Changes in soil and water quality at sediment–water interface of Penaeus vannamei culture pond at varying salinities

The decline of surface water quality due to excess phosphorus (P) input is a global problem of increasing urgency. Finding sustainable measures to restore the surface water quality of eutrophic lakes with respect to P, other than by decreasing P inputs, remains a challenge. The addition of iron (Fe) salts has been shown to be effective in removing dissolved phosphate from the water column of eutrophic lakes. However, the resulting changes in biogeochemical processes in sediments as well as the long-term effects of Fe additions on P dynamics in both sediments and the water column are not well understood.In this study, we assess the impact of past Fe additions on the sediment P biogeochemistry of Lake Terra Nova, a well-mixed shallow peat lake in the Netherlands. The Fe-treatment in 2010 efficiently reduced P release from the sediments to the surface waters for 6 years. Since then, the internal sediment P source in the lake has been increasing again with a growing trend over the years.In 2020, we sampled sediments at three locations in Terra Nova, of which one received two times more Fe during treatment than the other two. Sediment cores from all sites were sectioned under oxygen-free conditions. Both the porewaters and sediments were analysed for their chemical composition, with sequential extractions providing insight into the sediment forms of P and Fe. Additional sediment cores were incubated under oxic and anoxic conditions and the respective fluxes of P and Fe across the sediment water interface were measured.The results suggest that Fe and P dynamics in the lake sediments are strongly coupled. We also find that the P dynamics are sensitive to the amount of Fe supplied, even though enhanced burial of P in the sediment was not detected. The results of the sequential extraction procedure for P, which distinguishes P associated with humic acids and Fe oxides, as well as reduced flux of Fe(II) across the sediment water interface in the anoxic incubations, suggest a major role of organic matter in the interaction of Fe and P in these sediments.Further research will include investigations of the role of organic matter and sulphur in determining the success of Fe-treatment in sequestering P in lake sediments. Based on these data in combination with reactive transport modelling we aim to constrain conditions for successful lake restoration through Fe addition.

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Understanding Long-Term Baseflow Water Quality Trends Using a Synoptic Survey of the Ground Water-Surface Water Interface, Central Wisconsin

Journal of Environmental Quality ◽

10.2134/jeq2004.0134 ◽

2005 ◽

Vol 34 (3) ◽

pp. 825-835 ◽

Cited By ~ 24

Author(s):

Bryant A. Browne ◽

Nathan M. Guldan

Keyword(s):

Water Quality ◽

Surface Water ◽

Ground Water ◽

Water Surface ◽

Water Interface ◽

Water Quality Trends

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C/N Ratio and its Effect on Biofloc Development, Water Quality, and Performance of Penaeus Vannamei Juveniles High-Density-Zero-Exchange-Outdoor Tank System

Vannamei Shrimp Farming ◽

10.1201/9781003083276-10 ◽

2020 ◽

pp. 133-146

Author(s):

Wu-Jie Xu ◽

Timothy C. Morris ◽

Tzachi M. Samocha

Keyword(s):

Water Quality ◽

High Density ◽

Penaeus Vannamei ◽

Density Zero ◽

Tank System ◽

And Performance

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Soil and water quality

Water and Agricultural Sustainability Strategies ◽

10.1201/b10533-14 ◽

2010 ◽

pp. 133-141

Author(s):

K Reddy ◽

J Jawitz

Keyword(s):

Water Quality ◽

Soil And Water

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THE USE OF PATH ANALYSIS IN THE DETERMINATION OF ENVIRONMENTAL FACTOR EFFECTS ON THE TOTAL PRODUCTION OF AQUACULTURE PONDS IN PASURUAN, EAST JAVA PROVINCE

Indonesian Aquaculture Journal ◽

10.15578/iaj.10.2.2015.173-182 ◽

2016 ◽

Vol 10 (2) ◽

pp. 173

Author(s):

Andi Indra Jaya Asaad ◽

Erna Ratnawati ◽

Akhmad Mustafa

Keyword(s):

Water Quality ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Path Analysis ◽

Soil Quality ◽

Water Salinity ◽

Total Production ◽

Direct Effects ◽

Technical Application ◽

Soil And Water

Environmental factors in the form of soil and water quality are the important factors of aquaculture pond productivity, including total production (tiger shrimps, Penaeus monodon, and milkfish, Chanos chanos) in Pasuruan, East Java Province. The objective of this study was to analyze the direct or indirect effects of soil and water quality on the total production of ponds in Pasuruan using a path analysis application. Data were collected in the pond areas around Pasuruan Regency including Nguling, Lekok, Rejoso, Keraton, and Bangil Sub-Districts as well as Pasuruan City. Soil quality was determined as a free variable and exogen; water quality as mediate variable, suspended, and endogen; as well as milkfish production as suspended variable and endogen. Environmental characteristics were illustrated using descriptive statistics, while environment factor effects on total production were analyzed using path analysis. The results of path analysis show that from the 12 analyzed soil quality variables, only two variables were affected in the total production of pond (tiger shrimps and milkfish) namely: contents of soil organic carbon and soil phosphate. While based on 11 water quality variables, two variables (water salinity and water iron) were affected the total production of ponds in Pasuruan Regency. The direct effects of soil organic carbon and phosphate on the total production were 0.314 and -0.600, respectively. Water salinity and water iron gave direct effects on total production amounting to -0.678 and 0.358 respectively. It is also found that two soil variables which were affected in the total production, did not indicate the effect towards water quality in ponds. Further implication of this research is put more attention for these variables into pond’s management in order to gain more production. Technical application could be appropriate for pond preparation and frequently water changing during grow out.

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