Coastal pollution due to increasing nutrient flux in aquaculture sites

David, Clarissa C.; Maria, Yvainne Yacat-Sta.; Siringan, Fernando P.; Reotita, Joan; Zamora, Peter B.; Villanoy, Cesar L.; Sombrito, Elvira Z.; Azanza, Rhodora V.

doi:10.1007/s00254-008-1516-5

Cited by 39 publications

(23 citation statements)

References 27 publications

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“…They also reported continuous increases in the P concentration after installing it in shrimp farms. Increasing P concentrations have also been recorded from five major aquaculture sites in the Philippines (David et al, 2009). Distribution along dated sediment cores provided evidence similar to our study showing aquaculture as recent, but already responsible for a significant part of the P contribution, relative to other anthropogenic sources and probably responsible for the increase in P concentrations observed in the sediments in the estuary.…”

Section: Resultssupporting

confidence: 72%

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Anthropogenic sources and distribution of phosphorus in sediments from the Jaguaribe River estuary, NE, Brazil

Marins¹,

Filho²,

Eschrique³

et al. 2011

Braz. J. Biol.

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This paper estimates annual P emission to the Jaguaribe River estuary, NE Brazil, responsible for approximately 30% of the country's farmed shrimp production. Emissions increased three times between 2001 and 2006 and reached 43.9 t.year -1. These emissions make aquaculture the third main source of P for this estuary and are much smaller than emissions from agricultural sources and slightly lower than emissions from wastewater. Their relative contribution also increased from 10.5% to 20.5%. Temporal variability of P concentrations in estuarine bottom sediments also suggest an increase, but not as evident as the emissions. The spatial distribution and speciation of P (total P and inorganic P) in sampling stations located upstream and downstream from the main aquaculture area confirmed the importance of this source. Inorganic P was the dominant form present in sediments downstream and showed an increase from 67% to 75% of the total P present in the sediment.Keywords: nutrients, emission, estuary, shrimp culture, wastewaters. Emissão e distribuição de fósforo de fontes antrópicas no estuário do rio Jaguaribe, Nordeste do BrasilResumo É apresentada uma estimativa da emissão anual de P para o estuário do rio Jaguaribe, Ceará, Nordeste do Brasil, área responsável por cerca de 30% da produção total de camarão cultivado no país. As emissões aumentaram por um fator de três entre 2001 e 2006, atingindo 43,9 t.year -1 . Essa emissão coloca a aquacultura como a terceira fonte principal de P para esse estuário, sendo bem menor que a emissão de fontes agrícolas e um pouco menor que as emissões por águas servidas. A contribuição relativa da aquacultura também aumentou de 10,5% a 20,5%, no mesmo período. A variação temporal das concentrações de P em sedimentos estuarinos sugere um aumento no período, porém não tão evidente quanto das emissões. A distribuição espacial e a especiação do P (P total e P inorgânico) em estações de coleta localizadas à montante e à jusante da principal área de aquacultura confirmaram a importância desta fonte. O P inorgânico foi a forma dominante presente em sedimentos à jusante e mostrou um aumento de 67% a 75% do total de P presente no sedimento.Palavras-chave: nutrientes, emissão, estuário, carcinicultura, águas servidas.

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Section: Resultssupporting

confidence: 72%

“…Most other emissions go firstly to soils before eventually reaching the estuarine waters (David et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

Anthropogenic sources and distribution of phosphorus in sediments from the Jaguaribe River estuary, NE, Brazil

Marins¹,

Filho²,

Eschrique³

et al. 2011

Braz. J. Biol.

