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This indicates low risk for human consumption. However, the fish analyzed did not exhibit relevant levels of contamination.
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This was the first study about trace elements in the Middle Xingu River, which leads us to conclude that rainfall and cassiterite mining activities strongly influence the mobilization of metals, especially in abiotic compartments. Concentrations in water, sediment, and soil showed that some points of the Xingu River, Fresco River and mining pits are contaminated by trace elements, mainly As, Hg, Cr, Pb, and Ni. Metal values in the muscle of both fish species were relatively low at all sampling points and in both monitored seasons. Samples of sediment (Ni>18mg/kg and Cr>37.30mg/kg) and soil (Pb>72mg/kg, Cr>75mg/kg and Ni>30mg/Kg) showed concentrations above the recommended by local legislation. The sites with mining activity were the regions that were the most contaminated by metals. PERMANOVA showed that the metals behaved differently in the water throughout the monitored season and between sampling points. Ordination analysis (PCA) highlighted As and Cu elements in the water. 368 indigenous people were examined in 2007 and 423 in 2013 there was no significant difference between the means of the number of decayed, missing and filled teeth at 5 years (6.43, 5.85 p=0.29), and at 12 years (2.54, 2.78 p=0.81) this difference was significant at 15-19 years (6.89, 4.65 p0.14μg/L) was higher than the local reference values at all sampling points and in both seasons. cross-sectional study panel, with secondary data provided by the Indigenous Special Sanitary District of Xingu and Project Xingu. To describe the prevalence of dental caries and the supply of dental care in the population of Xingu Indigenous Park, Brazil, at 5, 12 and 15-19 years old, in 20. Lemos, Pablo Natanael Rodrigues, Douglas Antonio Frazão, Paulo Coelho, Clayton Carvalho Campos, Juliana Nogueira de Souza Narvai, Paulo Capel Numerous fires occurred near the headwaters of the Xingu River and the Xingu Indigenous Peoples Reserve in Mato Grosso, Brazil, during late June and early July, 2004, as seen by NASA Terra spacecraft.ĭental caries in peoples of Xingu Indigenous Park, Brazil, 20. The limited sensitivity of the vital rates to environmental gradients in the area suggests that ecological generalism contributes to the success of this dominant Amazonian liana.Fire and Deforestation near the Xingu River The mortality of seedling-sized plants was higher in areas with intermediate slope, but for larger plants mortality was not related to environmental variation. There was weak positive effect of dense understorey on the relative growth rate of climbers.
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Out of 448 seedling-sized plants 421 died, 539 of 732 non-climbers died, and 107 of 198 climbers died. Plants were divided into seedling-sized individuals, non-climbers and climbers. The population was inventoried in 1998 and in 2009. To test how environmental variation may contribute to the success of dominant species we investigated whether the vital rates of the abundant liana Machaerium cuspidatum is sensitive to canopy height, topographic steepness, vegetation density, soil components and floristic composition across an Ecuadorian Amazon forest. The high diversity can be related to specific habitat requirements in many of the less common species, but fewer studies have investigated the characteristics of the dominant species. Despite its high plant diversity, the Amazon forest is dominated by a limited number of highly abundant, oligarchic tree and liana species.