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Your search keyword '"G. Koremblit"' showing total 2 results
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2 results on '"G. Koremblit"'

1. A soil nutrient gradient in Magellanic Empetrum heathlands

Author

Juan Anchorena, G. Koremblit, and Marta B. Collantes

Subjects
geography, Empetrum, geography.geographical_feature_category, Ecology, biology, Steppe, Biodiversity, Plant Science, biology.organism_classification, Floristics, Plant ecology, Botany, Environmental science, Empetrum rubrum, Ordination, Trophic level
Abstract

The relationship of environmental and soil-nutrient variables with the floristic composition of Empetrum rubrum heathlands and related communities from northern Tierra del Fuego were studied by means of ordination techniques. A floristic gradient was found which had its axis of major variation closely related to a gradient in soil trophic status. Increases in the densities of Empetrum and other cushion plants (Bolax gummifera, Azorella lycopodioides, Pernettya pumila) along the floristic gradient were: (a) associated with a lower number of species and total cover, and greater soil erosion; (b) positively correlated with the C/N ratio and aluminium content in the soil; and (c) negatively correlated with pH, calcium content and base saturation.

Published
1989
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2. Fate of a broad spectrum of perfluorinated compounds in soils and biota from Tierra del Fuego and Antarctica.

Author

Llorca M, Farré M, Tavano MS, Alonso B, Koremblit G, and Barceló D

Subjects
Animals, Antarctic Regions, Argentina, Biota, Environmental Pollutants analysis, Environmental Pollution statistics & numerical data, Feces chemistry, Fishes metabolism, Fluorocarbons analysis, Microalgae metabolism, Soil chemistry, Spheniscidae metabolism, Environmental Monitoring, Environmental Pollutants metabolism, Fluorocarbons metabolism
Abstract

In this study, the presence of 18 perfluorinated compounds was investigated in biota and environmental samples from the Antarctica and Tierra de Fuego, which were collected during a sampling campaign carried out along February and March 2010. 61 samples were analysed including fish, superficial soils, guano, algae, dung and tissues of Papua penguin by liquid chromatography coupled to tandem mass spectrometry. The concentrations of PFCs were ranging from 0.10 to 240 ng/g for most of the samples except for penguin dung, which presented levels between 95 and 603 ng/g for perfluorooctane sulfonate, and guano samples from Ushuaia, with concentration levels of 1190-2480 ng/g of perfluorohexanoic acid. PFCs acids presented, in general, the highest levels of concentration and perfluorooctanesulfonate was the most frequently found compound. The present study provides a significant amount of results, which globally supports the previous studies, related to the transport, deposition, biodegradation and bioaccumulation patterns of PFCs., (Copyright © 2011 Elsevier Ltd. All rights reserved.)

Published
2012
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