Results 51 to 60 of about 4,281 (217)
The viability of hydropower production depends on water and energy distribution, storage capacities, and technical constraints. Understanding the sensitivity of runoff variability to hydroelectricity production is a step to better assess its potential and add value to society.
Thais Fujita +6 more
openaire +1 more source
Phosphorus, nitrogen, and carbon contents of macrophytes in lakes lateral to a tropical river (Paranapanema River, São Paulo, Brazil) [PDF]
AIM: The aim of this paper was to determine the phosphorus, nitrogen, and carbon contents of aquatic macrophyte species during two periods of the year in the land-water transition zone of three lakes lateral to the Paranapanema River (Sao Paulo); METHODS: Plants, water, and sediment were collected during two distinct periods (August 1998 and February ...
Costa, Mara Lucia Rodrigues +1 more
openaire +5 more sources
The pre-colonial riverine occupation of the Middle Paranapanema.
As part of the ongoing research developed by the “Paranapanema Project” extensive surveys were carried out along this river in 1994. The archaeological reconnaissance of this area is particularly interesting since the remainning parts of the middle ...
Erika Marion Robrahn González
doaj +1 more source
Out of Amazonia: late-Holocene climate change and the Tupi–Guarani trans-continental expansion [PDF]
The late Holocene expansion of the Tupi-Guarani languages from southern Amazonia to SE South America constitutes one of the largest expansions of any linguistic family in the world, spanning ~ 4000 km between latitudes 0°S and 35°S at about 2500 yr B.P ...
Absy ML +29 more
core +3 more sources
The Oxygen Deficit in Jurumirim Reservoir(Paranapanema River, Sao Paulo, Brazil).
Oxygen actual and relative deficits in Jurumirim Reservoir were computed from the temperature and dissolved oxygen profiles determined in a study from March 1988 to March 1989. The reservoir presented an isothermy from June to September and a thermal stratification from October to March.
openaire +3 more sources
In this study, the RAPD technique was used to analyze the genetic structure of populations of the fish Astyanax altiparanae (Characidae, Tetragonopterinae) living in the lower, middle and upper Paranapanema River, Brazil.
Maria Sueli Papa Leuzzi +3 more
doaj +1 more source
The Federation of Indian Organizations of the Negro River's journey for traditional land demarcation in Brazil [PDF]
The article aims to present the fight for government recognition of indigenous collective rights to land ownership in the Upper Rio Negro region in Brazil. It contextualizes the historical aspects of the colonization process in the region and the efforts
Brigagão, Jacqueline +2 more
core +4 more sources
Abstract Genomic resources, new microsatellite markers and a novel observation of a fractal pattern in the genetic population structure are presented for curimba, Prochilodus lineatus, a freshwater migratory model species of South America. Our main goals were to investigate the presence of mixed fish stocks and the effects of damming‐induced ...
Gabriel M. Yazbeck +5 more
wiley +1 more source
Zooplankton assemblages (Copepoda and Cladocera) in a cascade of reservoirs of a large tropical river (SE Brazil) [PDF]
The construction of reservoirs for the production of electricity is one of the major human interferences on large tropical rivers. This study analyzes the structure of the microcrustacean assemblages (Copepoda and Cladocera) in a cascade of 8 reservoirs ...
Nogueira, Marcos G. +2 more
core +1 more source
Abstract The tempo and mode of assembly of the world's most diverse, tropical floras remain poorly known. Evolutionary relationships within pantropical plant clades such as Connaraceae (Oxalidales, ca. 220 species) offer an opportunity to address this issue.
Serafin J.R. Streiff, Jurriaan M. de Vos
wiley +1 more source

