Is halophyte species growing in the vicinity of the shrimp ponds a promising agri-aquaculture system for shrimp ponds remediation in New Caledonia?

Colette, Marie; Guentas, Linda; Gunkel-Grillon, Peggy; Callac, Nolwenn; Patrona, Luc Della

doi:10.1016/j.marpolbul.2022.113563

Cited by 9 publications

(11 citation statements)

References 68 publications

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“…Finally, the conservation of mangrove systems is not guaranteed. These systems provide services that benefit shrimp farmers due to their ability to remove excess organic compounds in the vicinity of shrimp farm drainage, functioning as biofilters [100][101][102][103]. Hence, the involvement of the shrimp sector in the development of applied research and local strengthening actions (i.e., support for the training of local professionals, support for communities in their area of influence in mangrove reforestation) is necessary.…”

Section: Discussionmentioning

confidence: 99%

Water and Sediment Quality Changes in Mangrove Systems with Shrimp Farms in the Northern Ecuadorean Coast

Rebolledo Monsalve,

Verduga Vergara

2023

Applied Sciences

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The environmental quality of mangroves is influenced by multiple factors, among which shrimp aquaculture currently plays a major role. This study describes the alterations of natural conditions of mangrove systems that house shrimp farms in the northern Ecuadorean coast. Water, sediment quality and the structure of benthic assemblages of four sectors with different proportions of mangroves and shrimp ponds are described. The samples were collected at the confluence of mangrove drainages or tidal creeks, as well as in the modified drainages for shrimp farm infrastructures towards navigable channels, during the dry and rainy seasons. Shrimp farm drainage water had a 17% higher dissolved oxygen concentration and 2.5 times higher total ammonium and phosphorus compared to mangrove drainage water. The sediment in the latter decreased their total organic matter and nitrogen content by 44% and 53%, respectively, slightly increasing the pH level and increasing the ammonium content by 93%. Furthermore, the redox profiles were different between the types of drainages. The soft-bottom benthic assemblages involved 56 species in the study area and exhibited a variety of sectoral structures, with better indicators of ecological status in sectors with fewer shrimp farms. Finally, improvements are suggested for monitoring the environmental quality of shrimp farms in Ecuadorean mangrove systems.

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Section: Discussionmentioning

confidence: 99%

Water and Sediment Quality Changes in Mangrove Systems with Shrimp Farms in the Northern Ecuadorean Coast

Rebolledo Monsalve,

Verduga Vergara

2023

Applied Sciences

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“…The efficiency of halophyte bioremediation has been proven in aquaponics and sand-substrate systems, with significant removal of aquaculture wastes [ 14 , 15 ]. Integrated shrimp-plant culture is a topic of recent interest and shrimp-vegetable rotational farming system with vegetable culture in tidal ponds during the idle period may be an efficient way to reduce nutrient accumulation in ponds sediments during shrimp rearing [ 11 , 16 , 17 ]. In the soil, most nutrients, such as N, P and S, are bound to organic molecules and are minimally bioavailable to plants.…”

Section: Introductionmentioning

confidence: 99%

Dynamic of active microbial diversity in rhizosphere sediments of halophytes used for bioremediation of earthen shrimp ponds

Colette

Guentas

Patrona

et al. 2023

Environmental Microbiome

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Background In New-Caledonia, at the end of each shrimp production cycle, earthen ponds are drained and dried to enhance microbial decomposition of nutrient-rich waste trapped in the sediment during the rearing. However, excessive ponds drying may not be suitable for the decomposition activities of microorganisms. Halophytes, salt tolerant plants, naturally grow at vicinity of shrimp ponds; due to their specificity, we explored whether halophytes cultivation during the pond drying period may be suitable for pond bioremediation. In addition, plants are closely associated with microorganisms, which may play a significant role in organic matter decomposition and therefore in bioremediation. Thus, in this study we aimed to determine the impact of 3 halophyte species (Suaeda australis, Sarcocornia quinqueflora and Atriplex jubata) on active sediment microbial communities and their implications on organic matter degradation. Results Drying significantly decreased the microbial diversity index compared to those of wet sediment or sediment with halophytes. Microbial profiles varied significantly over time and according to the experimental conditions (wet, dry sediment or sediment with halophyte species). Halophytes species seemed to promote putative microbial metabolism activities in the sediment. Taxa related to nitrogen removal, carbon mineralisation, sulphur reduction and sulphide oxidation were significant biomarkers in sediment harbouring halophytes and may be relevant for bioremediation. Whereas microbial communities of dry sediment were marked by soil limited-moisture taxa with no identification of microbial metabolic functions. Nitrogen reduction in sediments was evidenced in wet sediment and in sediments with halophytes cultures, along with putative microbial denitrification activities. The greatest nitrogen reduction was observed in halophytes culture. Conclusion The efficiency of sediment bioremediation by halophytes appears to be the result of both rhizosphere microbial communities and plant nutrition. Their cultures during the pond drying period may be used as aquaculture diversification by being a sustainable system.

