The influence of the Amazonian floodplain ecosystems on the trace element dynamics of the Amazon River mainstem (Brazil)

Viers, Jérôme; Barroux, G.; Pinelli, M.; Seyler, Patrick; Oliva, Priscia; Dupré, Bernard; Boaventura, Géraldo Resende

doi:10.1016/j.scitotenv.2004.07.034

Cited by 45 publications

(26 citation statements)

References 22 publications

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“…Analyses of porewaters from deep and surface soil horizons (i.e., 17a and 17b; 85a, 85b and 89) demonstrates only slight enrichments in the deep horizon and the absence of chemical transformation during lateral migration of soil porewaters (suprapermafrost flow) along the permafrost table to the river. Indeed, although the sample of surface soil solution (17b, 0-10 cm) exhibits concentrations that are a factor of 2 lower for most dissolved elements compared to the sample from the deep soil Vegetation is known to be an important factor controlling the geochemistry of trace elements in continental environments representing a large pool of TE storage (Viers et al, 2005) and strongly contributing to TE cycling in cold, boreal climates (Dobrovolsky, 1988). We compared Al-normalized TE accumulation in litter to their concentrations in soil horizons and parent rocks (Fig.…”

Section: Sources Of Te and Mechanisms Of Their Migrationmentioning

confidence: 99%

Trace element fractionation and transport in boreal rivers and soil porewaters of permafrost-dominated basaltic terrain in Central Siberia

Pokrovsky¹,

Schott²,

Dupré³

2006

Geochimica et Cosmochimica Acta

224

131

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Section: Sources Of Te and Mechanisms Of Their Migrationmentioning

confidence: 99%

Trace element fractionation and transport in boreal rivers and soil porewaters of permafrost-dominated basaltic terrain in Central Siberia

Pokrovsky¹,

Schott²,

Dupré³

2006

Geochimica et Cosmochimica Acta

224

131

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“…The Amazon delta ( Figure 1a) is one of the last frontiers for land development and agricultural production in Brazil (UNEP 2004;Viers et al 2005;Lorena and Lambin 2009;Garrett et al 2013). The human populations living in the Amazon delta are highly dependent on local extraction of natural resources (Ludewigs et al 2009;Guedes et al 2012), and the densely inhabited areas now show declines in the abundance of fish and game, water quality and in the quality of soils for smallholding agricultural production (Almeida et al 2003;Brabo et al 2003).…”

Section: Amazonmentioning

confidence: 99%

Evolutionary social and biogeophysical changes in the Amazon, Ganges–Brahmaputra–Meghna and Mekong deltas

et al. 2016

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Policy-making in social-ecological systems increasingly looks to iterative, evolutionary approaches that can address the inherent complexity of interactions between human wellbeing, provision of goods and the maintenance of ecosystem services. Here, we show how the analysis of available time-series in tropical delta regions over past decades can provide important insight into the social-ecological system dynamics in deltaic regions. The paper provides exploratory analysis of the recent changes that have occurred in the major elements of three tropical deltaic social-ecological systems, such as demography, economy, health, climate, food, and water. Timeseries data from official statistics, monitoring programmes and Earth observation data are analysed to explore possible trends, slow and fast variables, and observed drivers of change in the Amazon, Ganges-Brahmaputra-Meghna and Mekong deltas. In the Ganges-BrahmaputraMeghna delta zone, increasing gross domestic product and per capita income levels since the 1980s mirror rising levels of food and inland fish production. In contrast, non-food ecosystem services, such as water availability, water quality and land stability appear to be deteriorating. In the Amazon delta, natural and anthropogenic perturbations are continuously degrading key ecosystem services, such as carbon storage in biomass and soils, the regulation of water balance, and the modulation of regional climate patterns. In the Mekong delta, rapid economic development, changing land use practices and salinity intrusion, are progressively putting more pressure on the delivery of important provisioning services, such as rice and inland aquaculture production, which are key sources of staple food, farm incomes and export revenue. Observed changes in many key indicators of ecosystem services point to a changing dynamic state and increased probability of systemic threshold transformations in the near future.

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“…Vários autores têm avaliado a presença dos elementos químicos na bacia do rio Amazonas [5], [6]. Seyler & Boaventura [7] avaliaram a concentração e a variabilidade temporal de V, Cr, Mn, Co, Cu, Zn, As, Rb, Sr, Mo, Cd, Sb, Cs, Ba, U no rio Amazonas e seus afluentes principais (Negro, Madeira e Solimões) até a estação de Óbidos.…”

Section: Distribuição De Elementos Tóxicos No Estuário Do Rio Amazonasunclassified

Distribuição de elementos tóxicos no estuário do rio Amazonas

Pereira

Pires

Saraiva³

et al. 2011

Eclet. Quim.

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A presença de elementos não essenciais nas águas superficiais do rio Amazonas é uma preocupação global, o objetivo da pesquisa foi estudar a distribuição dos elementos As, Al, Mn, e Pb na água do estuário do rio Amazonas. As amostras foram coletadas em três regiões distintas: Canal Norte (AP), Canal Sul (PA) e rio Pará (PA) em três profundidades, com um total de 84 amostras. A espectrometria de emissão atômica com plasma indutivamente acoplado (ICPAES) foi utilizada para avaliar os teores de Al, Mn e Pb e a espectrofotometria de absorção atômica com geração de hidretos (HGAAS) foi usada para a análise do As. O As variou de <0,35 a 50,60 μg/L, o Al de <1,88 a 3347,70 μg/L, o Mn de 0,13 a 403,39 μg/L e Pb de <0,18 a 57,78 μg/L. Em média As (canal Sul), Al (todas as regiões), Mn (canal Norte e Sul) e Pb (canal Norte e Sul) se encontraram em valores acima do permitido pela legislação brasileira. Os elementos podem ter origem antrópica originária de atividade de mineração e industrial e origem natural proveniente de decomposição de rochas ígneas da bacia de drenagem do rio Amazonas que disponibilizam o elemento na forma ligada ao material particulado em suspensão.

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The influence of the Amazonian floodplain ecosystems on the trace element dynamics of the Amazon River mainstem (Brazil)

Cited by 45 publications

References 22 publications

Trace element fractionation and transport in boreal rivers and soil porewaters of permafrost-dominated basaltic terrain in Central Siberia

Trace element fractionation and transport in boreal rivers and soil porewaters of permafrost-dominated basaltic terrain in Central Siberia

Evolutionary social and biogeophysical changes in the Amazon, Ganges–Brahmaputra–Meghna and Mekong deltas

Distribuição de elementos tóxicos no estuário do rio Amazonas

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