Vertical Zones on the Hengduan Mountains

横断山区垂直带谱

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The Hengduan Mountains stretch across southwest China, where elevation changes exceed 6,000 meters within short horizontal distances.

横断山脉纵贯中国西南，短距离内海拔落差超6000米。
Because of this steep rise, temperature and moisture shift rapidly, creating distinct vegetation belts stacked like layers on a cake.

因地势陡峻，气温与湿度迅速变化，形成如蛋糕层叠般分明的植被带。
At the base lie subtropical evergreen forests, while alpine meadows appear above 4,000 meters where cold winds limit tree growth.

山麓为亚热带常绿林，而4000米以上则为高山草甸，寒风抑制树木生长。
Glaciers cap the highest peaks, and snowmelt feeds rivers that flow south into Southeast Asia.

最高山峰终年积雪，冰川融水南流，滋养东南亚诸河。
Local ethnic communities have adapted farming practices to each zone, growing rice in valleys and barley on high slopes.

当地少数民族依不同海拔调整农耕方式：谷地种水稻，高坡种青稞。
Scientists monitor these bands closely, as climate warming pushes treelines upward and shrinks alpine habitats.

科学家密切监测这些垂直带，因气候变暖正推高林线、压缩高山栖息地。
Soil types also vary sharply—deep red earths dominate lowlands, whereas thin, rocky soils cover upper slopes.

土壤类型亦差异显著：低地以深厚红壤为主，高坡则多为浅薄石质土。
This vertical diversity supports over 6,000 plant species, more than all of Europe combined.

这种垂直多样性孕育了逾6000种植物，超过整个欧洲总和。
Unlike gradual transitions elsewhere, here one can hike through five climate zones in under 20 kilometers.

不同于其他地区平缓过渡，此处20公里内即可穿越五个气候带。
Such dramatic layering makes the Hengduan region a global natural laboratory for studying altitude-driven ecology.

如此鲜明的垂直分层，使横断山区成为研究海拔驱动生态的全球天然实验室。