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Potential damage caused by human activity in the river valley (a–e) and the subnival (f–k) ecosystems. (a) Road construction; (b) Hydropower station; (c) Heavy-duty machinery; (d) Factory construction; (e) Agricultural reclamation; (f) Road construction (g, h, j) Collecting and selling medicinal plants; (i) Mechanical excavation (k) Over-grazing. (a, e, j, k) by YZ Zhang; (b) by R Tang; (c) by JG Chen; (d, i) by WG Sun; (f) by HL Chen; (g) by B Song; (h) by LS Qian.
