Fatty Acids as Trophic and Chemical Markers in Freshwater Ecosystems

Napolitano, Guillermo E.

doi:10.1007/978-1-4612-0547-0_3

Cited by 219 publications

(284 citation statements)

References 85 publications

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“…Higher proportions of n-C16:1 ω 7 are known from diatoms but can also be enhanced in cyanobacteria (e.g. Volkman et al 1998, Wakeham 1995, Napolitano 1998. Conversely, a low diversity of isoprenoidal and longchain components occurs.…”

Section: Molecular Composition Of Lipids From the Seaward Sitesmentioning

confidence: 99%

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Zink

Furtado

Casper

et al. 2004

An. Acad. Bras. Ciênc.

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Freshwater lagoons comprise important coastal ecosystems and natural buffers between urbanized land areas and open ocean in the Rio de Janeiro State, Brazil. Studies of sediment and water chemistry, zooplankton and bacterial communities to assess the extent of anthropogenic disturbance are available. Here we contribute with an organic-geochemical approach supplemented by some microbiological aspects to complete the characterization of these lagoonal ecosystems. Bulk organic matter and extractable lipids (aliphatic hydrocarbons, alcohols and fatty acids, sterols) were investigated from two locations per lagoon: at the seaward site and landward ends -and at two depth intervals (0-3 and 3-6 cm) per site. Urbanized Imboacica Lagoon received increased anthropogenic input over the most recent years represented by the topmost 3 cm of sediment, whereas deeper sediment layers are less affected by human influence. Eutrophication or nutrient availability favored enhanced algal/cyanobacterial growth. In remote Cabiúnas and Comprida Lagoons pristine conditions are preserved. Organic matter from vascular plants dominates (chain length of free lipids up to C36), which is exceptionally well preserved by acidic lagoonal waters. Differentiation between landward and seaward sites in these two lagoons is less well established due to much smaller surface/volume to catchment ratios. No anthropogenic influences are yet detectable in sediments of Cabiúnas and Comprida Lagoons.

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Section: Molecular Composition Of Lipids From the Seaward Sitesmentioning

confidence: 99%

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Zink

Furtado

Casper

et al. 2004

An. Acad. Bras. Ciênc.

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“…Among them, polyunsaturated fatty acids (PUFAs) especially eicosapentaenoic (EPA), docosahexaenoic (DHA), and arachidonic acids (AA) are the most valuable to create significant physiological and biochemical changes in a body, including reducing risk of cardiovascular diseases [5][6][7][8][9] . Definitely, the total lipid content may vary noticeably among individual species or strains within and between taxonomic groups 7 .…”

Section: Introductionmentioning

confidence: 99%

Effect of nutrients on total lipid content and fatty acids profile of Scenedesmus obliquus

Darki

Seyfabadi

Fayazi

2017

Braz. arch. biol. technol.

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“…The predominance of fatty acids with chain length of 16-18 carbon atoms in the tissues of the studied macrophytes is explained by the fact that they make up a large part of the acids in the membrane lipids of many taxonomic groups of living organisms, including those for higher plants as mostly 16-and 18-carbon fatty acids are part of the cell membrane lipids (Gunstone, 1996;Napolitano, 1998;Heldt, 2005). A large proportion of total fatty acids accounted for C18 unsaturated acids.…”

Section: Discussionmentioning

confidence: 99%

“…It is believed that the acid does not play only a structural role in membrane lipids, but also participates in the process of photosynthesis. Therefore, in the tissues of photosynthetic plants this acid is present in significant amounts (Napolitano, 1998;Novitskaya et al, 2000;Vance, Vance, 2002;Heldt, 2005;Vereshchagin, 2007).…”

Section: Discussionmentioning

confidence: 99%

The influence of cadmium chloride and hyperthermia on the fatty acid composition of high aquatic plants from Angara River

Кириченко¹,

Побежимова²

2014

Biologija

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Water is the basic component of all living organisms and the biosphere. The intensification of using water in the industrial, agricultural and domestic consumption leads to an increased anthropogenic impact on water ecosystems. High aquatic plants are the most important component of aquatic ecosystems. They take part in the process of exchange of nutrients in self-purification of water, can accumulate and transform organic and inorganic pollutants. Aquatic plants are considered and used as sites for monitoring ecological status of water bodies. In this study we investigated the fatty acid composition of higher aquatic plants from Angara River under the influence of hyperthermia 30 °C, and cadmium chlo ride 100 mg/l. Macrophytes Elodea canadensis Michx. and Myrio phyllum spicatum L. were gathered at a high flow of Angara River. After cultivation in the laboratory conditions the plants from experimental group were replaced in a solution of cadmium chloride (100 mg/l) during 24 and 48 h. In another experiment the plants were replaced in distilled water, 30 °C heated, and incubated during 24 or 48 h. Lipids were extracted with mixture of chloroform: methanol (2:1). Analysis of fatty acids composition was carried out in form of methyl ethers by the method of chromato-mass-spectrometry. The changes of the fatty acid composition in response to hyperthermia and cadmium chloride were found. The differences in the fatty acid composition changes of the studied species were shown after 24 and 48 h of exposure. Differences in the metabolism of fatty acids should be considered for the development of methods of biomonitoring and bioassay.

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Fatty Acids as Trophic and Chemical Markers in Freshwater Ecosystems

Cited by 219 publications

References 85 publications

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Organic matter composition in the sediment of three Brazilian coastal lagoons: district of Macaé, Rio de Janeiro (Brazil)

Effect of nutrients on total lipid content and fatty acids profile of Scenedesmus obliquus

The influence of cadmium chloride and hyperthermia on the fatty acid composition of high aquatic plants from Angara River

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