Works in South America
Published research works with metadata for South America (Continent).
1618 works
Showing 51 to 100 of 1618 works
Chromohalobacter sarecensis sp. nov., a psychrotolerant moderate halophile isolated from the saline Andean region of Bo…
A moderately halophilic, aerobic, motile, Gram-negative, rod-shaped bacterium (strain LV4T) was isolated from saline soil around the lake Laguna Verde in the Bolivian Andes. The o…
Carbon dioxide and methane fluxes in grazed and undisturbed mountain peatlands in the Ecuadorian Andes
Peatlands are widespread throughout the tropical Andean páramo. Despite the large carbon stocks in these ecosystems, carbon dioxide (CO2) and methane (CH4) flux data are lacking. …
A documentation of glacier tongue variations and lake development in the Cordillera Blanca, Peru
Abstract At Hualcán in the Cordillera Blanca is a high-altitude glacier lake dammed by a moraine. Local glaciers regularly produce ice avalanches. In 1988 it was confirm…
Structure and diversity of stream invertebrate assemblages: the influence of temperature with altitude and latitude
1. Structure and diversity of the macroinvertebrate fauna were studied in relation to altitude and latitude among three groups of streams from Ecuador (lowland: 100–600 m, Central…
Are macroinvertebrates in high altitude streams affected by oxygen deficiency?
Summary1. The solubility of oxygen in water increases with decreasing temperature. This has led to a general perception of cold, high mountain streams as more oxygen rich than war…
Low oxygen pressure as a driving factor for the altitudinal decline in taxon richness of stream macroinvertebrates
Abstract. Spatial variation in hydraulic conditions in streams often results in distinct water surface patterns, or surface flow types. Visual assessments of the distribution of s…
Lacustrine sedimentation in active volcanic settings: the Late Quaternary depositional evolution of Lake Chungará (nort…
AbstractLake Chungará (18°15′S, 69°09′W, 4520 m above sea‐level) is the largest (22·5 km2) and deepest (40 m) lacustrine ecosystem in the Chilean Altiplano and its location in an …
A 22,000-Year Record of Monsoonal Precipitation from Northern Chile's Atacama Desert
Fossil rodent middens and wetland deposits from the central Atacama Desert (22° to 24°S) indicate increasing summer precipitation, grass cover, and groundwater levels from 16.2 to…
A 2,300-year-long annually resolved record of the South American summer monsoon from the Peruvian Andes
Decadal and centennial mean state changes in South American summer monsoon (SASM) precipitation during the last 2,300 years are detailed using an annually resolved au…
Synchronous interhemispheric Holocene climate trends in the tropical Andes
Holocene variations of tropical moisture balance have been ascribed to orbitally forced changes in solar insolation. If this model is correct, millennial-scale climate evolution s…
Salicola marasensis gen. nov., sp. nov., an extremely halophilic bacterium isolated from the Maras solar salterns in Pe…
Six strains of extremely halophilic bacteria were isolated from several crystallizer ponds of the Maras solar salterns in the Peruvian Andes. On the basis of 16S rRNA gene sequenc…
Late Holocene summer temperatures in the central Andes reconstructed from the sediments of high-elevation Laguna Chepic…
Abstract. High-resolution reconstructions of climate variability that cover the past millennia are necessary to improve the understanding of natural and anthropogenic climate chan…
Delta progradation and Neoglaciation, Laguna Paron, Cordillera Blanca, Peru
AbstractThe history of Holocene glaciation serves as an important record of glacier mass balance and, therefore, of climatic change. The moraine record of Holocene glaciation in t…
The rainbow trout Salmo gairdneri (Rich.) fishery of Lake Titicaca
Rainbow trout were introduced to Lake Titicaca in 1942. A commercial trout canning operation started in 1961 but terminated in 1970. Data for this study were collected in 1966 and…
Notes on the Birds of Lake Junin, Central Peru
After I had finished my work in the Department of Huancavelica, in January 1938, I made a lengthy stay on Lake Junin. This lake is the source of the Mantaro River, and lies about …
Lago Verde and Lago Flaco: Gypsum-bound lakes of the Chilean altiplano
Two small perennial salt lakes in a salar of the Chilean altiplano have indurated bottom sediments and are bordered by damlike ramparts composed of almost pure gypsum. The bottom …
Glaciological Problems Set by the Control of Dangerous Lakes in Cordillera Blanca, Peru. III. Study of Moraines and Mas…
Abstract We explain how preliminary results concerning the internal constitution of the big push moraine at Safuna were obtained in 1967. Cross-sections which we…
Formation of silica oncoids around geysers and hot springs at El Tatio, northern Chile
ABSTRACTSiliceous oncoids, up to 4 cm in diameter, are common on the laterally extensive sinter aprons that surround the spectacular geysers and hot springs at El Tatio in norther…
Crystal fabrics and microbiota in large pisoliths from Laguna Pastos Grandes, Bolivia
ABSTRACTLarge pisoliths from the Laguna Pastos Grandes playa in the Bolivian Altiplano have a wide diversity of cortical fabrics and variable mineralogical composition. The cortic…