地理漫步·世界地理英语30篇（4）

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亚马孙河：生机勃勃的河流系统

The Amazon River carries more water than the next seven largest rivers combined.
Its basin spans nine countries and covers nearly 40% of South America’s land area.
Rainforest trees release moisture that helps form clouds and feed regional rainfall.
Indigenous communities have lived along its tributaries for over 11,000 years.
Seasonal flooding deposits nutrient-rich silt, enabling diverse aquatic life to thrive.
Deforestation upstream reduces evapotranspiration, weakening the ‘flying river’ effect.
River dolphins, pink and gray, navigate flooded forests using echolocation.
Hydroelectric dams on tributaries disrupt fish migration and sediment flow.
Scientists monitor dissolved organic carbon levels to assess ecosystem health.
Conservation efforts now link protected areas across national borders by design.