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The attenuation of solar UV radiation in lakes and the role of dissolved organic carbon
Diffuse attenuation coefficients (&) for solar UV radiation (UVR) (305, 320, 340, 380 nm, and PAR) were measured in the mixed layer of 65 lake sites in Alaska, Colorado, and Pennsylvania and theExpand
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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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Impact of fish introduction on planktonic food webs in lakes of the Patagonian Plateau
Patagonia fishless ponds have been stocked with fishes for recreational purposes since early in the 20th century. We carried out a summer plankton sampling in 18 Patagonian lakes; 12 fishless, 5 withExpand
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Phylogenetic diversity of nonmarine picocyanobacteria.
We studied the phylogenetic diversity of nonmarine picocyanobacteria broadening the sequence data set with 43 new sequences of the 16S rRNA gene. The sequences were derived from monoclonal strainsExpand
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Balance between primary and bacterial production in North Patagonian shallow lakes
The shallow Andean North Patagonian lakes are suitable environments for the evaluation of autotrophic and heterotrophic production under a scenario of high radiation in high dissolved organic matterExpand
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Production and biomass of picophytoplankton and larger autotrophs in Andean ultraoligotrophic lakes: differences in light harvesting efficiency in deep layers
We measured biomass and primary production of picophytoplankton (PicoPhy: 0.2–2 μm) and of autotrophic size fraction >2 μm in six deep ultraoligotrophic lakes in the Andean-Patagonian region (aroundExpand
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Effect of volcanic eruption on nutrients, light, and phytoplankton in oligotrophic lakes
Volcanic eruptions that shape the earth's surface can have major effect on ecosystems and, as natural experiments, can yield insights into ecological dynamics. On 04 June 2011, a mega-eruption in theExpand
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Responses of plankton and fish from temperate zones to UVR and temperature in a context of global change
In the last decades, both temperature and UVB (280-315 nm) radiation on the surface of the Earth increased at growing rates as a result of human activities. Many studies had evaluated the effects ofExpand
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Phytoplankton responses to experimental enhancement of grazing pressure and nutrient recycling in a small Andean lake
abundance of the diatom Aulacoseira granulata and P concentration was observed. These results indicate that the ungrazed diatom was able to capitalise on the increase in nutrient availability. 4. AsExpand
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Community Structure and Biogeochemical Impacts of Microbial Life on Floating Pumice
ABSTRACT Volcanic eruptions are a widespread force of geological and ecological disturbance and present recurrent opportunities for the study of biological responses to novel habitat formation.Expand
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