSC) fish mariculture on benthic environments in the Yellow Sea, China. Macrofauna, and chemical and sensory parameters were evaluated at 10 field stations surrounding a traditional sea cage farm in 2016-2017 and 10 field stations surrounding a deep sea cage farm in 2018-2019. Benthic macrofauna were found in all samples, and biological parameters were universally rated acceptable or better. In spring and winter, the pH and redox potential values near the DSC farm were within the score 0, while in summer and autumn, values were within the score 1. In TSC farm, most scores were in the score 0 in spring and autumn and in the score 1 in summer. Chemical parameter results showed the DSC and TSC farms were all in condition 1, whereas the sensory parameters near the DSC farm were in condition 1, and the TSC farm in condition 2.Finally, the results demonstrate benthic environments near the DSC farm were better than those near the TSC farm. MOM-B system provides a practical environmental assessment tool that is simple, cheap and easy to implement and can be performed by moderately trained personnel.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The sediment was then sieved through a 1-mm mesh sieve, and the macrofauna were collected. (Zhang et al, 2020;…”

Section: Sample Collection and Measurementmentioning

confidence: 99%

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Benthic environmental impact of deep sea cage and traditional cage fish mariculture in Yellow Sea, China

Zhao

Zhang

et al. 2021

Aquaculture Research

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“…Further, big losses of kelp biomass represent a risk regarding profitability of the kelp cultivation business. Despite this potential for loss of kelp biomass, researchers who have studied the seafloor underneath kelp farms, have not found marked negative environmental effects from intensive kelp farming (Zhang et al, 2009(Zhang et al, , 2020Liu et al, 2016). The question that therefore arises is whether the magnitude and fate of kelp detritus that is exported from kelp rigs has been estimated correctly or if the biomass is transported with the water currents away from the rigs, and is dispersed and deposited over large areas, as has been suggested by Wernberg and Filbee-Dexter (2018).…”

Section: Introductionmentioning

confidence: 99%

Erosion Dynamics of Cultivated Kelp, Saccharina latissima, and Implications for Environmental Management and Carbon Sequestration

et al. 2021

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A growing trend of interest for the cultivation of kelp is driven by predictions for high global demands of important commodities, which require the development of alternative supplies of natural resources. In this study the dynamics of loss of biomass from cultivated Saccharina latissima were studied from February to August 2018 at two kelp farms in Northern (69°45.26′N/019°02.18′E) and in Mid-Norway (63°42.28′N/08°52.23′E). Kelp fronds at each farm were individually followed throughout the growing season. Sectional regression was applied for conversion of measured frond lengths to estimated dry weights. The study shows that between 40 and 100% of all individuals in the studied kelp population constantly eroded slightly from their distal ends. However, until June the accumulated loss was only 8% of produced dry weight. Due to dislodgement of whole sporophytes this picture changed in July and August to heavy losses in Mid-Norway. Thus, the overall losses of kelp in terms of accumulated dry weight were only 8–13% of the gross growth until harvest in June in Mid-Norway and August in Northern Norway. Losses increased significantly in Mid-Norway during July and reached 49.4% of the annual production in August. The rates of losses were separated into specific erosion and dislodgement rates. Erosion rates over the whole experimental period for the two sites were not significantly different, while differences in dislodgement rates between farm sites proved to be highly significant. The exported annual amount of carbon was estimated on the basis of lost and measured carbon content in the tissue. From these data a scenario was built for a commercial Norwegian kelp farm growing S. latissima showing a carbon export of 63–88 g C m–2y–1. This is eight times less than has been reported from scenarios for kelp farms in China. This study confirms that optimal timing of harvest is the most important management tool for avoidance of heavy losses from kelp farms. In conclusion, an industry with early harvest will likely have a low carbon export, while a late-harvested bulk production could export four to six times as much carbon with an increased potential for carbon sequestration.

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The impact of fish farming on phosphorus loading of surface sediment in coastal complex aquaculture

et al. 2023

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Sediment-focused environmental impact of long-term large- scale marine bivalve and seaweed farming in Sungo Bay, China

Cited by 12 publications

References 33 publications

Benthic environmental impact of deep sea cage and traditional cage fish mariculture in Yellow Sea, China

Benthic environmental impact of deep sea cage and traditional cage fish mariculture in Yellow Sea, China

Erosion Dynamics of Cultivated Kelp, Saccharina latissima, and Implications for Environmental Management and Carbon Sequestration

The impact of fish farming on phosphorus loading of surface sediment in coastal complex aquaculture

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