scholarly journals Trends in climate extreme indices assessed in the Xingu river basin - Brazilian Amazon

2021 ◽  
Vol 31 ◽  
pp. 100306
Author(s):  
Edmundo Wallace Monteiro Lucas ◽  
Francisco de Assis Salviano de Sousa ◽  
Fabrício Daniel dos Santos Silva ◽  
Rodrigo Lins da Rocha Júnior ◽  
David Duarte Cavalcante Pinto ◽  
...  
Keyword(s):  
River Basin ◽  
Brazilian Amazon ◽  
Climate Extreme ◽  
Xingu River ◽  
Extreme Indices

A new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from Xingu Ria, Amazon River basin, Brazil

Phytotaxa ◽  
2020 ◽  
Vol 477 (2) ◽  
pp. 194-204
Author(s):  
KRYSNA S. MORAIS ◽  
LÍVIA F. COSTA ◽  
CARLOS E. DE M. BICUDO ◽  
LUC ECTOR ◽  
CARLOS E. WETZEL
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
River Basin ◽  
Brazilian Amazon ◽  
Diatom Species ◽  
Amazon River Basin ◽  
Sediment Samples ◽  
Xingu River ◽  
Scanning Electron

A new Planothidium species was found in sediment samples (~4,000 yr BP) from the Xingu Ria (Xingu River), Brazilian Amazon. The new species morphology was analyzed using light and scanning electron microscopy. Planothidium xinguense sp. nov., is mainly characterized by its elliptical, slightly asymmetrical valves, with strongly marked short rostrate ends in the small specimens, while long and strongly rostrate apices are observable in the larger valves. The taxon belongs to the group of species bearing a cavum on the rapheless valves around the name “Planothidium rostratum sensu lato”. Morphology and ecology of the new species is compared with that of morphologically related taxa. Information of core chronology and the co-occurrence of other diatom species in the sample is also provided.

scholarly journals Projected Changes in Extreme Temperature and Precipitation Indices Over CORDEX-MENA Domain

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 622
Author(s):  
Tugba Ozturk ◽  
F. Sibel Saygili-Araci ◽  
M. Levent Kurnaz
Keyword(s):  
Regional Climate Model ◽  
Radiative Forcing ◽  
Climate Model ◽  
Global Climate Model ◽  
Regional Climate ◽  
Climate Extreme ◽  
Pronounced Increase ◽  
Temperature And Precipitation ◽  
Projected Changes ◽  
Extreme Indices

In this study, projected changes in climate extreme indices defined by the Expert Team on Climate Change Detection and Indices were investigated over Middle East and North Africa. Changes in the daily maximum and minimum temperature- and precipitation- based extreme indices were analyzed for the end of the 21st century compared to the reference period 1971–2000 using regional climate model simulations. Regional climate model, RegCM4.4 was used to downscale two different global climate model outputs to 50 km resolution under RCP4.5 and RCP8.5 scenarios. Results generally indicate an intensification of temperature- and precipitation- based extreme indices with increasing radiative forcing. In particular, an increase in annual minimum of daily minimum temperatures is more pronounced over the northern part of Mediterranean Basin and tropics. High increase in warm nights and warm spell duration all over the region with a pronounced increase in tropics are projected for the period of 2071–2100 together with decrease or no change in cold extremes. According to the results, a decrease in total wet-day precipitation and increase in dry spells are expected for the end of the century.

scholarly journals New records of fishes (Actinopterygii: Ostariophysi) from the Upper Tapajós River Basin

Check List ◽  
2012 ◽  
Vol 8 (3) ◽  
pp. 592 ◽  
Author(s):  
Fernando C. P. Dagosta ◽  
Murilo N. L. Pastana ◽  
André L. H. Esguícero
Keyword(s):  
River Basin ◽  
New Records ◽  
River Basins ◽  
Amazon River ◽  
First Report ◽  
Xingu River ◽  
Coastal Rivers

The first report of Sartor (Anostomidae) and Tatia intermedia (Auchenipteridae) for the Upper Tapajós River Basin are presented here. Sartor is very rare on collections, and is reported only from the Trombetas, Tocantins and Upper Xingu river basins. Tatia intermedia is registered in the upper reaches of the Araguaia, Tocantins, Xingu, and Capim rivers, tributaries of the lower Amazon River in Brazil, northwards to the Suriname coastal rivers and the Essequibo River in Guyana.

Length-weight relationships in seven ornamental freshwater species of Characiformes from the Unini River basin (Brazilian Amazon)

2018 ◽  
Vol 34 (5) ◽  
pp. 1188-1191 ◽  
Author(s):  
Thiago Fonseca de Barros ◽  
Bruno Barros Althoff ◽  
Douglas Costa Pereira ◽  
Henrique Lazzarotto ◽  
Érica Pellegrini Caramaschi
Keyword(s):  
River Basin ◽  
Brazilian Amazon ◽  
Freshwater Species

scholarly journals Assessment of Mercury Concentration in Turtles (Podocnemis unifilis) in the Xingu River Basin, Brazil

2018 ◽  
Vol 15 (6) ◽  
pp. 1185
Author(s):  
Marina Pignati ◽  
Juarez Pezzuti ◽  
Larissa Souza ◽  
Marcelo Lima ◽  
Wanderlei Pignati ◽  
...  
Keyword(s):  
River Basin ◽  
Mercury Concentration ◽  
Xingu River ◽  
Podocnemis Unifilis
Sign in / Sign up

Export Citation Format

Share Document