Spatial and temporal extension of eutrophication associated with shrimp farm wastewater discharges in the New Caledonia lagoon

Thomas, Yoann; Courties, Claude; Helwe, Yasmin El; Herbland, Alain; Lemonnier, Hugues

doi:10.1016/j.marpolbul.2010.07.005

Cited by 66 publications

(48 citation statements)

References 41 publications

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“…Nonetheless, the high chl-a concentration rapidly decreased along the Selang Sibu River down to 0.919 ± 0.379 mg m -3 at the conjunction with Sibu Laut River. The observation was in good agreement with the study of Thomas et al (2010) and Trott and Alongi (2000). The decrease of the chl-a may be due to the dilution or high grazing rate of zooplankton on phytoplankton as suggested by La Rosa et al (2002).…”

Section: General Environmental Variablessupporting

confidence: 89%

“…Tidal mangrove estuaries have some capacity to process the intermittent inputs of pond-derived nutrients at least over short spatial and temporal scales. Thomas et al (2010) and Ribeiro and Kjerfve (2002) also reported similar water quality improvement with distance. The dilution factor along Selang Sibu River was varied among phosphorus species.…”

Section: General Environmental Variablesmentioning

confidence: 55%

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Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia

et al. 2014

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The concentrations of nutrients (nitrogen and phosphorus), total metals, and fecal coliform (FC) coupling with chlorophyll-a (chl-a), 5-day biochemical oxygen demand (BOD 5 ) and other general environmental parameters were evaluated at the sub-surface and near-bottom water columns of 13 stations in the Sibu Laut River during low and high slack waters. The results indicated that inorganic nitrogen (mainly nitrate) was the primary form of nitrogen whereas organic phosphorus was the major form of phosphorus. The abundance of total heavy metals in Sibu Laut River and its tributaries was in the order of Pb \ Cu \ Zn \ Cd. Fecal coliform concentration was relatively low along Sibu Laut River. The shrimp farm effluents contributed a substantial amount of chl-a, BOD 5 , nutrients, and FC to the receiving creek except for total metals. Nevertheless, the influence was merely noticeable in the intake creek and amended rapidly along Selang Sibu River and brought minimal effects on the Sibu Laut River. Besides, the domestic sewage effluents from villages nearby also contributed a substantial amount of pollutants.

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Section: General Environmental Variablessupporting

confidence: 89%

Section: General Environmental Variablesmentioning

confidence: 55%

Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia

et al. 2014

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“…The immobilized microalgae have been exploited for removing nutrient in wastewater [2,3] and have great potential to be used in marine aquaculture wastewater treatment. Effluents from aquaculture are rich in solids and dissolved nutrients, mainly in the form of inorganic nitrogen and phosphorus [4,5]. Effluents from aquaculture industry should be treated before discharge into its adjacent aquatic ecosystem to avoid eutrophication and water contamination.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Marine Microalgae Immobilization in Alginate Bead for Marine Water Treatment: Bead Stability, Cell Growth, and Ammonia Removal

Soo

Chen

Bojo

et al. 2017

International Journal of Polymer Science

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Sodium alginate is the most commonly used polymer matrix in microalgae immobilization for water treatment. However, the susceptibility of alginate matrixes to cation chelating agents and antigelling cation limits the use of alginates in estuarine and marine systems. Hence, the present study aims to investigate the stability of alginate bead in marine water and the feasibility of microalgae to grow when immobilized in alginate bead for marine water treatment. Different concentrations of alginate and hardening cation calcium were used to formulate beads. The beads were incubated in Guillard's f/2 medium and shaken vigorously by using orbital shaker for 15 days. The results indicated that bead stability was enhanced by increasing alginate and CaCl 2 concentrations. Subsequently, the marine microalga, Nannochloropsis sp., was immobilized in calcium alginate bead. The growth and ammoniacal-nitrogen (NH 4 + -N) uptake by immobilized cell were compared with free cell culture in f/2 medium. Specific growth rate of immobilized cell (0.063 hr −1 ) was significantly higher than free cell (0.027 hr −1 ). There was no significant difference on specific uptake rate of free cell and immobilized cell; but immobilized cell removed significantly more NH 4 + -N (82.2%) than free cell (47.3%) culture at the end of the experiment. The present study demonstrated the potential use of alginate immobilization technique in marine microalgae culture and water treatment simultaneously.

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“…Brazilian water quality standards for TAN and total phosphorus are ≤0.4 mg·L −1 and ≤0.12 mg·L , respectively. Various studies with monitoring of effluent and influent water quality in shrimp farms report similar results [29,38,[60][61][62][63][64]. Additionally, several researches have demonstrated effluent water from shrimp ponds typically contains elevated concentrations of dissolved nutrients compared to influent water [29,61,62,64].…”

Section: Assessment Of Water Qualitymentioning

confidence: 72%

Brackish Shrimp Farming in Northeastern Brazil: The Environmental and Socio-Economic Impacts and Sustainability

Sá¹,

Sousa²,

Rocha³

et al. 2013

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Despite the economic importance of farmed shrimp, a number of technical, environmental, economic and social problems have been widely reported in the international literature. This paper focuses on the environmental and socio-economic impacts of semi-intensive and intensive shrimp farming in the coastal region of Northeastern Brazil and the identification of options for sustainable production. In this Region, the total area dedicated to shrimp farming is approximately 18,500 ha, of which 5750 ha are located in Ceará State. The estuary of Jaguaribe river has the largest number of shrimp farms in the state of Ceará. Currently, the industry has 64 participating farms with a total area dedicated to shrimp farming of 2411.3 ha. In 2011, the total production was 13,110 tons of shrimp with an average yield of 6.3 ton ha −1 ·year −1 in a pond area of 2071.2 ha. This industry employs 2350 people that represent 23.2% of jobs generated in the two municipalities where the Jaguaribe river estuary is inserted. Compared with other countries, Brazil has reduced its exports due to high cost inputs for shrimp farming. However, the Brazilian shrimp industry has benefited from high domestic prices, despite the decreases in international price of shrimp. In 2011, the prices for size category ranged between U$ 4.67 -6.04 for 80/100 (count of head-on shrimp), U$ 4.95 -6.60 for 70/80 and U$ 5.85 -8.10 for 50/60. The major environmental impacts in this industry have focused on the water pollution and loss of mangroves. However, no change in parameters of water quality was observed during the period 2010-2012, indicating that this estuary has some capacity to process pond-derived nutrients while only 3.7 ha of mangrove forests were used to shrimp pond. The results of this investigation demonstrate that Brazilian shrimp industry requires improved management and development policy for a sustainable growth.

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Spatial and temporal extension of eutrophication associated with shrimp farm wastewater discharges in the New Caledonia lagoon

Cited by 66 publications

References 41 publications

Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia

Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia

Feasibility of Marine Microalgae Immobilization in Alginate Bead for Marine Water Treatment: Bead Stability, Cell Growth, and Ammonia Removal

Brackish Shrimp Farming in Northeastern Brazil: The Environmental and Socio-Economic Impacts and Sustainability

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