Use of new microbiotests with Daphnia magna and Selenastrum capricornutum immobilized forms

Cerejeira, Maria José; Pereira, Teresa; Silva‐Fernandes, A.

doi:10.1016/s0045-6535(98)00335-x

Cited by 21 publications

(8 citation statements)

References 4 publications

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“…In Portugal, various studies have been carried out over the past decades to assess the impact of pesticides used in agricultural areas of the 'Baixo Sado', 'Mondego' and 'Ribatejo e Oeste' regions on the quality of groundwater (Batista et al 2001(Batista et al , 2002Batista 2003;Cerejeira 1993;Cerejeira et al 1995aCerejeira et al , b, 2000Cerejeira et al , 2003Francés et al 2001;Silva et al 2006) and surface water bodies, including the evaluation of effects on aquatic biota (Cerejeira et al 1998(Cerejeira et al , 1999Pereira et al 2000a, b;Pereira 2003). However, no detailed studies have been performed so far in the Portuguese vineyard environment.…”

Section: Introductionmentioning

confidence: 99%

Integrated approach for the quality assessment of freshwater resources in a vineyard area (South Portugal)

Silva¹,

Batista²,

Caetano³

et al. 2010

Environ Monit Assess

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An integrated chemical and biological approach for the quality assessment of freshwater resources in a vineyard area of the 'Alentejo' region (South Portugal) is presented. This includes analysis to 11 pesticide compounds and whole toxicity testing on algae and crustaceans. Simazine, terbuthylazine, terbutryn, desethylatrazine and chlorpyrifos were the most frequently detected pesticides in water collected from wells and drainage channels. Mixtures of up to three compounds in different qualitative combinations were also found. The quality standards for individual pesticides (0.1 μg L(-1)) and pesticides-total (0.5 μg L(-1)) were exceeded in some samples. However, their maximum concentrations were lower than the WHO guidelines, the USEPA health advisory values and the environmental quality standards for priority substances applicable to surface water. In five samples, the herbicides terbuthylazine and terbutryn and the insecticide chlorpyrifos did not pass the toxicity exposure ratio (TER) trigger values specified for aquatic organisms (algae, Daphnia and fish). Maximum toxic effects on Daphnia magna (100%) and Pseudokirchneriella subcapitata (82.56%) were determined in groundwater samples, while in surface water, no toxicity was observed. Concerning effects on Heterocypris incongruens in sediment samples collected at the drainage channels, mortality and growth inhibition values were below 38%. Pro-active management of the use of pesticides is recommended for implementing at the farm and catchment level to reduce inputs into ground- and surface water.

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Section: Introductionmentioning

confidence: 99%

Integrated approach for the quality assessment of freshwater resources in a vineyard area (South Portugal)

Silva¹,

Batista²,

Caetano³

et al. 2010

Environ Monit Assess

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“…The high quantity of material in suspension may have affected B. calyciflorus survival, as was already pointed out to D. magna in other studies [7,10]. In spite of rotifers being considered one of the less sensitive organisms to organophosphorus compounds a previous application of clorfenvinphos carried out by the farmer in rice plot 2 to control Chironomus spp.…”

Section: Rotoxkit F™mentioning

confidence: 87%

“…201 (9), respectively. Test methods with Daphnia magna and Selenastrum capricornutum were already described in Cerejeira et al (1997) [7].…”

Section: Test Methodsmentioning

confidence: 99%

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Preliminary toxicity evaluation of water from rice fields using cost‐effective microbiotests

Cerejeira

Pereira

Silva‐Fernandes

et al. 1999

Toxicological & Environmental Chemistry

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A study was performed in a Protected Area (Natural Reserve of Sado Estuary) in 1996, to evaluate the acute toxicity for aquatic life of surface water from rice fields treated with pesticides, particularly with molinate and quinclorac. As a preliminary assessment, the following rapid toxicity tests were used: "Rotoxkit F", "Thamnotoxkit F" and the recently introduced "Daphtoxkit F magna" and "Algaltoxkit F". Water samples were collected from: a water source for irrigating the rice fields, two rice plots, a drainage channel and from Sado river in which the water is discharged. The results showed that samples from the rice plot treated with molinate were more toxic than those obtained from rice plot treated with quinclorac. Water samples from the river were the most toxic, causing 100% of immobility in all organisms and a substantial inhibition in the algal growth. Water collected from the drainage channel in late July, was also found to be quite toxic. The results obtained until now indicate that some characteristics of these microbiotests, like their rapidity, simplicity and relatively low cost, make them a practical tool to evaluate acute effects of pesticides in freshwater ecosystems. They may also contribute to suggest some changes in pesticides use to promote agricultural practices with lower impact to aquatic life.

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“…The irrigation system of rice fields enhances the likelihood of the transport of agrochemicals (either fertilisers or pesticides) to the surrounding irrigation/ drainage channels and waterways via run-off, direct overspray, aerial spray drift, accidental spills and leaching (Albanis et al 1998;Cerejeira et al 1998Cerejeira et al , 2003Sabater and Carrasco 2001;Miao et al 2003;Sánchez et al 2004;Phyu et al 2005;van Wijngaardrn et al 2005;Padovani et al 2006). Hence, nontarget species in the vicinity of this kind of agricultural areas are potentially at risk (Sabater and Carrasco 1998;Geoffroy et al 2004;Ma 2005;Phyu et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Are Pseudokirchneriella subcapitata and Chlorella vulgaris Affected by Environmental Samples from a Rice Field?

Marques

Abrantes

Figueiredo

et al. 2007

Water Air Soil Pollut

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Rice fields represent important production rates in Portugal. However, the intensive soil management and the exploitation of agrochemicals may pose a threat to nontarget organisms. Hence, the present work regards the toxicity screening of surface waters and sediment elutriates collected during the drainage of fields in the vicinity of a rice paddy (Quinta do Seminário, Soure, Portugal): 1. in River Pranto (RP), the river from which the field irrigation water is canalized; 2. inside the rice paddy, from the main drainage channel -Vala de Enxugo (VE). For that purpose, it was used a combination of physicochemical analyses and bioassays with two green algae species -Pseudokirchneriella subcapitata and Chlorella vulgaris. The chemical screening showed an apparent absence of xenobiotics in sediment samples, while no pesticides were found within the chemical contaminants detected in water samples. The nutrient load reflected low levels of inorganic contamination. Bioassays revealed that P. subcapitata was more sensitive to the overall physico-chemical conditions in natural samples than C. vulgaris, being its growth inhibited under water samples from both sites. On a whole, water samples, mainly those from the main irrigation/drainage channel of the rice fields (VE), were more deleterious to microalgae than those from RP or any of the elutriates.

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Use of new microbiotests with Daphnia magna and Selenastrum capricornutum immobilized forms

Cited by 21 publications

References 4 publications

Integrated approach for the quality assessment of freshwater resources in a vineyard area (South Portugal)

Integrated approach for the quality assessment of freshwater resources in a vineyard area (South Portugal)

Preliminary toxicity evaluation of water from rice fields using cost‐effective microbiotests

Are Pseudokirchneriella subcapitata and Chlorella vulgaris Affected by Environmental Samples from a Rice Field?

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