地理漫步·世界地理英语30篇（1）

1 / 30

横断山区垂直带谱

The Hengduan Mountains stretch across southwest China, where elevation changes exceed 6,000 meters within short horizontal distances.
Because of this steep rise, temperature and moisture shift rapidly, creating distinct vegetation belts stacked like layers on a cake.
At the base lie subtropical evergreen forests, while alpine meadows appear above 4,000 meters where cold winds limit tree growth.
Glaciers cap the highest peaks, and snowmelt feeds rivers that flow south into Southeast Asia.
Local ethnic communities have adapted farming practices to each zone, growing rice in valleys and barley on high slopes.
Scientists monitor these bands closely, as climate warming pushes treelines upward and shrinks alpine habitats.
Soil types also vary sharply—deep red earths dominate lowlands, whereas thin, rocky soils cover upper slopes.
This vertical diversity supports over 6,000 plant species, more than all of Europe combined.
Unlike gradual transitions elsewhere, here one can hike through five climate zones in under 20 kilometers.
Such dramatic layering makes the Hengduan region a global natural laboratory for studying altitude-driven ecology.