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“…These effects and their consequences have attracted recently the attention of researchers all over the world (David et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ecological Studies of Epiphytic Microalgae and Epiphytic Zooplankton on Seaweeds of the Eastern Harbor, Alexandria, Egypt

El-Din¹,

Shaltout²,

Nassar³

et al. 2015

American Journal of Environmental Sciences

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Abstract:A qualitative and quantitative study on the epiphytic microalgae and epiphytic zooplankton were conducted in order to follow up their community structures on seaweeds in relation to some physicochemical variables in the coastal waters of the Eastern Harbor of Alexandria. Water and macroalgal samples were collected seasonally during two years successively: Winter, summer, autumn (2012) and spring (2013). The collected seaweeds were Ulva fasciata (green alga), Corallina mediterranea, Corallina officinalis, Gelidium sp., Pterocladiella capillacea, Hypnea musciformis and Grateloupia doryphora (red algae). The studied water quality parameters were pH, salinity, dissolved oxygen, oxidizable organic matter and nutrient salts. The abundance of epiphytes were significantly different between morphotypes (two-way ANOVA), p≤0.05; ranking the branched thalli as the first preference for microalgal epihytes, sheet-like thalli with a smooth surface as the second one, while the lowest rank was for the mucilaginous species. The same result was found for epiphytic zooplankton. The results of the statistics revealed insignificant seasonal variations in the epiphytic microalgae and very weak correlations between the abundance of microalgae and the physico-chemical parameters. In contrast, there were significant differences for epiphytic zooplanktonic seasonal variations. Whereas, the zooplankton count was correlated preferably with environmental water salinity, followed by nutrients.

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“…These discharged nutrients lead to oxygen de pletion, water deterioration, and eutrophication ag gravation of aquacultural regions as well as their adjacent waters (Alongi et al 2003). This fact is especially true in weak water-exchange semi-closed fiords with high culture density, wherein net culture is prone to inducing red tides (David et al 2009). Unfortunately, fish cages in China are mostly located in semi-closed bays, and the fish are usually fed with excessive amounts of fresh trash fish and formulated diets for high yield.…”

Section: Evaluation and Suggestions For The 3 Cultivation Typesmentioning

confidence: 99%

Phytoplankton community distribution in relation to environmental parameters in three aquaculture systems in a Chinese subtropical eutrophic bay

Jiang¹,

Chen²,

Zeng³

et al. 2012

Mar. Ecol. Prog. Ser.

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There is concern about the impact of expanding coastal aquaculture activity, particularly in China, with the biggest aquaculture industry in the world. We conducted 3 cruises to the oyster, kelp and fish farms of the Xiangshan Bay during the winter−spring transition (02/2009), winter (01/2010) and spring (04/2010). Our aim was to explore the spatial heterogeneity of the phytoplankton community in different culture habitats and evaluate the effects of mariculture on phytoplankton. Different culture types formed unique small-scale habitats that exhibited various en vironmental gradients and forms of phytoplankton community patchiness. Both environmental (i.e. temperature, salinity, transparency, suspended solids, dissolved oxygen, pH, dissolved inorganic nitrogen, PO 4 -P, SiO 3 -Si, N/P, and total organic carbon) and phytoplankton (i.e. cell density, chlorophyll a, species richness, main dominant species, and community structure) parameters were significantly different among the 3 culture habitats. Canonical correspondence analysis showed that phytoplankton distribution was mainly influenced by temperature, nutrition, salinity and suspended solids. Oyster and kelp farming effectively alleviated coastal eutrophication and also increased species richness and diversity; fish farming did not. Temperature elevation caused by the thermal discharge from a power plant induced phytoplankton blooms during the winter and winter−spring transition. Nevertheless, the filtering effect of suspended oysters dramatically reduced microalgal biomass. The kelp and oyster farms were much better than the fish farm in terms of water quality, phytoplankton composition, and habitat restoration function. These results provide guidelines for future policy-making in aquaculture as well as eutrophication control and management.

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Coastal pollution due to increasing nutrient flux in aquaculture sites

Cited by 39 publications

References 27 publications

Anthropogenic sources and distribution of phosphorus in sediments from the Jaguaribe River estuary, NE, Brazil

Anthropogenic sources and distribution of phosphorus in sediments from the Jaguaribe River estuary, NE, Brazil

Ecological Studies of Epiphytic Microalgae and Epiphytic Zooplankton on Seaweeds of the Eastern Harbor, Alexandria, Egypt

Phytoplankton community distribution in relation to environmental parameters in three aquaculture systems in a Chinese subtropical eutrophic bay

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