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Amazon basin: a system in equilibrium.

E Salati, P B Vose

    Science (New York, N.Y.)
    |July 13, 1984
    PubMed
    Summary
    This summary is machine-generated.

    The Amazon Basin maintains equilibrium through unique water recycling, but deforestation threatens this balance. Continued deforestation will cause erosion, flooding, and reduced rainfall, impacting Brazil

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    Area of Science:

    • Ecology
    • Hydrology
    • Climatology

    Background:

    • The Amazon Basin, despite recent deforestation, remains a largely intact ecosystem in equilibrium.
    • Its unique precipitation and water-recycling regime are influenced by the Andes and easterly winds.
    • Nutrient cycling in the Amazon is characterized by poor soils, with most nutrients in biomass and minimal losses in intact ecosystems.

    Purpose of the Study:

    • To analyze the Amazon Basin's ecological equilibrium.
    • To investigate the impact of deforestation on the region's hydrological and climatic processes.
    • To assess the consequences of reduced precipitation on Brazil's climate and agriculture.

    Main Methods:

    • Analysis of existing data on deforestation rates.
    • Modeling of precipitation and water-recycling regimes.

    Related Experiment Videos

  • Assessment of nutrient cycling in the Amazonian ecosystem.
  • Evaluation of the effects of reduced evapotranspiration and precipitation.

    • Main Results:

    • The Amazon Basin exhibits a significant water-recycling rate, with up to 50% of precipitation being recycled.
    • Deforestation leads to increased erosion, water runoff, and flooding.
    • Reduced evapotranspiration due to deforestation results in decreased precipitation.
    • The nutrient balance is maintained by precipitation inputs and internal recycling in intact forests.

    Conclusions:

    • Continued large-scale deforestation in the Amazon will disrupt the ecosystem's equilibrium.
    • Consequences include increased erosion, flooding, and reduced precipitation, potentially leading to continentality.
    • Adverse impacts on the climate and agriculture of south-central Brazil are anticipated.