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“…In New Caledonia, salt tolerant plants called halophytes such as glasswort ( Sarcocornia quinqueflora ), austral seablite ( Suaeda australis ) and sea purslane ( Sesuvium portulacastrum ) grow naturally at the vicinity of the shrimp farms (e.g., on the dikes of earthen-ponds) ( Colette et al, 2022 ). In addition, halophytic species rapidly colonize pond sediments when they are abandoned or left empty for several months (Della Patrona, personal communication).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, halophytic species rapidly colonize pond sediments when they are abandoned or left empty for several months (Della Patrona, personal communication). Thus, the cultivation of halophytes has recently been explored as a means of improving the quality of pond bottoms by reducing the organic waste accumulated in the sediments at the end of a shrimp rearing cycle ( Colette et al, 2022 , 2023 ). The integration of plant cultivation into aquaculture farming systems to limit eutrophication of the aquaculture ecosystem use waste product derived from aquaculture activities to produce plant biomass, and therefore reduce waste concentrations in farming system (e.g., water or sediment) ( Miranda et al, 2008 ; Mariscal-Lagarda et al, 2014 ; Mariscal-Lagarda and Páez-Osuna, 2014 ; Yaobin et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Suaeda australis and its associated rhizosphere microbiota: a comparison of the nutrient removal potential between different shrimp farm sediments in New Caledonia

Colette,

Guentas,

Della Patrona

et al. 2023

Front. Microbiol.

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Shrimp rearing generate organic waste that is trapped in the pond sediment. In excess, these wastes may impair aquaculture ecosystem and shrimps’ health. To promote the biological oxidation of accumulated organic waste, the pond is drained and dried at the end of each production cycle. However, this practice is not always conducive to maintaining microbial decomposition activities in sediments. Shrimp production in New Caledonia is no exception to this problem of pollution of pond bottoms. One promising way of treating this waste would be bioremediation, using a native halophyte plant and its microbiota. Thus, this study explored the nutrient removal potential of Suaeda australis and its microbiota on sediments from four shrimp farms. Suaeda australis was grown in an experimental greenhouse for 6 months. In order to mimic the drying out of the sediments, pots containing only sediments were left to dry in the open air without halophytes. An analysis of the chemical composition and active microbiota was carried out initially and after 6 months in the sediments of the halophyte cultures and in the dry sediments for each farm, respectively. In the initial state, the chemical parameters and the microbial diversity of the sediment varied considerably from one farm to another. Growing Suaeda australis reduced the nitrogen, phosphorus and sulfur content in all type of sediment. However, this reduction varied significantly from one sediment to another. The rhizosphere of Suaeda australis is mainly composed of micro-organisms belonging to the Alphaproteobacteria class. However, the families recruited from this class vary depending on the farm in question. Depending on the sediment, the variation in microbiota leads to different putative biochemical functions. For two of the farms, a similar reduction in nitrogen concentration was observed in both dry and cultivated sediments. This suggests that certain initial chemical characteristics of the sediments influence the nutrient removal efficiency of Suaeda australis. Our study therefore highlights the need to control the pH of sediments before cultivation or in dry sediments in order to ensure optimal microbial decomposition of organic waste and nutrient cycling.

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Is halophyte species growing in the vicinity of the shrimp ponds a promising agri-aquaculture system for shrimp ponds remediation in New Caledonia?

Cited by 9 publications

References 68 publications

Water and Sediment Quality Changes in Mangrove Systems with Shrimp Farms in the Northern Ecuadorean Coast

Water and Sediment Quality Changes in Mangrove Systems with Shrimp Farms in the Northern Ecuadorean Coast

Dynamic of active microbial diversity in rhizosphere sediments of halophytes used for bioremediation of earthen shrimp ponds

Suaeda australis and its associated rhizosphere microbiota: a comparison of the nutrient removal potential between different shrimp farm sediments in New Caledonia

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