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Dust inputs and bacteria influence dissolved organic matter in clear alpine lakes
Remote lakes are usually unaffected by direct human influence, yet they receive inputs of atmospheric pollutants, dust, and other aerosols, both inorganic and organic. In remote, alpine lakes, theseExpand
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Structure and dynamics of food webs in Andean lakes
Food webs from oligotrophic Andean lakes of Bariloche region (41°S) are described. Their peculiarities in comparison with Northern Hemisphere studies are noted. The endemic species composition, theExpand
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Photoprotection by carotenoid pigments in the yeast Rhodotorula mucilaginosa: the role of torularhodin.
In this paper we report the relationship between carotenoids and ergosterol and cell UV-B resistance in different strains of the yeast Rhodotorula mucilaginosa. Cell survival was studied using a setExpand
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Constitutive and UV-inducible synthesis of photoprotective compounds (carotenoids and mycosporines) by freshwater yeasts.
Twelve yeasts isolated from lakes of Northwestern Patagonia, Argentina, belonging to eight genera (Sporobolomyces, Sporidiobolus, Rhodotorula, Rhodosporidium, Cystofilobasidium, Cryptococcus,Expand
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Methylmercury production in the water column of an ultraoligotrophic lake of Northern Patagonia, Argentina.
Methyl-mercury (CH3Hg+) production was studied in freshwaters from lake Moreno, an ultraoligotrophic system belonging to Northern Patagonia. Hg2+ labelled with high specific activity 197Hg was spikedExpand
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Multi-model study of mercury dispersion in the atmosphere: atmospheric processes and model evaluation
Abstract. Current understanding of mercury (Hg) behavior in the atmosphere contains significant gaps. Some key characteristics of Hg processes, including anthropogenic and geogenic emissions,Expand
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Low crowding threshold for induction of sexual reproduction and diapause in a Patagonian rotifer
Summary 1. This study investigates the basis and ecological significance of the extremely high propensity for mixis (sexual reproduction) observed in laboratory populations of BrachionusExpand
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Suppression of the rotifer Polyarthra remata by the omnivorous copepod Tropocyclops extensus: predation or competition
Indirect evidence from observations in the field suggested that a common and often abundant cyclopoid copepod, Tropocyclops extensus, despite its small size (0.5 mm) and largely algal diet, is anExpand
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Photoprotective role of carotenoids in yeasts: Response to UV-B of pigmented and naturally-occurring albino strains.
In this work, the photoprotective role of carotenoids in yeasts was analysed by contrasting the responses to UV-B of pigmented and naturally occurring albino strains of Sporobolomyces ruberrimus andExpand
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Occurrence of Photoprotective Compounds in Yeasts from Freshwater Ecosystems of Northwestern Patagonia (Argentina)
Abstract In this paper we present the results of research on the occurrence, induction and role of photoprotective compounds (PPCs) present in native aquatic yeasts from freshwater PatagonianExpand
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