Marine phytoplankton assays: Effects of detergents

Aidar, Elizabeth; Sigaud-Kutner, Teresa C. S.; Nishihara, Linda; Schinke, Katya Patrícia; Braga, Maria Cristina Célia; Farah, Roberto E.; Kutner, M B B

doi:10.1016/0141-1136(96)00002-5

Cited by 16 publications

(6 citation statements)

References 8 publications

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“…Mullets exposed for 72 h to the concentration of 2.5 mgL -1 practically could not swim at 15 cm.s -1 anymore. This verification was very disquieting considering that higher concentrations of anionic tensoatives were found in studies performed on the Brazilian coast (Aidar et al, 1997). Besch et al (1977) demonstrated that the capacity of swimming of carps provides fast indication of the toxicity.…”

Section: Discussionmentioning

confidence: 99%

Use of metabolism and swimming activity to evaluate the sublethal toxicity of surfactant (LAS-C12) on Mugil platanus

Barbieri

2007

Braz. arch. biol. technol.

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Section: Discussionmentioning

confidence: 99%

Use of metabolism and swimming activity to evaluate the sublethal toxicity of surfactant (LAS-C12) on Mugil platanus

Barbieri

2007

Braz. arch. biol. technol.

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“…1). The mangrove forest surrounding Olaria Creek is periodically exposed to anthropogenic discharges from suburban parts of Cananéia City, while no such exposure occurs at Nobrega Creek (Aidar et al 1997, Barcellos et al 2005. The mangrove forest along both creeks is dominated by 3 mangrove species (Laguncularia racemosa, Rhizophora mangle and Avicennia schauerianna; Schaeffer-Novelli et al 1990).…”

Section: Study Sitesmentioning

confidence: 99%

Pneumatophores and crab burrows increase CO2 and CH4 emission from sediments in two Brazilian fringe mangrove forests

Kristensen

Valdemarsen

Moraes

et al. 2022

Mar. Ecol. Prog. Ser.

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We assessed the release of greenhouse gases (CO2 and CH4) from air-exposed sediments and dissolved inorganic carbon (DIC) from inundated sediments in 2 Brazilian mangrove forests. Our focus was on the impact of biogenic structures, i.e. pneumatophores and crab burrows, on greenhouse gas emissions. Emission of CO2 from air-exposed bare sediment (111-156 and 57-148 mmol m-2 d-1 in darkness and in light, respectively) was comparable to DIC release from inundated sediment (122-158 and 52-62 mmol m-2 d-1, respectively). Pneumatophores and crab burrows increased dark CO2 emission during air exposure by 113-123 and 49-91%, respectively. CH4 emission from air-exposed bare sediment (0.22-0.25 mmol m-2 d-1) was increased 92-137 and 288-607%, respectively, by pneumatophores and burrows. Carbon loss in the form of CO2 and DIC from sediments with biogenic structures can at the two study locations be extrapolated to 64.1 and 71.0 mol C m-2 yr-1. These values fit well with literature values of litterfall in the studied area, providing carbon accretion of 28.5 and 21.6 mol C m-2 yr-1. However, the budget will be unbalanced if the role of biogenic structures is not considered. In the presence of biogenic structures, CH4 emissions of 2.8 and 3.3 mol C m-2 yr-1 (when converted to CO2 units) will partly (10-15%) counteract the climate mitigation effect of the accumulated carbon. Carbon budgets in mangrove sediments may therefore be flawed if the contribution of biogenic structures to greenhouse gas emissions is ignored.

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“…The present study complements Camargo et al by bringing more data regarding the pollution of the estuary using surfactants as an indicator of anthropogenic contamination in different seasons. Studies using chromatography to evaluate linear alkylbenzene (LAB) concentration of marine sediment from the coast of São Paulo found concentrations of 13-28 ng g À1 in the São Sebastião Channel, where the C 10 C 14 LAB (Aidar et al, 1997). However, a regionalscale assessment of the environmental impacts of surfactants has not yet been possible as it becomes highly complex due to the innumerable variables that can affect the dynamics of anionic surfactants in aquatic ecosystems (Aidar et al, 1997).…”

Section: Resultsmentioning

confidence: 99%

“…Studies using chromatography to evaluate linear alkylbenzene (LAB) concentration of marine sediment from the coast of São Paulo found concentrations of 13-28 ng g À1 in the São Sebastião Channel, where the C 10 C 14 LAB (Aidar et al, 1997). However, a regionalscale assessment of the environmental impacts of surfactants has not yet been possible as it becomes highly complex due to the innumerable variables that can affect the dynamics of anionic surfactants in aquatic ecosystems (Aidar et al, 1997). The composition of organic substances with negative ions dominates the concentration of surfactants in surface water and sediments, as demonstrated by previous studies (Hanif et al, 2009(Hanif et al, , 2011Roslan et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Surfactants in sediment of Itanhaém Estuary, São Paulo, Brazil

Cesar-Ribeiro

Prado

Rosa

2021

J Surfact & Detergents

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This study investigated surfactant levels in the sediment of Itanhaém Estuary through colorimetric methods with methylene blue active substances (MBAS). Samples were collected with a Van Veen bottom sampler at eight sampling points during autumn, winter, and spring of 2015. The results demonstrate growing detergent deposition in the sediment of the estuary. Surfactant concentration was higher (16.18 μg MBAS g À1 ) around the sewage treatment plant (STP) than in the estuary in autumn, after the vacation/summer season when the population of the city had increased due to tourism. There was a significant (p < 0.05) reduction in detergent concentration (to 14.94 μg MBAS g À1 ) in winter, after school vacation, while in spring the surfactants concentration for the STP was high only for the sampling points nearer the ocean. Surfactant concentrations differed significantly among sampling points (p < 0.05), with them being higher at those closer to the STP. Enrichment with high loads from anthropogenic sources associated with urbanization and tourism was responsible for the greater surfactant concentrations in areas near the STP. In conclusion, more efficient treatment of domestic effluent of the city of Itanhaém is needed, as is the control of clandestine discharge into the river since the accumulation of detergents in sediment can have harmful effects on aquatic life.

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Marine phytoplankton assays: Effects of detergents

Cited by 16 publications

References 8 publications

Use of metabolism and swimming activity to evaluate the sublethal toxicity of surfactant (LAS-C12) on Mugil platanus

Use of metabolism and swimming activity to evaluate the sublethal toxicity of surfactant (LAS-C12) on Mugil platanus

Pneumatophores and crab burrows increase CO2 and CH4 emission from sediments in two Brazilian fringe mangrove forests

Surfactants in sediment of Itanhaém Estuary, São Paulo, Brazil

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