Fulvic acid in microlayer waters of the Gerlache Inlet Sea (Antarctica): Their distribution in dissolved and particulate phases

Calace, N.; Catrambone, T.; Petronio, B.M.; Pietroletti, Marco

doi:10.1016/j.watres.2006.08.031

Cited by 13 publications

(2 citation statements)

References 25 publications

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“…Similar observations or low enrichment factors in the SML have been made in several previous studies on oceanic, coastal and lake waters (Gasparovic et al 2007, Wurl & Holmes 2008, Baastrup-Spohr & Staehr 2009). More significant enrichments of SML were observed previously for a series of organic compounds such as dissolved and particulate fulvic acid (Calace et al 2007); transparent exopolymer particles (polysaccharides, proteins and lipids) (Wurl & Holmes 2008); and a range of organic pollutants (Wurl & Obbard 2004). Therefore we expected significant differences between the organic fractions eluted through HPLC-SEC of SML and SSW samples.…”

Section: Discussionmentioning

confidence: 58%

Comparison of sea surface microlayer and subsurface water bacterial communities in the Baltic Sea

Lindroos¹,

Szabo²,

Nikinmaa³

et al. 2011

Aquat. Microb. Ecol.

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Sea surface microlayer (SML) and underlying subsurface water (SSW) bacterial communities from the Baltic Sea were studied using culturing, flow cytometry and terminal restriction fragment length polymorphism (T-RFLP). Dissolved organic matter (DOM) of water samples was determined using high performance liquid size-exclusion chromatography and by measuring dissolved organic carbon. Cadmium, copper, lead and mercury were also measured from the water samples. Two methods were compared for SML sampling: metal screen (MS) and polycarbonate membranes (PCM). All sampling sites were located in the Archipelago Sea off the southwest coast of Finland. The hypothesis was that because of its unique features, such as accumulation of nutrients and pollutants and being unshaded from UV-radiation, the SML would support a different bacterial community to that of SSW. T-RFLP profiles showed differences between the bacterial community compositions of SML and SSW at most sampling sites. In addition, temporal and sampling-site-dependent differences were observed. There were no significant differences in DOM in SML and SSW samples. In most cases, the number of bacteria was slightly higher in the SML than in SSW. No significant cytotoxicity was observed in any of the water samples. Since no temporal trends were obvious, our results suggest that, although bacterial communities in the SML Archipelago Sea differ to some extent from the ones living in SSW, SML is a dynamic environment where bacterial communities possibly develop originally from bacterioplankton and change over time.KEY WORDS: Sea surface microlayer · Bacterial community structure · T-RFLP · Dissolved organic matter Resale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 58%

Comparison of sea surface microlayer and subsurface water bacterial communities in the Baltic Sea

Lindroos¹,

Szabo²,

Nikinmaa³

et al. 2011

Aquat. Microb. Ecol.

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“…Estuaries are among the coastal environments most affected by human activities, and several examples of alterations to their biological communities and water quality have been documented (Calace et al, 2007). Port activities within estuaries lead to frequent channel dredging, which can affect water transparency and interactions between benthic and pelagic communities (Chen et al, 2005).…”

Section: Introductionmentioning

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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