L'eutrophisation

Pinay, Gilles; Gascuel, Chantal; Ménesguen, Alain; Souchon, Yves; Moal, Morgane Le; Levain, Alix; Étrillard, Claire; Moata, Florentina; Pannard, Alexandrine; Souchu, Philippe

doi:10.35690/978-2-7592-2757-0

Cited by 15 publications

(2 citation statements)

References 4 publications

(4 reference statements)

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“…In general, the highest values for all three pollutants were recorded at the Athiémé and Codjohoué stations, which are located in the most agricultural areas of the basin (rice and cotton growing) (Baglo, 2022). As agriculture is well known as a source of organic pollution of surface waters (Pinay et al, 2017;Chouti and Hounkpêvi, 2018;De Kinkelin and Petit, 2018), the high organic pollution at these stations would come from residues of agricultural inputs and organic matter drained by runoff water.…”

Section: Characterization Of Stations: Relationship Between Physicoch...mentioning

confidence: 99%

Physicochemical Quality of the Water and Heavy Metal Contamination of the Sediment, Water, and Flesh of Some Fish in the Lower Reaches of the Mono River (Benin, West Africa)

2024

JFE

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This study aimed to assess the physicochemical quality of the water and the heavy metal of the sediment, water, and flesh of two species of fish most commonly consumed by residents in the lower reaches of the Mono River. To this end, four stations (Ahossanou, Codjohoué, Athiémé, Grand-Popo) were selected and surveyed during high water (October to December 2021) and low water (January to March 2022) seasons to measure physicochemical parameters and examine the ichthyofauna in artisanal catches. Water samples were taken to measure the biological oxygen demand (BOD 5 ), nitrite and nitrate levels. Additionally, samples of sediment, water, and fish flesh were taken to analyze heavy metal concentrations (lead and cadmium). The BOD 5 concentrations exceeded 30 mg•L -1 , indicating poor water quality. All nitrite and nitrate levels were within acceptable limits (3.28 and 44.28 mg•L -1 , respectively). The potential ecological risk posed by sediment contamination ranged from low during high water to considerable during low water seasons. Measured lead and cadmium concentrations in the water exceeded permissible limits (0.05 and 0.005 mg•L -1 , respectively). Brycinus macrolepidotus and Chrysichthys nigrodigitatus were the most abundant fish species caught in the Mono River. While cadmium levels in the fish flesh were below the WHO/FAO standard (0.05 mg•kg -1 ), lead concentrations exceeded the WHO/FAO standard (0.3 mg•kg -1 ). The study concluded that consumption of fish from the lower Mono River poses health risks to local communities.

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Section: Characterization Of Stations: Relationship Between Physicoch...mentioning

confidence: 99%

Physicochemical Quality of the Water and Heavy Metal Contamination of the Sediment, Water, and Flesh of Some Fish in the Lower Reaches of the Mono River (Benin, West Africa)

2024

JFE

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“…Alternative P sources for mineral P fertilisers, such as organic waste products (OWPs) (urban composts) and animal manure, can help avoid a possible future shortage of P fertilisers. Environmental risks are another major issue in P management in agricultural soils (Némery & Garnier, 2007;Pinay et al, 2018;Sharpley et al, 2016). The runoff of particulate and dissolved P from elds towards water bodies can contribute to the alteration of water quality during eutrophication.…”

Section: Introductionmentioning

confidence: 99%

Mineralisation of soil organic phosphorus with different P sources: results from three long-term field experiments

Raguet,

Houot,

Montenach

et al. 2024

Preprint

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Phosphorus (P) is a major nutrient for crops, and its application to agricultural soils as inorganic or organic fertilizer is crucial for optimising P availability to plants to sustain and ensure food production. The mineralisation of soil organic phosphorus (SOP) may play a significant role in supplying plant-available P. This study aimed to determine the SOP mineralisation rate in soils cropped under contrasting agropedoclimatic conditions. The rate was determined by applying to SOP the modelling approach developed by Hénin and Dupuis in 1945 for soil organic carbon. We used three French long-term field experiments (LTFEs) on P fertilisation combining different P rates (0–112 kg P ha-1yr-1), applied for decades as superphosphate or various organic waste products (OWPs), on different soil types, and different annual crop successions. These databases include long time-series data of topsoil SOP and soil inorganic phosphorus (SIP) contents and annual crop measurements. For the three LTFEs, the initial SOP stocks were 446, 595, and 1145 kg P ha-1, the P amounts exported during harvest were 26.5, 26.6, and 25.3 kg P ha-1yr-1, and the P remaining in the topsoil as crop residues were 15.0, 14.4, and 11.5 kg P ha-1yr-1 with significant differences across yields, plant organs, and fertilisation treatments. During the post-harvest year, 2.5, 7.9, and 11.0 kg P ha-1yr-1 were incorporated into SOP by the decomposition of crop residues and OWPs. The rates of SOP mineralisation, 2.1, 5.4, and 11.2 kg P ha-1 yr-1, differed significantly across the LTFEs. The SOP stocks did not change significantly with the years of cropping and fertilisation, irrespective of P fertilisation. The SIP stocks closely corresponded to the cumulative P budget (i.e., cumulative sum of applied P – exported P).

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Assessment of Pollution by Phosphate and Nitrogen Elements from Sebou and Oum Er Rbia, Morocco

Hajjami

Souabi

Alami

2022

Advanced Intelligent Systems for Sustainable Development (AI2SD’2020)

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L'eutrophisation

Cited by 15 publications

References 4 publications

Physicochemical Quality of the Water and Heavy Metal Contamination of the Sediment, Water, and Flesh of Some Fish in the Lower Reaches of the Mono River (Benin, West Africa)

Physicochemical Quality of the Water and Heavy Metal Contamination of the Sediment, Water, and Flesh of Some Fish in the Lower Reaches of the Mono River (Benin, West Africa)

Mineralisation of soil organic phosphorus with different P sources: results from three long-term field experiments

Assessment of Pollution by Phosphate and Nitrogen Elements from Sebou and Oum Er Rbia, Morocco

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