Browsing by Author "d1704d50-7d64-4adb-aca0-ddf13344621f"
Now showing items 1-20 of 39
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Artificial neural networks applied to quantitative elemental analysis of organic material using PIXE (ELSEVIER, 2006-08)An artificial neural network (ANN) has been trained with real-sample PIXE (particle X-ray induced emission) spectra of organic substances. Following the training stage ANN was applied to a subset of similar samples thus ...
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(Frontiers Media S.A., 2019)Copyright © 2019 Aguilar, Dorador, Vila and Sommaruga.Species of the genus Nostoc (Cyanobacteria) can form large colonies of up to several centimeters in diameter that may represent a unique habitat for bacteria in ...
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(Oxford University Press, 2018)High-elevation lakes in the tropics are subject to extreme environmental fluctuations and microbes may harbor a unique genomic repertoire, but their composition and diversity are largely unknown. Here, we compared the ...
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(Pensoft Publishers, 2017)Orestias Valenciennes, 1839 is a genus of freshwater fish endemic to the South American Altiplano. Cytogenetic studies of these species have focused on conventional karyotyping. The aim of this study was to use classical ...
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(Universidad de Concepcion, 2014)© 2014, Universidad de Concepcion. All rights reserved. Within the Annelida phylum, the Histriobdellidae Family groups freshwater polychaetes sharing an ancient Gondwanic relationship; very little is known about their life ...
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Competitive interaction between introduced rainbow trout and native silverside in a Chilean stream (Springer Netherlands, 2009)The field experiment presented here elucidates the competitive effect of exotic trout on Chilean silverside. This is the first local experimental work that demonstrates the negative effect of trout on native fish from ...
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(Nature Publishing Group, 2018)How organisms adapt to unfavorable environmental conditions by means of plasticity or selection of favorable genetic variants is a central issue in evolutionary biology. In the Maipo River basin, the fish Basilichthys ...
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(2001)A bacterial contact assay is described which uses a chemoautotrophic microorganism, Nitrosomonas communis (strain Nm2) to evaluate the biological effect of contaminated soils. The effects of two toxicants on the ammonium ...
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(Springer, 2016)In order to determine the effect of a dam on metal concentrations in riverine fish species, we studied fish inhabiting the influent (Cachapoal River) and effluent (Rapel River) of the Rapel Reservoir in central Chile. Heavy ...
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(2001)An important disturbance of anthropogenic origin frequently occurring in freshwater ecosystems is a rise in the concentration of heavy metals in solution, among which copper stands out due to its known toxicity. However, ...
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(Elsevier, 2020)The Neotropical region is an important reservoir of functional diversity of freshwater fish in the world. Recent studies have shown that functional and taxonomic diversity in this region has increased as a consequence of ...
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(Springer Verlag, 2016)© 2016, The Author(s). Studies of different hypersaline systems have revealed various types of limitation. We evaluated the phototrophic microbial assemblages over a whole seasonal cycle (wet vs dry) in the Salar de Alconcha, ...
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(2011)The impact of recent habitat fragmentation on population genetic diversity and structure has often been studied, mainly related to anthropogenic causes; however its long-term effect has been much less evaluated. In this ...
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(Scientific Research Publishing, 2018)Diatom floras were examined in a high-altitude geothermal field, 4200 - 4500 m (29 degrees 19'S 68 degrees W'), located in the Central Andean dry Puna ecoregion or southern Altiplano. These locations include hostile ...
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Head morphometry of Orestias (Cyprinodontiformes). Response to extreme Southern Altiplano systems? (Springer, 2020)The distribution ofOrestias(Cypriniforms) species in the southern western Altiplano (17oS-22oS) is allopatric; the seven species described inhabit different freshwater systems with extreme climatic characteristics and ...
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(Sociedad Chilena Química, 2016)RIVER flows have constant interaction between water and bed sediments; for this reason knowledge of the characteristics of the sediments is fundamental to understand water chemistry. This study determined the concentrations ...
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(Soc Int Odonatologica, 2017-06)Pantala flavescens is the most widespread odonate on Earth, absent only in Antarctica and parts of Europe. A recent study performed with sequences of mtDNA suggested the presence of one panmictic population of the species ...
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(Elsevier, 2020)The Ascot an salt pan is an extreme freshwater system in the Southern Altiplano of Chile (17 -22 S). Its origin has been traced to the presence of the paleolake Minchin approximately 0.0117 Ma. Currently, this system has ...
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(Springer, 2020)Orestias is an endemic fish genus of lacustrine and lotic systems distributed on theAndes highland region (Altiplano) of Peru, Bolivia and Chile (9°S to 22°S). Based on morphological characters, taxonomic studies have ...
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(Universidad de Concepcion, 2015)© 2015, Universidad de Concepcion. All rights reserved. This study examines the limnology and ecology of two high altitude wetlands, Lirima (19°51’24 S; 68°55’02 W; 4000 m asl) and Caya (20°37’21 S; 68°58’28 W; 3700 m asl), ...
