地理漫步·世界地理英语30篇（4）
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The Amazon: A Living River System
亚马孙河：生机勃勃的河流系统
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The Amazon River carries more water than the next seven largest rivers combined.
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Its basin spans nine countries and covers nearly 40% of South America’s land area.
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Rainforest trees release moisture that helps form clouds and feed regional rainfall.
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Indigenous communities have lived along its tributaries for over 11,000 years.
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Seasonal flooding deposits nutrient-rich silt, enabling diverse aquatic life to thrive.
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Deforestation upstream reduces evapotranspiration, weakening the ‘flying river’ effect.
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River dolphins, pink and gray, navigate flooded forests using echolocation.
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Hydroelectric dams on tributaries disrupt fish migration and sediment flow.
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Scientists monitor dissolved organic carbon levels to assess ecosystem health.
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Conservation efforts now link protected areas across national borders by design.